This should let us get rid of all of the different hooks in the USB core for
when something has changed.
Also, some other parts of the kernel have wanted to know this kind of
information at times.
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This patch (as582) adds a missing transfer_flags setting to the usbtest
driver.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Add .owner initialisation to the device drivers
in drivers/usb/host so that when built as module
the device_driver refers to the owning module
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Ensure the the device_driver and usb_gadget_driver
have their .owner fields initialised to associate
the module owner to the driver.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Initialise the .owner field of the driver with
the module that owns it, to aid in linking
drivers to modules.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
When a USB device is put into suspend mode, the current drawn from VBUS
has to be less than 500 uA. Some transceivers need to be put into a
special power-saving mode to accomplish this, and won't have a separate
OTG driver handling that.
This adds a suspend method to the "otg_transceiver" struct -- misnamed,
it's not only for OTG -- and calls it from the OMAP UDC driver.
Signed-off-by: Juha Yrj?l? <juha.yrjola@nokia.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This patch (as581) changes the assignments to hcd->state in the uhci-hcd
driver. It fixes part of bugzilla entry #5227. The problem was revealed
by David's large suite of USB suspend/resume patches; this patch should go
to Linus at the same time those do.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
The change to make DMA work two bytes at a time omitted an important
tweak that affects the file_storage gadget: it needs to recognize when
the host writes an odd number of bytes. (The network layer ignores
such extra bytes.)
This patch resolves that issue by checking the relevant bit and adjusting
the rx byte count, so that for example a legal 13 byte request doesn't
morph into an illegal 14 byte one any more.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
usb/core/buffer.c doesn't export any symbols, so it should use
!I instead of !E to eliminate this warning message:
Warning(/var/linsrc/linux-2614-rc4//drivers/usb/core/buffer.c): no structured comments found
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Just a small patch that fixes a small parameter validation bug.
drivers/usb/input/map_to_7segment.h:
This patch fixes the broken parameter validation in the char to seg7
conversion. This could cause out-of-bounds memory references.
MAINTAINERS:
Yealink maintainer info now in sorted order.
Documentation/input/yealink.txt:
Added a Q&A section that answers some common questions.
Signed-off-by: Henk <Henk.Vergonet@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
006491df1a13f85ad245d1039dfdf20e49c394fd
The uhci-hcd driver is fairly lax about the way it handles isochronous
transfers. This patch (as579) improves it in three respects:
TDs for a new URB aren't added to the schedule until all of
them have been allocated. This way there's no risk of the
controller executing some of them when an allocation fails.
TDs for an unlinked URB are removed from the schedule as soon
as the URB is unlinked, rather than waiting until the URB is
given back. This way there's no risk of the controller still
executing a TD after the URB completes.
The urb->error_count values are now reported correctly.
Although since they aren't used in any drivers except for
debug messages in the system log, probably nobody cares.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This patch (as580) is perhaps the only result from the long discussion I
had with David about his changes to the root-hub suspend/resume code. It
renames the hub_suspend and hub_resume methods in struct usb_hcd to
bus_suspend and bus_resume. These are more descriptive names, since the
methods really do suspend or resume an entire USB bus, and less likely to
be confused with the hub_suspend and hub_resume routines in hub.c.
It also takes David's advice about removing the layer of bus glue, where
those methods are called. And it implements a related change that David
made to the other HCDs but forgot to put into dummy_hcd.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This patch (as574) updates the PCI BIOS usb-handoff code for UHCI
controllers, making it work like the reset routines in uhci-hcd. This
allows uhci-hcd to drop its own routines in favor of the new ones
(code-sharing).
Once the patch is merged we can turn the usb-handoff option on
permanently, as far as UHCI is concerned. OHCI and EHCI may still have
some issues.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This patch (as575) fixes an unlikely race in the g_file_storage driver.
The problem can occur only when the driver is unbound before its
initialization routine has finished.
I also took the opportunity to replace kmalloc/memset with kzalloc.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This adds US_FL_FIX_CAPACITY for yet _another_ entire block of Apple
productIds. They really can't seem to get this right. This one is for
the iPod Nano. Reported by Tyson Vinson <lornoss@gmail.com>.
