Commit Graph

208 Commits

Author SHA1 Message Date
Adrian Taylor
c1479a92cf USB: Exposing second ACM channel as tty for Nokia S60 phones.
Nokia S60 phones expose two ACM channels. The first is a modem and is picked
up by the standard AT-command interface information in the CDC-ACM driver. The
second is marked as having a vendor-specific protocol. Normally, we don't
expose those as ttys. (On some other devices, they may be claimed by the
rndis_host driver and used as a network interface).

But on S60 this second ACM channel is the way that third-party S60 application
developers are expected to communicate over USB. It acts as a serial device
at the S60 end, and so it should on Linux too.

The list of devices is largely derived from:
http://wiki.forum.nokia.com/index.php/S60_Platform_and_device_identification_codes
http://wiki.forum.nokia.com/index.php/Nokia_USB_Product_IDs
and includes only the S60 3rd Edition+ devices documented there.

There are many devices for which the USB device ID is not documented,
including:
    Nokia 6290
    Nokia E63
    Nokia 5630 XpressMusic
    Nokia 5730 XpressMusic
    Nokia 6710 Navigator
    Nokia 6720 classic
    Nokia 6730 Classic
    Nokia 6760 slide
    Nokia 6790 slide
    Nokia 6790 Surge
    Nokia E52
    Nokia E55
    Nokia E71x (AT&T)
    Nokia E72
    Nokia E75
    Nokia E75 US+LTA variant
    Nokia N79
    Nokia N86 8MP
    Nokia 5230 (RM-588)
    Nokia 5230 (RM-594)
    Nokia 5530 XpressMusic
    Nokia 5530 XpressMusic (china)
    Nokia 5800 XM
    Nokia N97 (RM-506)
    Nokia N97 mini
    Nokia X6
It would be good to add those subsequently.

Signed-off-by: Adrian Taylor <aat@realvnc.com>
Acked-by: Oliver Neukum <oliver@neukum.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-11 11:55:20 -08:00
Oliver Neukum
dca8cd04df USB: usbtmc: minor formatting cleanups
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-11 11:55:16 -08:00
Jiri Kosina
d014d04386 Merge branch 'for-next' into for-linus
Conflicts:

	kernel/irq/chip.c
2009-12-07 18:36:35 +01:00
André Goddard Rosa
af901ca181 tree-wide: fix assorted typos all over the place
That is "success", "unknown", "through", "performance", "[re|un]mapping"
, "access", "default", "reasonable", "[con]currently", "temperature"
, "channel", "[un]used", "application", "example","hierarchy", "therefore"
, "[over|under]flow", "contiguous", "threshold", "enough" and others.

Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2009-12-04 15:39:55 +01:00
Francesco Lavra
051522bb47 USB: cdc_acm: Fix memory leak after hangup
Am Donnerstag, 10. September 2009 15:43:53 schrieb Dietmar Hilbrich:
> Hello,
>
> i have the following problem with the cdc-acm - driver:
>
> I'm using the driver with an "Ericsson F3507G" on a Thinkpad T400.
>
> If a disable the device (with the RFKill-Switch) while it is used by a
> programm like ppp, the driver doesn't seem to correctly clean up the tty,
> even after the program has been closed)
>
> The tty is still active (e.g. there still exists an entry in
> /sys/dev/char/166:0 if ttyACM0 was used) and if a reacticate the device,
> this device entry will be skipped and the Device-Nodes ttyACM1, ttyACM2
> and ttyACM3 will be used.
>
> This problem was introduced with the commit
> 10077d4a66 (before 2.6.31-rc1) and still
> exists in 2.6.31.
>
> I was able the fix this problem with the following patch:
>
> diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
> index 2bfc41e..0970d2f 100644
> --- a/drivers/usb/class/cdc-acm.c
> +++ b/drivers/usb/class/cdc-acm.c
> @@ -676,6 +676,7 @@ static void acm_tty_hangup(struct tty_struct *tty)
>         struct acm *acm = tty->driver_data;
>         tty_port_hangup(&acm->port);
>         acm_port_down(acm, 0);
> +       acm_tty_unregister(acm);
>  }

I have the same problem with cdc-acm (I'm using a Samsung SGH-U900): when I
unplug it from the USB port during a PPP connection, the ppp daemon gets the
hangup correctly (and closes the device), but the struct acm corresponding to
the device disconnected is not freed. Hence reconnecting the device results in
creation of /dev/ttyACM(x+1). The same happens when the system is hibernated
during a PPP connection.

This memory leak is due to the fact that when the tty is hung up,
tty_port_close_start() returns always zero, and acm_tty_close() never reaches
the point where acm_tty_unregister() is called.

Here is a fix for this.

Signed-off-by: Francesco Lavra <francescolavra@interfree.it>
Acked-by: Oliver Neukum <oliver@neukum.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-11-17 16:46:33 -08:00
Henry Gebhardt
18a77b5d23 USB: cdc_acm: Fix race condition when opening tty
If acm_rx_tasklet() gets called before tty_port_block_til_ready()
returns, then bulk IN urbs may not be sent. This fixes it.

Signed-off-by: Henry Gebhardt <gebhardt@astro.uni-tuebingen.de>
Acked-by: Oliver Neukum <oliver@neukum.org>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-11-17 16:46:33 -08:00
Gergely Imreh
35f76e897d USB: usbtmc: fix timeout increase
The current 10ms timeout is too short for some normal USBTMC device
operation, increase it to a value which was tested with previously
affected Tektronix oscilloscopes.

