slot can be controlled by user-space, hence leading to
a potential exploitation of the Spectre variant 1 vulnerability,
as warned by smatch:
drivers/media/dvb-core/dvb_ca_en50221.c:1479 dvb_ca_en50221_io_write() warn: potential spectre issue 'ca->slot_info' (local cap)
Acked-by: "Jasmin J." <jasmin@anw.at>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
A successful CA module initialisation isn't an error. Change the
log print to info severity accordingly.
Cc: Jasmin Jessich <jasmin@anw.at>
Signed-off-by: Daniel Scheller <d.scheller@gmx.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This is the mindless scripted replacement of kernel use of POLL*
variables as described by Al, done by this script:
for V in IN OUT PRI ERR RDNORM RDBAND WRNORM WRBAND HUP RDHUP NVAL MSG; do
L=`git grep -l -w POLL$V | grep -v '^t' | grep -v /um/ | grep -v '^sa' | grep -v '/poll.h$'|grep -v '^D'`
for f in $L; do sed -i "-es/^\([^\"]*\)\(\<POLL$V\>\)/\\1E\\2/" $f; done
done
with de-mangling cleanups yet to come.
NOTE! On almost all architectures, the EPOLL* constants have the same
values as the POLL* constants do. But they keyword here is "almost".
For various bad reasons they aren't the same, and epoll() doesn't
actually work quite correctly in some cases due to this on Sparc et al.
The next patch from Al will sort out the final differences, and we
should be all done.
Scripted-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Merge tag 'media/v4.16-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
Pull media updates from Mauro Carvalho Chehab:
- videobuf2 was moved to a media/common dir, as it is now used by the
DVB subsystem too
- Digital TV core memory mapped support interface
- new sensor driver: ov7740
- several improvements at ddbridge driver
- new V4L2 driver: IPU3 CIO2 CSI-2 receiver unit, found on some Intel
SoCs
- new tuner driver: tda18250
- finally got rid of all LIRC staging drivers
- as we don't have old lirc drivers anymore, restruct the lirc device
code
- add support for UVC metadata
- add a new staging driver for NVIDIA Tegra Video Decoder Engine
- DVB kAPI headers moved to include/media
- synchronize the kAPI and uAPI for the DVB subsystem, removing the gap
for non-legacy APIs
- reduce the kAPI gap for V4L2
- lots of other driver enhancements, cleanups, etc.
* tag 'media/v4.16-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (407 commits)
media: v4l2-compat-ioctl32.c: make ctrl_is_pointer work for subdevs
media: v4l2-compat-ioctl32.c: refactor compat ioctl32 logic
media: v4l2-compat-ioctl32.c: don't copy back the result for certain errors
media: v4l2-compat-ioctl32.c: drop pr_info for unknown buffer type
media: v4l2-compat-ioctl32.c: copy clip list in put_v4l2_window32
media: v4l2-compat-ioctl32.c: fix ctrl_is_pointer
media: v4l2-compat-ioctl32.c: copy m.userptr in put_v4l2_plane32
media: v4l2-compat-ioctl32.c: avoid sizeof(type)
media: v4l2-compat-ioctl32.c: move 'helper' functions to __get/put_v4l2_format32
media: v4l2-compat-ioctl32.c: fix the indentation
media: v4l2-compat-ioctl32.c: add missing VIDIOC_PREPARE_BUF
media: v4l2-ioctl.c: don't copy back the result for -ENOTTY
media: v4l2-ioctl.c: use check_fmt for enum/g/s/try_fmt
media: vivid: fix module load error when enabling fb and no_error_inj=1
media: dvb_demux: improve debug messages
media: dvb_demux: Better handle discontinuity errors
media: cxusb, dib0700: ignore XC2028_I2C_FLUSH
media: ts2020: avoid integer overflows on 32 bit machines
media: i2c: ov7740: use gpio/consumer.h instead of gpio.h
media: entity: Add a nop variant of media_entity_cleanup
...
