18 Apr, 2017
2 commits
-
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
Tested-by: Ralph Metzler
Signed-off-by: Mauro Carvalho Chehab -
The refcount field was added to the struct but it was not
properly documented.Document it.
[mchehab@s-opensource.com: fix a merge conflict]
Signed-off-by: Sakari Ailus
Signed-off-by: Mauro Carvalho Chehab
06 Apr, 2017
1 commit
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Changeset 1f862a68df24 ("[media] dvb_frontend: move kref to struct
dvb_frontend") added a kref to the struct dvb_frontend, but it
didn't document it.Fixes: 1f862a68df24 ("[media] dvb_frontend: move kref to struct dvb_frontend")
Signed-off-by: Mauro Carvalho Chehab
02 Mar, 2017
1 commit
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…hed.h> into <linux/sched/signal.h>
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>
28 Feb, 2017
1 commit
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Fix typos and add the following to the scripts/spelling.txt:
an user||a user
an userspace||a userspaceI also added "userspace" to the list since it is a common word in Linux.
I found some instances for "an userfaultfd", but I did not add it to the
list. I felt it is endless to find words that start with "user" such as
"userland" etc., so must draw a line somewhere.Link: http://lkml.kernel.org/r/1481573103-11329-4-git-send-email-yamada.masahiro@socionext.com
Signed-off-by: Masahiro Yamada
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
08 Feb, 2017
1 commit
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Adding Hama Hybrid DVB-T Stick support. Technically it's the same
device what Terratec Cinergy HT USB XE is.Signed-off-by: Piotr Oleszczyk
Signed-off-by: Mauro Carvalho Chehab
03 Feb, 2017
3 commits
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Fixed coding style issues of spacing
Signed-off-by: Devendra Sharma
Signed-off-by: Mauro Carvalho Chehab -
Drivers might try to access and run enable_source and disable_source
handlers when the driver that implements these handlers is clearing
the handlers during its unregister.Fix the following race condition:
process 1 process 2
request video streaming unbind au0828
v4l2 checks if tuner is free
... ...au0828_unregister_media_device()
... ...
(doesn't hold graph_mutex)
mdev->enable_source = NULL;
if (mdev && mdev->enable_source) mdev->disable_source = NULL;
mdev->enable_source()
(enable_source holds graph_mutex)As shown above enable_source check is done without holding the graph_mutex.
If unbind happens to be in progress, au0828 could clear enable_source and
disable_source handlers leading to null pointer de-reference.Fix it by protecting enable_source and disable_source set and clear and
protecting enable_source and disable_source handler access and the call
itself.process 1 process 2
request video streaming unbind au0828
v4l2 checks if tuner is free
... ...au0828_unregister_media_device()
... ...
(hold graph_mutex while clearing)
mdev->enable_source = NULL;
if (mdev) mdev->disable_source = NULL;
(hold graph_mutex to check and
call enable_source)
if (mdev->enable_source)
mdev->enable_source()If graph_mutex is held to just heck for handler being null and needs to be
released before calling the handler, there will be another window for the
handlers to be cleared. Hence, enable_source and disable_source handlers
no longer hold the graph_mutex and expect callers to hold it to avoid
forcing them release the graph_mutex before calling the handlers.Signed-off-by: Shuah Khan
Signed-off-by: Mauro Carvalho Chehab -
ZyDAS ZD1301 is chip having USB interface and DVB-T demodulator
integrated. This driver is for USB interface part.Device has USB ID 0ace:13a1. Used tuner is MT2060.
Signed-off-by: Antti Palosaari
Signed-off-by: Mauro Carvalho Chehab
27 Jan, 2017
1 commit
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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("", );
$a =~ s/[ \t]*\*\n.*You should.*\n.*along with.*\n.*(\n.*USA.*$)?\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 $a;
close(F);'; doneSigned-off-by: Sakari Ailus
27 Dec, 2016
1 commit
-
Linux 4.10-rc1
* tag 'v4.10-rc1': (11427 commits)
Linux 4.10-rc1
powerpc: Fix build warning on 32-bit PPC
avoid spurious "may be used uninitialized" warning
mm: add PageWaiters indicating tasks are waiting for a page bit
mm: Use owner_priv bit for PageSwapCache, valid when PageSwapBacked
ktime: Get rid of ktime_equal()
ktime: Cleanup ktime_set() usage
ktime: Get rid of the union
clocksource: Use a plain u64 instead of cycle_t
irqchip/armada-xp: Consolidate hotplug state space
irqchip/gic: Consolidate hotplug state space
coresight/etm3/4x: Consolidate hotplug state space
cpu/hotplug: Cleanup state names
cpu/hotplug: Remove obsolete cpu hotplug register/unregister functions
staging/lustre/libcfs: Convert to hotplug state machine
scsi/bnx2i: Convert to hotplug state machine
scsi/bnx2fc: Convert to hotplug state machine
cpu/hotplug: Prevent overwriting of callbacks
x86/msr: Remove bogus cleanup from the error path
bus: arm-ccn: Prevent hotplug callback leak
...