Signed-off-by: Gergely Imreh <imrehg@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-10-09 13:52:06 -07:00
Alexey Dobriyan
828c09509b const: constify remaining file_operations
[akpm@linux-foundation.org: fix KVM]
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-10-01 16:11:11 -07:00
Gergely Imreh
d0a38365d9 USB: fix USBTMC get_capabilities success handling
In order:
Add reference to relevant section of USBTMC usb488 subclass specs.
Print debug output of capabilities only when it was retrieved successfully.
Clear return value on success, otherwise driver always reports failure.

Signed-off-by: Gergely Imreh <imrehg@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-23 06:46:39 -07:00
Steve Holland
4143d178e7 USB: usbtmc: correct termination condition for reads.
Follow T&M convention of obeying EOM flag.  Avoid exception cases where
instrument response size matches a buffer size.

Signed-off-by: Steve Holland <sdh4@iastate.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-23 06:46:35 -07:00
Steve Holland
92d07e422d USB: usbtmc: inhibit corruption
Limit data copied to userspace to amount requested.  Prevents a faulty
instrument from overwriting user memory.

Signed-off-by: Steve Holland <sdh4@iastate.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-23 06:46:35 -07:00
Steve Holland
c2cd26e15b USB: usbtmc: Fix short reads in usbtmc_read()
The header size should not be included in the number of bytes requested of the
instrument

Signed-off-by: Steve Holland <sdh4@iastate.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-23 06:46:35 -07:00
Randy Dunlap
a2fbf10eba USB: usbtmc: fix printk format warnings
Fix printk format warnings:
drivers/usb/class/usbtmc.c:466: warning: format '%zu' expects type 'size_t', but argument 4 has type 'u32'
drivers/usb/class/usbtmc.c:466: warning: format '%zu' expects type 'size_t', but argument 5 has type 'int'

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-23 06:46:30 -07:00
Guus Sliepen
665d7662d1 USB: usbtmc: sanity checks for DEV_DEP_MSG_IN urbs
According to the specifications, an instrument should not return more data in a
DEV_DEP_MSG_IN urb than requested.  However, some instruments can send more
than requested. This could cause the kernel to write the extra data past the
end of the buffer provided by read().

Fix this by checking that the value of the TranserSize field is not larger than
the urb itself and not larger than the size of the userspace buffer. Also
correctly decrement the remaining size of the buffer when userspace read()s
more than USBTMC_SIZE_IOBUFFER.

Signed-off-by: Guus Sliepen <guus@sliepen.org>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-23 06:46:30 -07:00
Oliver Neukum
a4708103ad USB: suspend/resume support for usbtmc
a class driver should have suspend/resume. This makes sure we
don't see a virtual disconnect unnecessarily.

Signed-off-by: Oliver Neukum <oliver@neukum.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-23 06:46:28 -07:00
Oliver Neukum
86286883fc USB: usbtmc can do IO to device after disconnect
usbtmc will happily complete read/write requests even after disconnect
has returned. The fix is to introduce a flag.


Signed-off-by: Oliver Neukum <oliver@neukum.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-23 06:46:28 -07:00
Oliver Neukum
7af25b4b34 USB: fix cdc-acm regression in open
cdc-acm needs to set a flag during open to tell the
tty layer that the device is initialized

Signed-off-by: Oliver Neukum <oliver@neukum.org>
Cc: Marcel Holtmann <marcel@holtmann.org>
Cc: Paul Martin <pm@debian.org>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-23 06:46:16 -07:00
Oliver Neukum
7f1dc313d0 USB: CDC WDM driver doesn't support non-blocking reads
support for O_NONBLOCK in read and write path
by simply not waiting for data in read or availability
of the write urb in write but returning -EAGAIN

Signed-off-by: Oliver Neukum <oliver@neukum.org>
Tested-by: Marcel Holtmann <marcel@holtmann.org>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-23 06:46:16 -07:00
Joe Perches
a419aef8b8 trivial: remove unnecessary semicolons
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2009-09-21 15:14:58 +02:00
Linus Torvalds
a57c21c715 Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6:
  Driver-Core: extend devnode callbacks to provide permissions
2009-09-20 15:55:39 -07:00
Alan Cox
9b80fee149 cdc_acm: Fix to use modern speed interfaces
This changed in 2006 so its about time the ACM driver caught up

Signed-off-by: Alan Cox <alan@linux.intel.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-19 13:13:23 -07:00
Kay Sievers
e454cea20b Driver-Core: extend devnode callbacks to provide permissions
This allows subsytems to provide devtmpfs with non-default permissions
for the device node. Instead of the default mode of 0600, null, zero,
random, urandom, full, tty, ptmx now have a mode of 0666, which allows
non-privileged processes to access standard device nodes in case no
other userspace process applies the expected permissions.

This also fixes a wrong assignment in pktcdvd and a checkpatch.pl complain.

Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-19 12:50:38 -07:00
Oliver Neukum
cf7fdd57f9 USB: fix oops on disconnect in cdc-acm
This patch fixes an oops caused when during an unplug a device's table
of endpoints is zeroed before the driver is notified. A pointer to
the endpoint must be cached.

this fixes a regression caused by commit
5186ffee23
Therefore it should go into 2.6.31

Signed-off-by: Oliver Neukum <oliver@neukum.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 16:05:14 -07:00
Alan Cox
23198fda71 tty: fix chars_in_buffers
This function does not have an error return and returning an error is
instead interpreted as having a lot of pending bytes.