Pull poll annotations from Al Viro:
"This introduces a __bitwise type for POLL### bitmap, and propagates
the annotations through the tree. Most of that stuff is as simple as
'make ->poll() instances return __poll_t and do the same to local
variables used to hold the future return value'.
Some of the obvious brainos found in process are fixed (e.g. POLLIN
misspelled as POLL_IN). At that point the amount of sparse warnings is
low and most of them are for genuine bugs - e.g. ->poll() instance
deciding to return -EINVAL instead of a bitmap. I hadn't touched those
in this series - it's large enough as it is.
Another problem it has caught was eventpoll() ABI mess; select.c and
eventpoll.c assumed that corresponding POLL### and EPOLL### were
equal. That's true for some, but not all of them - EPOLL### are
arch-independent, but POLL### are not.
The last commit in this series separates userland POLL### values from
the (now arch-independent) kernel-side ones, converting between them
in the few places where they are copied to/from userland. AFAICS, this
is the least disruptive fix preserving poll(2) ABI and making epoll()
work on all architectures.
As it is, it's simply broken on sparc - try to give it EPOLLWRNORM and
it will trigger only on what would've triggered EPOLLWRBAND on other
architectures. EPOLLWRBAND and EPOLLRDHUP, OTOH, are never triggered
at all on sparc. With this patch they should work consistently on all
architectures"
* 'misc.poll' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (37 commits)
make kernel-side POLL... arch-independent
eventpoll: no need to mask the result of epi_item_poll() again
eventpoll: constify struct epoll_event pointers
debugging printk in sg_poll() uses %x to print POLL... bitmap
annotate poll(2) guts
9p: untangle ->poll() mess
->si_band gets POLL... bitmap stored into a user-visible long field
ring_buffer_poll_wait() return value used as return value of ->poll()
the rest of drivers/*: annotate ->poll() instances
media: annotate ->poll() instances
fs: annotate ->poll() instances
ipc, kernel, mm: annotate ->poll() instances
net: annotate ->poll() instances
apparmor: annotate ->poll() instances
tomoyo: annotate ->poll() instances
sound: annotate ->poll() instances
acpi: annotate ->poll() instances
crypto: annotate ->poll() instances
block: annotate ->poll() instances
x86: annotate ->poll() instances
...
On several places, whitespaces are being used for indentation,
or even at the end of the line.
Fix them.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Currently a user can pass in an unsanitized slot number which
will lead to and out of range index into ca->slot_info. Fix this
by checking that the slot number is no more than the allowed
maximum number of slots. Seems that this bug has been in the driver
forever.
Detected by CoverityScan, CID#139381 ("Untrusted pointer read")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Jasmin Jessich <jasmin@anw.at>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Building the driver with gcc 7.2.1 and:
make ARCH=i386 CF=-D__CHECK_ENDIAN__ CONFIG_DEBUG_SECTION_MISMATCH=y W=1 CHECK='' M=drivers/media
now produces a lot of warnings:
drivers/media/dvb-core/dvb_ca_en50221.c:233: warning: No description found for parameter 'ca'
drivers/media/dvb-core/dvb_ca_en50221.c:233: warning: No description found for parameter 'slot'
drivers/media/dvb-core/dvb_ca_en50221.c:284: warning: No description found for parameter 'timeout_hz'
drivers/media/dvb-core/dvb_ca_en50221.c:284: warning: Excess function parameter 'timeout_ms' description in 'dvb_ca_en50221_wait_if_status'
drivers/media/dvb-core/dvb_ca_en50221.c:409: warning: No description found for parameter 'tuple_type'
drivers/media/dvb-core/dvb_ca_en50221.c:409: warning: No description found for parameter 'tuple_length'