26 Dec, 2016
1 commit
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ktime_set(S,N) was required for the timespec storage type and is still
useful for situations where a Seconds and Nanoseconds part of a time value
needs to be converted. For anything where the Seconds argument is 0, this
is pointless and can be replaced with a simple assignment.Signed-off-by: Thomas Gleixner
Cc: Peter Zijlstra
25 Dec, 2016
1 commit
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This was entirely automated, using the script by Al:
PATT='^[[:blank:]]*#[[:blank:]]*include[[:blank:]]*'
sed -i -e "s!$PATT!#include !" \
$(git grep -l "$PATT"|grep -v ^include/linux/uaccess.h)to do the replacement at the end of the merge window.
Requested-by: Al Viro
Signed-off-by: Linus Torvalds
21 Dec, 2016
1 commit
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With gcc-5 or higher on x86, we can get a bogus warning in the
dvb-net code:drivers/media/dvb-core/dvb_net.c: In function 'dvb_net_ule':
arch/x86/include/asm/string_32.h:78:22: error: '*((void *)&dest_addr+4)' may be used uninitialized in this function [-Werror=maybe-uninitialized]The problem here is that gcc doesn't track all of the conditions
to prove it can't end up copying uninitialized data.
This changes the logic around so we zero out the destination
address earlier when we determine that it is not set here.
This allows the compiler to figure it out.Signed-off-by: Arnd Bergmann
Signed-off-by: Mauro Carvalho Chehab
15 Dec, 2016
1 commit
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* patchwork: (496 commits)
[media] v4l: tvp5150: Add missing break in set control handler
[media] v4l: tvp5150: Don't inline the tvp5150_selmux() function
[media] v4l: tvp5150: Compile tvp5150_link_setup out if !CONFIG_MEDIA_CONTROLLER
[media] em28xx: don't store usb_device at struct em28xx
[media] em28xx: use usb_interface for dev_foo() calls
[media] em28xx: don't change the device's name
[media] mn88472: fix chip id check on probe
[media] mn88473: fix chip id check on probe
[media] lirc: fix error paths in lirc_cdev_add()
[media] s5p-mfc: Add support for MFC v8 available in Exynos 5433 SoCs
[media] s5p-mfc: Rework clock handling
[media] s5p-mfc: Don't keep clock prepared all the time
[media] s5p-mfc: Kill all IS_ERR_OR_NULL in clocks management code
[media] s5p-mfc: Remove dead conditional code
[media] s5p-mfc: Ensure that clock is disabled before turning power off
[media] s5p-mfc: Remove special clock rate management
[media] s5p-mfc: Use printk_ratelimited for reporting ioctl errors
[media] s5p-mfc: Set DMA_ATTR_ALLOC_SINGLE_PAGES
[media] vivid: Set color_enc on HSV formats
[media] v4l2-tpg: Init hv_enc field with a valid value
...
25 Nov, 2016
2 commits
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This function is too big and too complex, making really hard
to understand what's there.Split it into sub-routines, in order to make it easier to be
understood, and to allow gcc to better parse it.As a bonus, it gets rid of a goto in the middle of a routine.
Signed-off-by: Mauro Carvalho Chehab
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The dvb_net code has a really complex function, meant to handle
DVB network packages: it is long, has several loops and ifs
inside, and even cause warnings with gcc5.Prepare it to be split into smaller functions by storing all
arguments and internal vars inside a struct.Signed-off-by: Mauro Carvalho Chehab
23 Nov, 2016
1 commit
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The current limit is too low for latest cards with 8+ tuners on a single slot.