Reported by Jeff Harris who provided a list of some of the remaining
offenders.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-07-20 16:38:43 -07:00
Linus Torvalds
51feb98d25 Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6: (48 commits)
  USB: otg: fix module reinsert issue
  USB: handle zero-length usbfs submissions correctly
  USB: EHCI: report actual_length for iso transfers
  USB: option: remove unnecessary and erroneous code
  USB: cypress_m8: remove invalid Clear-Halt
  USB: musb_host: undo incorrect change in musb_advance_schedule()
  USB: fix LANGID=0 regression
  USB: serial: sierra driver id_table additions
  USB serial: Add ID for Turtelizer, an FT2232L-based JTAG/RS-232 adapter.
  USB: fix race leading to a write after kfree in usbfs
  USB: Sierra: fix oops upon device close
  USB: option.c: add A-Link 3GU device id
  USB: Serial: Add support for Arkham Technology adapters
  USB: Fix option_ms regression in 2.6.31-rc2
  USB: gadget audio: select SND_PCM
  USB: ftdi: support NDI devices
  Revert USB: usbfs: deprecate and hide option for !embedded
  USB: usb.h: fix kernel-doc notation
  USB: RNDIS gadget, fix issues talking from PXA
  USB: serial: FTDI with product code FB80 and vendor id 0403
  ...
2009-07-13 10:23:03 -07:00
Arseniy Lartsev
5186ffee23 USB: cdc-acm: work around some broken devices
This patch introduces a work around for cdc-acm devices which are
low speed contrary to the specification, which requires bulk endpoints
which are banned in low speed and converted by usbcore to virtual
interrupt endpoints if they are used nevertheless.

Signed-off-by: Arseniy Lartsev <ars3n@yandex.ru>
Cc: Oliver Neukum <oliver@neukum.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-12 15:16:37 -07:00
Oliver Neukum
ca157c4a51 USB: fix memory leak in usbtmc
If an error is returned kfree must also be called.


Signed-off-by: Oliver Neukum <oliver@neukum.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-12 15:16:37 -07:00
Alexey Dobriyan
405f55712d headers: smp_lock.h redux
* Remove smp_lock.h from files which don't need it (including some headers!)
* Add smp_lock.h to files which do need it
* Make smp_lock.h include conditional in hardirq.h
  It's needed only for one kernel_locked() usage which is under CONFIG_PREEMPT

  This will make hardirq.h inclusion cheaper for every PREEMPT=n config
  (which includes allmodconfig/allyesconfig, BTW)

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-07-12 12:22:34 -07:00
Thadeu Lima de Souza Cascardo
922b13565b acm: Fix oops when closing ACM tty device right after open has failed.
This commit 10077d4a66 has stopped
checking if there was a valid acm device associated to the tty, which is
not true right after open fails and tty subsystem tries to close the
device.

As an example, open fails with a non-existing device, when probe has
never been called, because the device has never been plugged. This is
common in systems with static modules and no udev.

Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-25 11:24:26 -07:00
Thadeu Lima de Souza Cascardo
42dd2aa649 acm: Return ENODEV instead of EINVAL when trying to open ACM device.
This is required, otherwise a user will get a EINVAL while opening a
non-existing device, instead of ENODEV.

This is what I get with this patch applied now instead of an "Invalid
argument".

  cascardo@vespa:~$ cat /dev/ttyACM0
  cat: /dev/ttyACM0: No such device
  cascardo@vespa:~$

Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-25 11:24:26 -07:00
Linus Torvalds
e1f5b94fd0 Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6: (143 commits)
  USB: xhci depends on PCI.
  USB: xhci: Add Makefile, MAINTAINERS, and Kconfig entries.
  USB: xhci: Respect critical sections.
  USB: xHCI: Fix interrupt moderation.
  USB: xhci: Remove packed attribute from structures.
  usb; xhci: Fix TRB offset calculations.
  USB: xhci: replace if-elseif-else with switch-case
  USB: xhci: Make xhci-mem.c include linux/dmapool.h
  USB: xhci: drop spinlock in xhci_urb_enqueue() error path.
  USB: Change names of SuperSpeed ep companion descriptor structs.
  USB: xhci: Avoid compiler reordering in Link TRB giveback.
  USB: xhci: Clean up xhci_irq() function.
  USB: xhci: Avoid global namespace pollution.
  USB: xhci: Fix Link TRB handoff bit twiddling.
  USB: xhci: Fix register write order.
  USB: xhci: fix some compiler warnings in xhci.h
  USB: xhci: fix lots of compiler warnings.
  USB: xhci: use xhci_handle_event instead of handle_event
  USB: xhci: URB cancellation support.
  USB: xhci: Scatter gather list support for bulk transfers.
  ...
2009-06-16 13:06:10 -07:00
Greg Kroah-Hartman
a92b63e7e4 USB: usbtmc: fix switch statment
Steve Holland pointed out that we forgot to call break; in the switch
statment.  This probably resolves a lot of the bug reports I've gotten
for the driver lately.

Stupid me...

Reported-by: Steve Holland <sdh4@iastate.edu>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-06-15 21:44:48 -07:00
Kir Kolyshkin
1f17c5026c USB: cdc-acm: quirk for Alcatel OT-I650
This mobile phone fails to work as a modem, failing with:
 cdc_acm: Zero length descriptor references
 cdc_acm: probe of 1-6.1.3:1.1 failed with error -22

Tested to work fine with this patch.

Signed-off-by: Kir Kolyshkin <kir@openvz.org>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-06-15 21:44:46 -07:00
Oliver Neukum
a2bfb4a346 USB: support for cdc-acm of single interface devices
This implement support in cdc-acm for acm devices another popular OS can handle

- adds support for autodetection of devices that use one interface
- autodetection of endpoints
- add a quirk for surpressing a setting that OS doesn't use
- autoassume that quirk for single interface devices

Signed-off-by: Oliver Neukum <oliver@neukum.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-06-15 21:44:45 -07:00
Kay Sievers
f7a386c5b8 Driver Core: usb: add nodename support for usb drivers.
This adds support for USB drivers to report their requested nodename to
userspace.  It also updates a number of USB drivers to provide the
needed subdirectory and device name to be used for them.

Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Jan Blunck <jblunck@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-06-15 21:30:25 -07:00
Alan Cox
6e47e069eb tty: Clean up the ACM driver to CodingStyle
Or at least most of it. There are further clean ups possible and there are
are also thing checkpatch moans about that would be silly to "fix".

Also note some FIXME points found as the cleanup was done.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11 08:50:58 -07:00
Alan Cox
10077d4a66 tty: cdc_acm add krefs
Now we have a port structure begin using the fields and kref counts

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11 08:50:58 -07:00
Alan Cox
739e0285cb tty: Update cdc_acm
The CDC ACM driver uses the tty layer correctly so needs conversion. Start by
adding and initializing the port structures.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11 08:50:57 -07:00
Xiao Kaijian
cab98a0a34 USB: Yet another Conexant Clone to add to cdc-acm.c
This patch adds another quirky Conexant USB Modem Clone to usb cdc-acm.c

Signed-off-by: Xiao Kaijian <xiaokj@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-05-28 13:54:41 -07:00
Oliver Neukum
052fbc0d7f USB: correct error handling in cdc-wdm
This patch to cdc-wdm

- checks for partial extra descriptors
- fixes a leak in the error case of probe
- checks for an exact number of endpoints
- adds a clarifying comment

Signed-off-by: Oliver Neukum <oliver@neukum.org>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-23 14:15:30 -07:00
Oliver Neukum
e13c594f3a USB: fix oops in cdc-wdm in case of malformed descriptors
cdc-wdm needs to ignore extremely malformed descriptors.

Signed-off-by: Oliver Neukum <oliver@neukum.org>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-17 10:50:24 -07:00
Alan Cox
7a9a65ced1 cdc-acm: Fix long standing abuse of tty->low_latency
ACM sets the low latency flag but calls the flip buffer routines from
IRQ context which isn't permitted (and as of 2.6.29 causes a warning
hence this one was caught)

Fortunatelt ACM doesn't need to set this flag in the first place as it
only set it to work around problems in ancient (pre tty flip rewrite)
kernels.

Reported-by: Chuck Ebbert <cebbert@redhat.com>
Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-14 08:48:50 -07:00
Alan Cox
7abcf20b8f cdc-acm: zydas 1602 identifier needed
Bugzilla #9095 and a couple of other confirmations

Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-06 14:36:38 -07:00
Scott James Remnant
e766aeb882 usb: Auto-load cdc_acm module when device opened.
The cdc_acm module is missing the char-major-166-* alias that would
cause it to be auto-loaded when a device of that type is opened.  This
patch adds the alias.

Signed-off-by: Scott James Remnant <scott@canonical.com>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-06 14:36:31 -07:00
Pete Zaitcev
dd44be6b17 usblp: continuously poll for status
The usblp in 2.6.18 polled for status regardless if we actually needed it.
At some point I dropped it, to save the batteries if nothing else.
As it turned out, printers exist (e.g. Canon BJC-3000) that need prodding
this way or else they stop. This patch restores the old behaviour.
If you want to save battery, don't leave jobs in the print queue.

I tested this on my printers by printing and examining usbmon traces
to make sure status is being requested and printers continue to print.
Tuomas Jäntti verified the fix on BJC-3000.

Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-03-24 16:20:26 -07:00
Greg Kroah-Hartman
228dd05dbf USB: usbtmc: add protocol 1 support
The driver already supports the 1 protocol support, so just add it to
the MODULE_DEVICE_TABLE entry so it properly picks up these devices.

Thanks to Jouni Rynö for pointing this out.

Reported-by: Jouni Ryno <Jouni.Ryno@fmi.fi>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-03-17 14:01:28 -07:00
Greg Kroah-Hartman
5b10916ea0 USB: usbtmc: fix stupid bug in open()
open() will never succeed, as we always return -ENODEV.  Fix this
obvious bug.

Thanks to Jouni Ryno for reporting it.

Reported-by: Jouni Ryno <Jouni.Ryno@fmi.fi>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-03-17 14:01:28 -07:00
Adam Richter
c332b4e1bf USB: Quirk for Hummingbird huc56s / Conexant ACM modem
Signed-off-by: Adam J. Richter <adam_richter2004@yahoo.com>
Cc: Oliver Neukum <oliver@neukum.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-02-27 14:40:50 -08:00
Dmitriy Taychenachev
155df65ae1 USB: cdc-acm: add usb id for motomagx phones
The Motorola MOTOMAGX phones (Z6, E8, Zn5 so far) are providing
combined ACM/BLAN USB configuration. Since it has Vendor Specific
class, the corresponding drivers (cdc-acm, zaurus) can't find it just
by interface info. This patch adds usb id so the cdc-acm driver can
properly handle this combined device.

Signed-off-by: Dmitriy Taychenachev <dimichxp@gmail.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-02-27 14:40:50 -08:00
James Treacy
2057ac86da USB: cdc-acm.c: remove duplicate lines for MTK gps support
The same patch to add support for MTK gps loggers was submitted by two
different people and applied twice. Remove the redundant lines.