Signed-off-by: Phil Dibowitz <phil@ipom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/usb/storage/unusual_devs.h | 10 ++++++++++
1 file changed, 10 insertions(+)
This patch adds the US_FL_IGNORE_RESIDUE flag for the TrekStor i.Beat
Joy 2.0. Original version of this patch was sent by Stefan Werner
<dustbln@gmx.de> with test/rediff/etc. by me.
Signed-off-by: Phil Dibowitz <phil@ipom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/usb/storage/unusual_devs.h | 7 +++++++
1 file changed, 7 insertions(+)
A while ago, Matthew Dharm wrote:
> Looks good. Tho, I would like to see a future patch to do two things:
> 1) Change comments from C++ style to C-style
> 2) Make sure we're naming consistently everywhere SCM, USBAT,
> USBAT-02 (most noticably needing fixing is the string used at
> transport-selection time, but a sweep of all uses to be consistent
> would be in order).
Sorry for the long delay, here is a patch to address this. I also clarified
some ATA/ATAPI wording + function names.
Signed-off-by: Daniel Drake <dsd@gentoo.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/usb/storage/shuttle_usbat.c | 306 ++++++++++++++++++++----------------
drivers/usb/storage/shuttle_usbat.h | 66 +++----
drivers/usb/storage/transport.h | 2
drivers/usb/storage/unusual_devs.h | 10 -
drivers/usb/storage/usb.c | 4
5 files changed, 213 insertions(+), 175 deletions(-)
There appears to be one more case where the HP8200 CD writer devices are
detected as flash readers - when the USB cable is replugged after use, with
the power cable still connected.
Oddly enough, the identify device command appears to 'fall through' when the
devices are in this state, the status register reading exactly the same opcode
as the command (0xA1) that was just executed.
I think it's safe to label this behaviour as specific to HP8200 devices, I
can't get the flash devices to respond like this.
This patch should solve the last of the HP8200 issues which have cropped up
recently.
Signed-off-by: Daniel Drake <dsd@gentoo.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/usb/storage/shuttle_usbat.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
the following patch splits the NOTE: in the Device Drivers->USB submenu of
Kconfig thus making the whole of it readable on 600x800 terminals.
(Otherwise, the line was too big and disappeared into nowhere.)
Signed-off-by: Borislav Petkov <petkov@uni-muenster.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/usb/storage/Kconfig | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
This one is a tiny patch adding one more device to the list. Please
apply. :)
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/usb/net/pegasus.h | 2 ++
1 file changed, 2 insertions(+)
We would like to add a PID for the Pyramid Appliance Display, which works
on USB via FTDI_SIO.
Signed-off-by: Thomas Riewe <thomasr@pyramid.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/usb/serial/ftdi_sio.c | 1 +
drivers/usb/serial/ftdi_sio.h | 3 +++
2 files changed, 4 insertions(+)
Also has the nice benefit of making sparc alignment issues go away.
Thanks to David Miller for pointing out the problems here.
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/usb/core/hub.c | 22 ++++++++++++----------
drivers/usb/core/hub.h | 2 +-
2 files changed, 13 insertions(+), 11 deletions(-)
This patch (as566) converts the File-Storage gadget over to the kthread
API. The new code doesn't use kthread_stop because the control thread
needs to terminate asynchronously when it receives a signal.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/usb/gadget/file_storage.c | 32 +++++++++++++-------------------
1 file changed, 13 insertions(+), 19 deletions(-)
This patch (as570) changes some comments in the uhci-hcd header file and
removes an unused declaration (something I forgot to erase in an earlier
patch).
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/usb/host/uhci-hcd.h | 91 +++++++++++++++++++++++---------------------
1 file changed, 49 insertions(+), 42 deletions(-)
Because there is no bulk_interrupt_message() routine and no
USBDEVFS_INTERRUPT ioctl, people have been forced to abuse the
usb_bulk_message() routine and USBDEVFS_BULK by using them for interrupt
transfers as well as bulk transfers.
This patch (as567) formalizes this practice and adds code to
usb_bulk_message() for detecting when the target is really an interrupt
endpoint. If it is, the routine submits an interrupt URB (using the
default interval) instead of a bulk URB. In theory this should help HCDs
that don't like it when people try to mix transfer types, queuing both
periodic and non-periodic types for the same endpoint.