drivers/media/dvb-core/dvb_ca_en50221.c:409: warning: Excess function parameter 'tupleType' description in 'dvb_ca_en50221_read_tuple'
drivers/media/dvb-core/dvb_ca_en50221.c:409: warning: Excess function parameter 'tupleLength' description in 'dvb_ca_en50221_read_tuple'
drivers/media/dvb-core/dvb_ca_en50221.c:795: warning: No description found for parameter 'buf'
drivers/media/dvb-core/dvb_ca_en50221.c:795: warning: No description found for parameter 'bytes_write'
drivers/media/dvb-core/dvb_ca_en50221.c:795: warning: Excess function parameter 'ebuf' description in 'dvb_ca_en50221_write_data'
drivers/media/dvb-core/dvb_ca_en50221.c:795: warning: Excess function parameter 'count' description in 'dvb_ca_en50221_write_data'
drivers/media/dvb-core/dvb_ca_en50221.c:942: warning: No description found for parameter 'pubca'
drivers/media/dvb-core/dvb_ca_en50221.c:942: warning: Excess function parameter 'ca' description in 'dvb_ca_en50221_camchange_irq'
drivers/media/dvb-core/dvb_ca_en50221.c:970: warning: No description found for parameter 'pubca'
drivers/media/dvb-core/dvb_ca_en50221.c:970: warning: Excess function parameter 'ca' description in 'dvb_ca_en50221_camready_irq'
drivers/media/dvb-core/dvb_ca_en50221.c:990: warning: No description found for parameter 'pubca'
drivers/media/dvb-core/dvb_ca_en50221.c:990: warning: Excess function parameter 'ca' description in 'dvb_ca_en50221_frda_irq'
drivers/media/dvb-core/dvb_ca_en50221.c:1304: warning: No description found for parameter 'data'
drivers/media/dvb-core/dvb_ca_en50221.c:1348: warning: No description found for parameter 'parg'
drivers/media/dvb-core/dvb_ca_en50221.c:1348: warning: Excess function parameter 'inode' description in 'dvb_ca_en50221_io_do_ioctl'
drivers/media/dvb-core/dvb_ca_en50221.c:1348: warning: Excess function parameter 'arg' description in 'dvb_ca_en50221_io_do_ioctl'
drivers/media/dvb-core/dvb_ca_en50221.c:1432: warning: Excess function parameter 'inode' description in 'dvb_ca_en50221_io_ioctl'
drivers/media/dvb-core/dvb_ca_en50221.c:1544: warning: No description found for parameter 'ca'
drivers/media/dvb-core/dvb_ca_en50221.c:1544: warning: No description found for parameter 'result'
drivers/media/dvb-core/dvb_ca_en50221.c:1544: warning: No description found for parameter '_slot'
drivers/media/dvb-core/dvb_ca_en50221.c:1849: warning: No description found for parameter 'pubca'
drivers/media/dvb-core/dvb_ca_en50221.c:1849: warning: Excess function parameter 'ca' description in 'dvb_ca_en50221_init'
drivers/media/dvb-core/dvb_ca_en50221.c:1936: warning: No description found for parameter 'pubca'
drivers/media/dvb-core/dvb_ca_en50221.c:1936: warning: Excess function parameter 'ca_dev' description in 'dvb_ca_en50221_release'
drivers/media/dvb-core/dvb_ca_en50221.c:1936: warning: Excess function parameter 'ca' description in 'dvb_ca_en50221_release'
Trivially fix them.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
- Running "checkpatch.pl -strict -f ..." gave more checks to fix.
* Blank lines aren't necessary after an open brace '{'
* Comparison to NULL written as "!<var>"
* CHECK: Blank lines aren't necessary before a close brace '}'
Signed-off-by: Jasmin Jessich <jasmin@anw.at>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Some EXPORT_SYMBOL() on this file don't match the name of functions
that precedes them.
Signed-off-by: Jasmin Jessich <jasmin@anw.at>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Fixed most of:
WARNING: line over 80 characters
The remaining lines are printk strings, which should not be split and
lines where I thing they should stay as they are.
Signed-off-by: Jasmin Jessich <jasmin@anw.at>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
- The STATUSREG_TXERR definition is not used and it has style
problems, too. Removing it seems to solve both issues.