Signed-off-by: James Treacy <treacy@debian.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-02-09 11:19:47 -08:00
Alan Cox
c89c60e9d6 USB: cdc-acm: Add another conexant modem to the quirks
Another Conexant, another device with the same quirk

Signed-off-by: Alan Cox <alan@redhat.com>
Acked-by: Oliver Neukum <oliver@neukum.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-01-27 16:15:37 -08:00
Brandon Philips
06a743bfc4 USB: usblp.c: add USBLP_QUIRK_BIDIR to Brother HL-1440
My Brother HL-1440 would print one document before CUPS would stop
printing with the error "Printer not connected; will retry in 30
seconds...". I traced this down to the CUPS usb backend getting an EIO
out of usblp on the IOCNR_GET_DEVICE_ID IOCTL. Adding the
USBLP_QUIRK_BIDIR fixes the problem but is it the right solution?

output from strace /usr/lib/cups/backend/usb after printing a document
(Note: SNDCTL_DSP_SYNC == IOCNR_GET_DEVICE_ID):

before patch

open("/dev/usb/lp0", O_RDWR|O_EXCL)     = 3
ioctl(3, SNDCTL_DSP_SYNC, 0x7fff2478cef0) = -1 EIO (Input/output error)

after patch

open("/dev/usb/lp0", O_RDWR|O_EXCL)     = 3
ioctl(3, SNDCTL_DSP_SYNC, 0x7fffb8d474c0) = 0

Possibly related bug: https://bugs.launchpad.net/ubuntu/+source/cupsys/+bug/35638

Signed-off-by: Brandon Philips <bphilips@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-01-27 16:15:36 -08:00
Andrew Lunn
0f9c7b4a1c USB: CDC-ACM quirk for MTK GPS
This patch adds a device quirk for a MediaTek Inc GPS chipset. The
device implements USB CDC ACM, but is missing the union descriptor, so
the ACM class driver fails to probe the device.

I've tested this patch with an iBlue A+ GPS which uses this chipset
and using kernel 2.6.28-rc9.

Signed-off-by: Andrew Lunn, <andrew@lunn.ch>
Acked-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-01-27 16:15:36 -08:00
James A. Treacy
837d842496 USB: cdc-acm: support some gps data loggers
Below is a patch which allows a number of GPS loggers to work
under linux. It is known to support the i-Blue 747 (all models),
i-Blue 757, Qstarz BT-Q1000, i.Trek Z1, Konet BGL-32, and the Holux
M-241.

From: James A. Treacy <treacy@debian.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-01-27 16:15:36 -08:00
Alan Stern
65bfd2967c USB: Enhance usage of pm_message_t
This patch (as1177) modifies the USB core suspend and resume
routines.  The resume functions now will take a pm_message_t argument,
so they will know what sort of resume is occurring.  The new argument
is also passed to the port suspend/resume and bus suspend/resume
routines (although they don't use it for anything but debugging).

In addition, special pm_message_t values are used for user-initiated,
device-initiated (i.e., remote wakeup), and automatic suspend/resume.
By testing these values, drivers can tell whether or not a particular
suspend was an autosuspend.  Unfortunately, they can't do the same for
resumes -- not until the pm_message_t argument is also passed to the
drivers' resume methods.  That will require a bigger change.

IMO, the whole Power Management framework should have been set up this
way in the first place.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-01-07 10:00:03 -08:00
Ilpo Järvinen
857cc4dfb6 USB: usbtmc: indent & braces disagree, something else is desired
It seems that there's rather involved way to say something
which is commonly written in a plain simple form.

Some type changes would probably be necessary to get gcc
to do bitops instead of divide but it's no worse after my
change than before I think.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-01-07 09:59:51 -08:00
Greg Kroah-Hartman
5413aa4678 USB: fix problem with usbtmc driver not loading properly
The usbtmc driver forgot to export its device table to userspace.
Without this, it is never loaded properly when such a device is seen by
the system.

Cc: Marcel Janssen <marcel.janssen@admesy.nl>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-12-17 10:49:10 -08:00
Brandon Philips
ad0b65efd1 USB: cdc-acm.c: fix recursive lock in acm_start_wb error path
Fixes an obvious bug in cdc-acm by avoiding a recursive lock on
acm_start_wb()'s error path. Should apply towards 2.6.27 stable and
2.6.28.

=============================================
[ INFO: possible recursive locking detected ]
2.6.27-2-pae #109
---------------------------------------------
python/31449 is trying to acquire lock:
 (&acm->write_lock){++..}, at: [<f89a0348>] acm_start_wb+0x5c/0x7b [cdc_acm]

but task is already holding lock:
 (&acm->write_lock){++..}, at: [<f89a04fb>] acm_tty_write+0xe1/0x167 [cdc_acm]

other info that might help us debug this:
2 locks held by python/31449:
 #0:  (&tty->atomic_write_lock){--..}, at: [<c0260fae>] tty_write_lock+0x14/0x3b
 #1:  (&acm->write_lock){++..}, at: [<f89a04fb>] acm_tty_write+0xe1/0x167 [cdc_acm]

stack backtrace:
Pid: 31449, comm: python Not tainted 2.6.27-2-pae #109
 [<c030f42f>] ? printk+0xf/0x18
 [<c0149f33>] __lock_acquire+0xc7b/0x1316
 [<c014a63e>] lock_acquire+0x70/0x97
 [<f89a0348>] ? acm_start_wb+0x5c/0x7b [cdc_acm]
 [<c0312109>] _spin_lock_irqsave+0x37/0x47
 [<f89a0348>] ? acm_start_wb+0x5c/0x7b [cdc_acm]
 [<f89a0348>] acm_start_wb+0x5c/0x7b [cdc_acm]
 [<f89a055d>] acm_tty_write+0x143/0x167 [cdc_acm]
 [<c0262a98>] write_chan+0x1cd/0x297
 [<c012527e>] ? default_wake_function+0x0/0xd
 [<c026111e>] tty_write+0x149/0x1b9
 [<c02628cb>] ? write_chan+0x0/0x297
 [<c01912c5>] ? rw_verify_area+0x76/0x98
 [<c0260fd5>] ? tty_write+0x0/0x1b9
 [<c01919ba>] vfs_write+0x8c/0x136
 [<c0191afd>] sys_write+0x3b/0x60
 [<c0103beb>] sysenter_do_call+0x12/0x3f
 =======================