Not fully tested -- I don't have any programs that use USBDEVFS_BULK for
interrupt transfers -- but it compiles okay and normal bulk messages work
as well as before.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/usb/core/message.c | 24 ++++++++++++++++++++----
1 file changed, 20 insertions(+), 4 deletions(-)
Reject URBs to _all_ devices when their host controllers are suspended;
even root hub registers will be unavailable. Also, don't reject urbs
to root hubs in other cases; the only upstream link is through that
controller (on PCI or whatever SOC bus is in use).
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/usb/core/hcd.c | 28 ++++++++++++----------------
drivers/usb/core/urb.c | 3 ++-
2 files changed, 14 insertions(+), 17 deletions(-)
The way we're looking at USB suspend lately doesn't expect drivers to
call usb_suspend_device() or usb_resume_device() directly; that'll
be implicit when no interfaces are in use.
This patch removes those APIs from visibility outside usbcore.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
drivers/usb/core/hub.c | 12 ++++--------
drivers/usb/core/usb.h | 4 ++++
include/linux/usb.h | 5 -----
3 files changed, 8 insertions(+), 13 deletions(-)
This makes the isp116x driver stop using usb_suspend_device() and
usb_resume_device() ... usbcore now calls to the root hub methods,
removing the need for this. It also switches from keventd to khubd
for remote wakeup. (Compile tested.)
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/usb/host/isp116x-hcd.c | 29 ++++-------------------------
drivers/usb/host/isp116x.h | 1 -
2 files changed, 4 insertions(+), 26 deletions(-)
The PCI "early usb handoff" quirk logic didn't work like "ohci-hcd" ...
This patch makes it do so by:
- Resetting the controller after kicking BIOS off, matching the
normal "chip in hardware reset" startup mode;
- Reporting any BIOS that borks this simple handoff; it's likely
got a few other surprises for us too.
- Ignoring that handoff on HPPA;
The diagnostic string is mostly shared with EHCI, saving a few bytes.
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/usb/host/pci-quirks.c | 22 ++++++++++++++++++----
1 file changed, 18 insertions(+), 4 deletions(-)
This simplifies the OHCI root hub suspend logic:
- Uses new usbcore root hub calls to make autosuspend work again:
* Uses a newish usbcore root hub wakeup mechanism,
making requests to khubd not keventd.
* Uses an even newer sibling suspend hook.
- Expect someone always made usbcore call ohci_hub_suspend() before bus
glue fires; and that ohci_hub_resume() is only called after that bus
glue ran. Previously, only CONFIG_USB_SUSPEND promised those things.
(Includes updates to PCI and OMAP bus glue.)
- Handle a not-noticed-before special case during resume from one of
the swsusp snapshots when using "usb-handoff": the controller isn't
left in RESET state. (A bug to fix in the usb-handoff code...)
Also cleans up a minor debug printk glitch, and switches an mdelay over
to an msleep (how did that stick around for so long?).
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/usb/host/ohci-dbg.c | 4 ----
drivers/usb/host/ohci-hcd.c | 2 +-
drivers/usb/host/ohci-hub.c | 42 ++++++++++++------------------------------
drivers/usb/host/ohci-mem.c | 1 -
drivers/usb/host/ohci-omap.c | 36 ++++++++++++------------------------
drivers/usb/host/ohci-pci.c | 40 ++++++++--------------------------------
drivers/usb/host/ohci.h | 1 -
7 files changed, 33 insertions(+), 93 deletions(-)
This updates the PCI glue to address the new and simplified usbcore suspend
semantics, where CONFIG_USB_SUSPEND becomes irrelevant to HCDs because
hcd->hub_suspend() will always be called.
- Removes now-unneeded recursion support
- Go back to ignoring faults reported by the wakeup calls; we expect them
to fail sometimes, and that's just fine.
The PCI HCDs will need simple changes to catch up to this, like being able
to ignore the setting of CONFIG_USB_SUSPEND.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/usb/core/hcd-pci.c | 106 +++++++++++++++++++++------------------------
drivers/usb/core/hcd.h | 6 +-
2 files changed, 53 insertions(+), 59 deletions(-)
This patch associates hub suspend and resume logic (including for root hubs)
with CONFIG_PM -- instead of CONFIG_USB_SUSPEND as before -- thereby unifying
two troublesome versions of suspend logic into just one. It'll be easier to
keep things right from now on.