Signed-off-by: Jasmin Jessich <jasmin@anw.at>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Used a helper variable "struct dvb_ca_slot *sl" instead of
"ca->slot_info[slot]". This reduces the line length and simplifies
code reading.
Fixed also "-strict" checks in this patch:
- Comparison to NULL written as "!<var>".
Signed-off-by: Jasmin Jessich <jasmin@anw.at>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Fixed all:
ERROR: do not use assignment in if condition
Fixed also "-strict" checks in this patch:
- Changed "if (ret != 0)" to "if (ret)".
- Camel case variables have been converted to kernel_case.
- Comparison to NULL written as "!<var>".
- No space is necessary after a cast.
Signed-off-by: Jasmin Jessich <jasmin@anw.at>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Fixed all:
WARNING: msleep < 20ms can sleep for up to 20ms
by using usleep_range.
Signed-off-by: Jasmin Jessich <jasmin@anw.at>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
The CAM poll code for the budget-av is exactly the same on several
places. Extracting the code to a new function improves maintainability.
Signed-off-by: Jasmin Jessich <jasmin@anw.at>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Refactored "dvb_ca_en50221_thread" by moving the state machine into the
new function "dvb_ca_en50221_thread_state_machine". This reduces the
thread function size and reduces the structural complexity and of course
gives us more space to meet the line length goal in the new function.
Signed-off-by: Jasmin Jessich <jasmin@anw.at>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Some lower level drivers may work better when sending blocks of data
instead byte per byte. For this we need new function pointers in the
dvb_ca_en50221 protocol structure (read_data, write_data) and the protocol
needs to execute them, if they are defined.
Block data transmission is done in all states except LINKINIT.
Original code change by Ralph Metzler, modified by Jasmin Jessich and
Daniel Scheller to match Kernel code style.
Signed-off-by: Ralph Metzler <rjkm@metzlerbros.de>
Signed-off-by: Daniel Scheller <d.scheller@gmx.net>
Signed-off-by: Jasmin Jessich <jasmin@anw.at>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Some CAMs do a really slow initialization, which requires a longer timeout
for the first response.
Original code change by Ralph Metzler, modified by Jasmin Jessich to match
Kernel code style.
Signed-off-by: Ralph Metzler <rjkm@metzlerbros.de>
Signed-off-by: Jasmin Jessich <jasmin@anw.at>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
In case of a linkinit failure change to state UNINITIALISED to re-init
the CAM.
Original code change by Ralph Metzler, modified by Jasmin Jessich to match
Kernel code style.
Signed-off-by: Ralph Metzler <rjkm@metzlerbros.de>
Signed-off-by: Jasmin Jessich <jasmin@anw.at>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Some EXPORT_SYMBOL() on this file don't match the name of functions
that preceeds them.
Also, some kernel-doc markups also have a wrong name. Fix it.
Signed-off-by: Jasmin Jessich <jasmin@anw.at>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Make checkpatch happier by fixing this warning:
ERROR: "foo * bar" should be "foo *bar"
Signed-off-by: Jasmin Jessich <jasmin@anw.at>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
It started with a sporadic message in syslog: "CAM tried to send a
buffer larger than the ecount size" This message is not the fault
itself, but a consecutive fault, after a read error from the CAM. This
happens only on several CAMs, several hardware, and of course sporadic.
It is a consecutive fault, if the last read from the CAM did fail. I
guess this will not happen on all CAMs, but at least it did on mine.
There was a write error to the CAM and during the re-initialization
procedure, the CAM finished the last read, although it got a RS.
The write error to the CAM happened because a race condition between HC
write, checking DA and FR.
This patch added an additional check for DA(RE), just after checking FR.
It is important to read the CAMs status register again, to give the CAM
the necessary time for a proper reaction to HC. Please note the
description within the source code (patch below).
[mchehab@s-opensource.com: make checkpatch happy]
Signed-off-by: Jasmin jessich <jasmin@anw.at>
Tested-by: Ralph Metzler <rjkm@metzlerbros.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Fix up affected files that include this signal functionality via sched.h.