Signed-off-by: Brandon Philips <bphilips@suse.de>
Cc: Oliver Neukum <oliver@neukum.org>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-11-13 14:45:02 -08:00
Chris Malley
b361a6e348 USB: usbtmc: Use explicit unsigned type for input buffer instead of char*
Silences compiler warning about comparison with 0x80, and type now matches the
corresponding _bulk_out function.

drivers/usb/class/usbtmc.c: In function ‘usbtmc_ioctl_abort_bulk_in’:
drivers/usb/class/usbtmc.c:163: warning: comparison is always false due to limited range of data type

Signed-off-by: Chris Malley <mail@chrismalley.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-10-29 14:54:40 -07:00
Oliver Neukum
a496c64f13 USB: fix memory leak in cdc-acm
This fixes a memory leak on disconnect in cdc-acm

Thanks to 施金前 for finding it.

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-10-22 10:05:29 -07:00
Oliver Neukum
aa5380b904 USB: cdc-wdm: make module autoload work
this fixes an omission that led to no alias being computed for the
cdc-wdm module.

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-10-22 10:05:29 -07:00
Greg Kroah-Hartman
9908a32e94 USB: remove err() macro from usb class drivers
USB should not be having it's own printk macros, so remove err() and
use the system-wide standard of dev_err() wherever possible.  In the
few places that will not work out, use a basic printk().

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-10-17 14:41:10 -07:00
Greg Kroah-Hartman
5909f6ea2b USB: remove info() macro from remaining usb drivers
USB should not be having it's own printk macros, so remove info() and
use the system-wide standard of dev_info() wherever possible.  In the
few places that will not work out, use a basic printk().

Clean up the remaining usages of this in the drivers/usb/ directory.

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-10-17 14:41:09 -07:00
Julia Lawall
49b707b90c drivers/usb/class/usblp.c: adjust error handling code
In this code, it is possible to tell statically whether usblp will be NULL
in the error handling code.

Oliver Neukum suggested to make a goto to the final return rather than 
return directly.

The semantic match that finds this problem is as follows:
(http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@@
identifier f,err,l,l1;
type T;
expression x,E;
statement S;
@@

x = NULL
... when != goto l1;
* x = f(...)
... when != x
err = E;
goto l;
...
* if (x != NULL)
  S
return err;
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Cc: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-10-17 14:40:51 -07:00
Greg Kroah-Hartman
5b775f672c USB: add USB test and measurement class driver
This driver was originaly written by Stefan Kopp, but massively
reworked by Greg for submission.

Thanks to Felipe Balbi <me@felipebalbi.com> for lots of work in cleaning
up this driver.

Thanks to Oliver Neukum <oliver@neukum.org> for reviewing previous
versions and pointing out problems.


Cc: Stefan Kopp <stefan_kopp@agilent.com>
Cc: Marcel Janssen <korgull@home.nl>
Cc: Felipe Balbi <me@felipebalbi.com>
Cc: Oliver Neukum <oliver@neukum.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-10-17 14:40:51 -07:00
Alexey Dobriyan
74573ee709 USB: cdc-acm: don't unlock acm->mutex on error path
On Wed, Jul 23, 2008 at 03:52:36PM +0300, Andrei Popa wrote:
> I installed gnokii-0.6.22-r2 and gave the command "gnokii --identify"
> and the kernel oopsed:
>
> BUG: unable to handle kernel NULL pointer dereference at 00000458
> IP: [<c0444b52>] mutex_unlock+0x0/0xb
>  [<c03830ae>] acm_tty_open+0x4c/0x214

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Tested-by: Andrei Popa <andrei.popa@i-neo.ro>
Cc: stable <stable@kernel.org>		[2.6.25.x, 2.6.26.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-08-21 10:26:35 -07:00
Eric Sandeen
c8fd2c37b9 USB: cdc-acm: quirk for Conexant CX93010 USB modem
This patch gets my Rosewill RNX-56USB USB modem (with Conexant CX93010
chipset) up and running to the point where I can send AT commands and
retrieve caller ID data, which is all I want to do with it.

Signed-off-by: Eric Sandeen <sandeen@sandeen.net>
Acked-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-08-21 10:26:33 -07:00
David Brownell
e5fbab51b4 usb: cdc-acm: drain writes on close
Add a mechanism to let the write queue drain naturally before
closing the TTY, rather than always losing that data.  There
is a timeout, so it can't wait too long.

Provide missing locking inside acm_wb_is_avail(); it matters
more now.  Note, this presumes an earlier patch was applied,
removing a call to this routine where the lock was held.

Slightly improved diagnostics on write URB completion, so we
can tell when a write URB gets killed and, if so, how much
data it wrote first ... and so that I/O path is normally
silent (and can't much change timings).

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-08-13 17:32:57 -07:00
David Brownell
934da4635c usb: cdc-acm: stop dropping tx buffers
The "increase cdc-acm write throughput" patch left in place two
now-obsolete mechanisms, either of which can make the cdc-acm
driver drop TX data (nasty!).  This patch removes them:

  - The write_ready flag ... if an URB and buffer were found,
    they can (and should!) always be used.

  - TX path acm_wb_is_used() ... used when the buffer was just
    allocated, so that check is pointless.