- Now usbcore _always_ calls hcd->hub_suspend as needed, instead of
only when USB_SUSPEND is enabled:
* Those root hub methods are now called from hub suspend/resume;
no more skipping between layers during device suspend/resume;
* It now handles cases allowed by sysfs or autosuspended root hubs,
by forcing the hub interface to resume too.
- All devices, including virtual root hubs, now get the same treatment
on their resume paths ... including re-activating all their interfaces.
Plus it gets rid of those stub copies of usb_{suspend,resume}_device(), and
updates the Kconfig to match the new definition of USB_SUSPEND: it provides
(a) selective suspend, downstream from hubs; and (b) remote wakeup, upstream
from any device configuration which supports it.
This calls for minor followup patches for most HCDs (and their PCI glue).
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/usb/core/Kconfig | 11 ++-
drivers/usb/core/hub.c | 163 +++++++++++++++++++++++++----------------------
2 files changed, 97 insertions(+), 77 deletions(-)
This patch collects various small updates related to root hubs, to shrink
later patches which build on them.
- For root hub suspend/resume support:
* Make the existing usb_hcd_resume_root_hub() routine respect pmcore
locking, exporting and using the dpm_runtime_resume() method.
* Add a new usb_hcd_suspend_root_hub() to pair with that routine.
(Essential to make OHCI autosuspend behave again...)
* HC_SUSPENDED by itself only refers to the root hub's downstream ports.
So let HCDs see root hub URBs unless the parent device is suspended.
- Remove an assertion we no longer need (and now, also don't want).
- Generic suspend/resume updates to work better with swsusp.
* Ignore the FREEZE vs SUSPEND distinction for hardware; trying to
use it breaks the swsusp snapshots it's supposed to help (sigh).
* On resume, mark devices as resumed right away, but then
do nothing else if the device is marked NOTATTACHED.
These changes shouldn't be very noticable by themselves.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/base/power/runtime.c | 1
drivers/usb/core/hcd.c | 64 ++++++++++++++++++++++++++++++++++++++-----
drivers/usb/core/hcd.h | 1
drivers/usb/core/hub.c | 45 ++++++++++++++++++++++++------
drivers/usb/core/usb.c | 20 +++++++++----
drivers/usb/core/usb.h | 1
6 files changed, 111 insertions(+), 21 deletions(-)
This cleans up a small recent FIXME, ensuring that all the HCDs provide
root hub suspend/resume methods. It also wraps the calls to those root
suspend routines just like on the PCI "USB_SUSPEND not defined" cases,
so non-PCI bus glue won't be as tempted to behave very differently.
Several of the SOC based OHCI drivers forgot to list those methods;
the patch also adds those missing declarations.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/usb/core/hcd.c | 42 +++++++++++++++++++++++++---------------
drivers/usb/host/ohci-au1xxx.c | 5 ++++
drivers/usb/host/ohci-lh7a404.c | 5 ++++
drivers/usb/host/ohci-pxa27x.c | 1
drivers/usb/host/ohci-s3c2410.c | 1
drivers/usb/host/ohci-sa1111.c | 1
6 files changed, 40 insertions(+), 15 deletions(-)
This splits BIOS and PCI specific support out of ehci-hcd.c into
ehci-pci.c. It follows the model already used in the OHCI driver
so support for non-PCI EHCI controllers can be more easily added.
Signed-off-by: Matt Porter <mporter@kernel.crashing.org>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/usb/host/ehci-hcd.c | 543 ++++++--------------------------------------
drivers/usb/host/ehci-pci.c | 414 +++++++++++++++++++++++++++++++++
drivers/usb/host/ehci.h | 1
3 files changed, 492 insertions(+), 466 deletions(-)
This saves a word from "struct device" ... there's a refcounting mechanism
stub that's rather ineffective (the values are never even tested!), which
can safely be deleted. With this patch it uses normal device refcounting,
so any potential users of the pm_parent mechanism will be more correct.
(That mechanism is actually unusable for now though; it does nothing.)