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Drop the FSF's postal address from the source code files that typically
contain mostly the license text. Of the 628 removed instances, 578 are
outdated.
The patch has been created with the following command without manual edits:
git grep -l "675 Mass Ave\|59 Temple Place\|51 Franklin St" -- \
drivers/media/ include/media|while read i; do i=$i perl -e '
open(F,"< $ENV{i}");
$a=join("", <F>);
$a =~ s/[ \t]*\*\n.*You should.*\n.*along with.*\n.*(\n.*USA.*$)?\n//m
&& $a =~ s/(^.*)Or, (point your browser to) /$1To obtain the license, $2\n$1/m;
close(F);
open(F, "> $ENV{i}");
print F $a;
close(F);'; done
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Commit da677fe143 ("[media] dvb-core/en50221: use kref to manage
struct dvb_ca_private") moved the dvb_unregister_device() call to the
kref callback, but that left lots of stale device state visible to
userspace (e.g. in sysfs). By using dvb_remove_device() and
dvb_free_device() instead of dvb_unregister_device(), we can avoid
that.
Signed-off-by: Max Kellermann <max.kellermann@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
The dvb-core directly calls printk() without using the modern
printk macros, or using the proper printk levels. Change it
to use pr_foo().
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Prepare for postponing the call until all file handles have been
closed.
[mchehab@osg.samsung.com: make checkpatch happy]
Signed-off-by: Max Kellermann <max@duempel.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
The Media Controller New Generation redefines the types for both
interfaces and entities to be used on DVB. Make the needed
changes at the DVB core for all interfaces, entities and
data and interface links to appear in the graph.
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
There are already some tags at dvb_ca_en50221.h, but using a
different format. Convert them, fix a few entries and add
to the device-drivers DocBook.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Acked-by: Jonathan Corbet <corbet@lwn.net>
The functions "dvb_unregister_device" and "kfree" could still be called
by the dvb_ca_en50221_init() function in the case that a previous resource
allocation failed.
* Corresponding details could be improved by adjustments for jump targets.
* Let us delete also an unnecessary check for the variable "ca" there.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
The dvb_unregister_device() function tests whether its argument is NULL
and then returns immediately. Thus the test around the call is not needed.
This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Prefix all DVB media controller entities with "dvb-" and use dash
instead of underline at the names.
Requested-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Make the dvb core CA support aware of the media controller and
register the corresponding devices.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
We recently pushed the locking down into this function, but there was
an error path where the unlock was missed.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Since most dvb ioctls wrap their real work with dvb_usercopy, the static mutex
used in dvb_usercopy effectively is a global lock for dvb ioctls.
Unfortunately, frontend ioctls can be blocked by the frontend thread for
several seconds; this leads to unacceptable lock contention. Mitigate that by
pushing the mutex from dvb_usercopy down to the individual, device specific
ioctls.
There are 10 such ioctl functions using dvb_usercopy, either calling it
directly, or via the trivial wrapper dvb_generic_ioctl. The following already
employ their own locking and look safe:
• dvb_demux_ioctl (as per dvb_demux_do_ioctl)
• dvb_dvr_ioctl (as per dvb_dvr_do_ioctl)
• dvb_osd_ioctl (as per single non-trivial callee)
• fdtv_ca_ioctl (as per callees)
• dvb_frontend_ioctl
The following functions do not, and are thus changed to use a device specific
mutex:
• dvb_net_ioctl (as per dvb_net_do_ioctl)
• dvb_ca_en50221_io_ioctl (as per dvb_ca_en50221_io_do_ioctl)
• dvb_video_ioctl
• dvb_audio_ioctl
• dvb_ca_ioctl
Signed-off-by: Nikolaus Schulz <schulz@macnetix.de>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
just like the V4L2 core, move the DVB core to drivers/media, as the
intention is to get rid of both "video" and "dvb" directories.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