Also fix a won't-yet-matter leak of a write buffer on a disconnect path.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Cc:  David Engraf <david.engraf@netcom.eu>
Acked-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-08-13 17:32:57 -07:00
David Brownell
672c4e1843 usb: cdc-acm: bugfix release()
Bugfixes to the usb_driver_release_interface() usage;

  (a) make sure releasing *either* interface first will release
      the other, instead of insisting it be the control interface;

  (b) remove the recently-added self-deadlock.

(The "fix disconnect bug in cdc-acm" patch was incomplete and incorrect.)

Plus a small "sparse" fix:  rename a local variable so it doesn't
shadow a function parameter.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Acked-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-08-13 17:32:57 -07:00
Takashi Iwai
81eb8adfce USB: cdc-acm.c: Fix compile warnings
The irq flags should be unsigned long.

  CC [M]  drivers/usb/class/cdc-acm.o
drivers/usb/class/cdc-acm.c: In function 'acm_waker':
drivers/usb/class/cdc-acm.c:527: warning: comparison of distinct pointer types lacks a cast
drivers/usb/class/cdc-acm.c:529: warning: comparison of distinct pointer types lacks a cast

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-08-13 17:32:56 -07:00
Alan Cox
9e98966c7b tty: rework break handling
Some hardware needs to do break handling itself and may have partial
support only. Make break_ctl return an error code. Add a tty driver flag
so you can indicate driver hardware side break support.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-22 13:03:28 -07:00
Oliver Neukum
357585892e USB: fix build error in cdc-acm for CONFIG_PM=n
Here's the fix. cdc-wdm has the same problem. The fix is the same.

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-07-21 15:16:47 -07:00
Oliver Neukum
830f4021a8 USB: fix disconnect bug in cdc-acm
cdc-acm must give up secondary interfaces if the primary is disconnected
and vice versa. This wasn't done correctly.

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-07-21 15:16:37 -07:00
Oliver Neukum
17d80d562f USB: autosuspend for cdc-wdm
this patch implements

- suspend/resume
- aggressive autosuspend for the cdc-wdm driver
- pre/post_reset

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-07-21 15:16:36 -07:00
Oliver Neukum
11ea859d64 USB: additional power savings for cdc-acm devices that support remote wakeup
this patch saves power for cdc-acm devices that support remote wakeup
while the device is connected.

- request needs_remote_wakeup when needed
- delayed write while a device is autoresumed
- the device is marked busy when appropriate

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-07-21 15:16:36 -07:00
Oliver Neukum
87d65e54b6 USB: cdc-wdm cleanup
- fixes an error with filling out control requests
- increases grepability and error logging
- fixes the short read code path

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-07-21 15:16:31 -07:00
Oliver Neukum
4b828abed2 USB: fix cdc-acm resume()
cdc-acm has
- a memory leak in resume()
- will fail to reactivate the read code path if this is needed.
his corrects it by deleting the useless relict code.

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-07-03 18:20:36 -07:00
Al Viro
fa4144b758 cdc-wdm endianness fixes
* wMaxPacketSize is le16; copying it to a field of local structure and then
  using that field as host-endian (size of object to be allocated) is broken.
* bMaxPacketSize0 is 8-bit; feeding it to le16_to_cpu() is bogus and since the
  result is used as host-endian, it's not even misspelled cpu_to_le16().

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-06-04 08:06:01 -07:00
Oliver Neukum
afba937e54 USB: CDC WDM driver
Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-05-20 14:14:15 -07:00
Iain McFarlane
6149ed5e3a USB: add Zoom Telephonics Model 3095F V.92 USB Mini External modem to cdc-acm
The patch below is a necessary workaround to support the Zoom Telephonics Model 3095F V.92 USB Mini External modem, which fails to initialise properly during normal probing thus:

May  3 22:53:00 imcfarla kernel: drivers/usb/class/cdc-acm.c: Zero length descriptor references
May  3 22:53:00 imcfarla kernel: cdc_acm: probe of 5-2:1.0 failed with error -22

Adding the patch below causes the probing section to be skipped, and the modem
then initialises correctly.

Signed-off-by: Iain McFarlane <iain@imcfarla.homelinux.net>
Acked-by: Oliver Neukum <oneukum@suse.de>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-05-14 10:00:27 -07:00
Harvey Harrison
a5abdeafed usb: use get/put_unaligned_* helpers
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29 08:06:28 -07:00
Ming Lei
cdc9779228 USB: remove unnecessary type casting of urb->context
urb->context code cleanup

Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-24 21:16:55 -07:00
Harvey Harrison
441b62c1ed USB: replace remaining __FUNCTION__ occurrences
__FUNCTION__ is gcc-specific, use __func__

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-24 21:16:55 -07:00
David Brownell
c6dbf554bc USB: cdc-acm: signedness fix
Fix bogus assignment of "unsigned char *" to "char *":  preserve
unsignedness.  These values are used directly as descriptor lengths
when iterating through the buffer, so this *could* cause oddness
that potentially includes oopsing.  (IMO not likely, except as
part of a malicious device...)

Fix the bogus warning in CDC ACM which highlighted this problem
(by showing a negative descriptor type).  It uses the undesirable
legacy err() for something that's not even an error; switch to
use dev_dbg, and show descriptor types in hex notation to match
the convention for such codes.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Acked-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-24 21:16:53 -07:00
David Engraf
e4cf3aa8f9 USB: increase cdc-acm write throughput
the following patch uses 16 write urbs and a writsize of wMaxPacketSize
* 20.  With this patch I get the maximum througput from my linux system
with 20MB/sec read and 15 MB/sec write (full speed 1 MB/sec both)

I also deleted the flag URB_NO_FSBR for the writeurbs, because this
makes my full speed devices significant slower.