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/base/power/main.c | 26 +++-----------------------
include/linux/pm.h | 1 -
2 files changed, 3 insertions(+), 24 deletions(-)
This patch (as563) splits the physical and logical framelist arrays in
uhci-hcd into two separate pieces. This will allow slightly better memory
utilization, since each piece is no larger than a single page whereas
before the whole thing was a little bigger than two pages. It also allows
the logical array to be allocated in non-DMA-coherent memory.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This patch (as562) removes from the uhci-hcd driver a few unused fields
and some unnecessary tests against NULL and assignments to NULL. In fact
it wasn't until fairly recently that the tests became unnecessary.
Before last winter it was possible that the driver's stop() routine would
get called even if the start() routine returned an error, but now that
can't happen. Hence there's no longer any need to check for partial
initialization.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This simplifies some of the PM-related #ifdeffing by recognizing
that USB_SUSPEND depends on PM. Also, OHCI drivers were often
testing for USB_SUSPEND when they should have tested just PM.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/usb/core/hcd.c | 2 ++
drivers/usb/host/ohci-hcd.c | 2 +-
drivers/usb/host/ohci-hub.c | 4 ++--
drivers/usb/host/ohci-omap.c | 2 +-
drivers/usb/host/ohci-pci.c | 2 +-
drivers/usb/host/ohci-ppc-soc.c | 4 ++--
drivers/usb/host/ohci-pxa27x.c | 2 +-
drivers/usb/host/ohci-s3c2410.c | 3 +--
drivers/usb/host/ohci-sa1111.c | 2 +-
9 files changed, 12 insertions(+), 11 deletions(-)
This gets rid of some inconsistently duplicated logic to resume interfaces.
Similar code was in both finish_port_resume() and in usb_generic_resume().
Now there is just one copy of that code, accessed regardless of whether
CONFIG_USB_SUSPEND is enabled. Fault handling is also more consistent.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This patch removes the extra usb_suspend_device() parameter. The original
reason to pass that parameter was so that this routine could suspend any
active children. A previous patch removed that functionality ... leaving
no reason to pass the parameter. A close analogy is pci_set_power_state,
which doesn't need a pm_message_t either.
On the internal code path that comes through the driver model, the parameter
is now used to distinguish cases where USB devices need to "freeze" but not
suspend. It also checks for an error case that's accessible through sysfs:
attempting to suspend a device before its interfaces (or for hubs, ports).
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/usb/core/hub.c | 34 +++++++++++++++++++++-------------
drivers/usb/core/usb.c | 23 +++++++++++++++++++++--
drivers/usb/host/ehci-hcd.c | 2 +-
drivers/usb/host/isp116x-hcd.c | 2 +-
drivers/usb/host/ohci-pci.c | 2 +-
include/linux/usb.h | 2 +-
6 files changed, 46 insertions(+), 19 deletions(-)
This patch removes some recursion in the CONFIG_USB_SUSPEND logic, which
suspended children (of devices or hubs) that weren't already suspended.
When it sees such cases, suspend now just fails cleanly.
That logic was not needed during system-wide sleep state transitions; and
given the current notions of how to manage selective suspend transitions,
we don't want it there either. Where it was particularly handy was coping
with various limitations of the sysfs "echo -n N > power/state" support.
(These include assuming that "N" is always meaningful to the driver; and
that drivers can only transition to state N from state zero.)
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This updates the handling of power state for USB interfaces.
- Formalizes an existing invariant: interface "power state" is a boolean:
ON when I/O is allowed, and FREEZE otherwise. It does so by defining
some inlined helpers, then using them.
- Adds a useful invariant: the only interfaces marked active are those
bound to non-suspended drivers. Later patches build on this invariant.
- Simplifies the interface driver API (and removes some error paths) by
removing the requirement that they record power state changes during
suspend and resume callbacks. Now usbcore does that.
A few drivers were simplified to address that last change.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/usb/core/hub.c | 33 +++++++++------------
drivers/usb/core/message.c | 1
drivers/usb/core/usb.c | 65 +++++++++++++++++++++++++++++++++----------
drivers/usb/core/usb.h | 18 +++++++++++
drivers/usb/input/hid-core.c | 2 -
drivers/usb/misc/usbtest.c | 10 ------
drivers/usb/net/pegasus.c | 2 -
drivers/usb/net/usbnet.c | 2 -
8 files changed, 85 insertions(+), 48 deletions(-)