Signed-off-by: David Engraf <david.engraf@netcom.eu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-24 21:16:44 -07:00
David Engraf
28d1dfadd3 USB: cdc-acm tell tty layer not to split things up.
It ensures that the tty level do not split
the send buffer into 2KB blocks.


Signed-off-by: David Engraf <david.engraf@netcom.eu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-24 21:16:44 -07:00
Oliver Neukum
94409cc1e5 USB: fix usb open suspend race in cdc-acm
this fixes a race between open and disconnect in the CDC ACM driver.

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-02-21 15:38:49 -08:00
Oliver Neukum
1902869019 USB: fix pm counter leak in usblp
if you fail in open() you must decrement the pm counter again.

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Cc: stable <stable@kernel.org>
Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
2008-02-21 15:38:48 -08:00
Joe Perches
dc0d5c1e5c USB: Spelling fixes
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-02-01 14:34:57 -08:00
Oliver Neukum
1365baf724 USB: autosuspend for cdc-acm
Here we go. This patch implements suspend/resume and autosuspend
for the CDC ACM driver.

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-02-01 14:34:47 -08:00
Joe Perches
898eb71cb1 Add missing newlines to some uses of dev_<level> messages
Found these while looking at printk uses.

Add missing newlines to dev_<level> uses
Add missing KERN_<level> prefixes to multiline dev_<level>s
Fixed a wierd->weird spelling typo
Added a newline to a printk

Signed-off-by: Joe Perches <joe@perches.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Cc: Mark M. Hoffman <mhoffman@lightlink.com>
Cc: Roland Dreier <rolandd@cisco.com>
Cc: Tilman Schmidt <tilman@imap.cc>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Jeff Garzik <jeff@garzik.org>
Cc: Stephen Hemminger <shemminger@linux-foundation.org>
Cc: Greg KH <greg@kroah.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: David Brownell <david-b@pacbell.net>
Cc: James Smart <James.Smart@Emulex.Com>
Cc: Andrew Vasquez <andrew.vasquez@qlogic.com>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Cc: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Jaroslav Kysela <perex@suse.cz>
Cc: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-18 14:37:28 -07:00
Pete Zaitcev
42cb967fd0 usblp: Fix a double kfree
If submit fails, slab hits a BUG() because of a double kfree.
The today's lesson is, you cannot just slap USB_FREE_BUFFER on code
without adjusting the error paths.

The patch is made bigger by opportunistic refactoring.

Signed-Off-By: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-10-12 14:55:15 -07:00
Pete Zaitcev
283face86b usblp: Cosmetics
This is a small bunch of cosmetic fixes:
 - Timeout is not a write timeout anymore, rename
 - Condition in poll was confusingly backwards, invert and simplify
 - The comment log gave a wrong impression of version 0.13, terminate it.

Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-10-12 14:55:14 -07:00
Pete Zaitcev
fc401e697f usblp: mutex in usblp_check_status
Add a mutex to protect the ->statusbuf. Not really an issue, because CUPS
is single-threaded when it talks to the printer, but I feel safer this way.
This should be deadlock-free, but I kept this as a separate patch in case
someone ends running a git bisect.

Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-10-12 14:55:14 -07:00
Pete Zaitcev
e8fa0ce65c usblp: Make use of URB_FREE_BUFFER
Employ the new API URB_FREE_BUFFER that we've got. There was talk of a combined
constructor for this case, but apparently it's not happening, so just set the
flag explicitly for now.

Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-10-12 14:54:58 -07:00
Pete Zaitcev
7f477358e2 usblp: Implement the ENOSPC convention
This patch implements a mode when a printer returns ENOSPC when it runs
out of paper. The default remains the same as before. An application which
wishes to use this function has to enable it explicitly with an ioctl
LPABORT.

This is done on a request by our (Fedora) CUPS guy, Tim Waugh. The API is
similar enough to the lp0's one that CUPS works with both (but see below),
but it's has some differences.

Most importantly, the abort mode is persistent in case of lp0: once tunelp
was run your cat fill blow up until you reboot or run tunelp again. For
usblp, I made it so the abort mode is only in effect as long as device
is open. This way you can mix and match CUPS and cat(1) freely and nothing
bad happens even if you run out of paper. It is also safer in the face
of any unexpected crashes.

It has to be noted that mixing LPABORT and O_NONBLOCK is not advised.
It probably does not do what you want: instead of returning -ENOSPC
it will always return -EAGAIN (because it would otherwise block while
waiting for the paper). Applications which use O_NONBLOCK should continue
to use LPGETSTATUS like before.

Finally, CUPS actually requires patching to take full advantage of this.
It has several components; those which invoke LPABORT work, but some of
them need the ioctl added. This is completely compatible, you can mix
old CUPS and new kernels or vice versa.

Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-10-12 14:54:58 -07:00
Alan Stern
74da5d68a5 USB: cdc-acm: fix sysfs attribute registration bug
This patch (as950) fixes a bug in the cdc-acm driver.  It doesn't keep
track of which interface (control or data) the sysfs attributes get
registered for, and as a result, during disconnect it will sometimes
attempt to remove the attributes from the wrong interface.  The
left-over attributes can cause a crash later on, particularly if the driver
module has been unloaded.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Oliver Neukum <oneukum@suse.de>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-08-22 14:27:43 -07:00
Greg Kroah-Hartman
18ac301605 USB: class: usblp: clean up urb->status usage
This done in anticipation of removal of urb->status, which will make
that patch easier to review and apply in the future.

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-07-19 17:46:06 -07:00
Greg Kroah-Hartman
185d40587d USB: class: cdc-acm: clean up urb->status usage
This done in anticipation of removal of urb->status, which will make
that patch easier to review and apply in the future.

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-07-19 17:46:06 -07:00