IMHO, the most appropriate minimum default is 16.Signed-off-by: Буди Романто, AreMa Inc
Signed-off-by: Mauro Carvalho Chehab
19 Nov, 2016
8 commits
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While this patch sounded a good idea, unfortunately, it causes
bad dependencies, as drivers that would otherwise work without
the DVB core will now break:ERROR: "dvb_tuner_simple_release" [drivers/media/tuners/tea5767.ko] undefined!
ERROR: "dvb_tuner_simple_release" [drivers/media/tuners/tea5761.ko] undefined!
ERROR: "dvb_tuner_simple_release" [drivers/media/tuners/tda827x.ko] undefined!
ERROR: "dvb_tuner_simple_release" [drivers/media/tuners/tda18218.ko] undefined!
ERROR: "dvb_tuner_simple_release" [drivers/media/tuners/qt1010.ko] undefined!
ERROR: "dvb_tuner_simple_release" [drivers/media/tuners/mt2266.ko] undefined!
ERROR: "dvb_tuner_simple_release" [drivers/media/tuners/mt20xx.ko] undefined!
ERROR: "dvb_tuner_simple_release" [drivers/media/tuners/mt2060.ko] undefined!
ERROR: "dvb_tuner_simple_release" [drivers/media/tuners/mc44s803.ko] undefined!
ERROR: "dvb_tuner_simple_release" [drivers/media/tuners/fc0013.ko] undefined!
ERROR: "dvb_tuner_simple_release" [drivers/media/tuners/fc0012.ko] undefined!
ERROR: "dvb_tuner_simple_release" [drivers/media/tuners/fc0011.ko] undefined!So, we have to revert it.
Note: as the argument for the release ops changed from "int"
to "void", we needed to change it at the revert patch, to
avoid compilation issues like:
drivers/media/tuners/tea5767.c:437:23: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
.release = tea5767_release,
^~~~~~~~~~~~~~~This reverts commit 22a613e89825ea7a3984a968463cc6d425bd8856.
Signed-off-by: Mauro Carvalho Chehab
-
This commit amends my old commit fe35637b0a9f ("[media] dvb_frontend:
eliminate blocking wait in dvb_unregister_frontend()"), which added
kref to struct dvb_frontend_private. It turned out that there are
several use-after-free bugs left, which affect the struct
dvb_frontend. Protecting it with kref also protects struct
dvb_frontend_private, so we can simply move it.This is how the use-after-free looks like in KASAN:
BUG: KASAN: use-after-free in string+0x60/0xb1 at addr ffff880033bd9fc0
Read of size 1 by task kworker/0:2/617
CPU: 0 PID: 617 Comm: kworker/0:2 Not tainted 4.8.0-rc1-hosting+ #60
Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
Workqueue: usb_hub_wq hub_event
0000000000000000 ffff880033757218 ffffffff81394e50 ffff880033bd9fd0
ffff880035c03b00 ffff880033757240 ffffffff811f271d ffff880033bd9fc0
1ffff1000677b3f8 ffffed000677b3f8 ffff8800337572b8 ffffffff811f2afe
Call Trace:
[...]
[] vsnprintf+0x39d/0x7e9
[] add_uevent_var+0x10f/0x1dc
[] rc_dev_uevent+0x55/0x6f
[] dev_uevent+0x2e1/0x316
[] kobject_uevent_env+0x27e/0x701
[] kobject_uevent+0xb/0xd
[] device_del+0x322/0x383
[] rc_unregister_device+0x98/0xc3
[] dvb_usb_remote_exit+0x7a/0x90
[] dvb_usb_exit+0x1d/0xe5
[] dvb_usb_device_exit+0x69/0x7d
[] pctv452e_usb_disconnect+0x7b/0x80
[...]
Object at ffff880033bd9fc0, in cache kmalloc-16 size: 16
Allocated:
[...]
Freed:
PID = 617
[...]
[] kfree+0xd9/0x166
[] ir_free_table+0x2f/0x51
[] rc_unregister_device+0x4d/0xc3
[] dvb_usb_remote_exit+0x7a/0x90
[] dvb_usb_exit+0x1d/0xe5
[] dvb_usb_device_exit+0x69/0x7d
[] pctv452e_usb_disconnect+0x7b/0x80Another one:
BUG: KASAN: use-after-free in do_sys_poll+0x336/0x6b8 at addr ffff88003563fcc0
Read of size 8 by task tuner on fronte/1042
CPU: 1 PID: 1042 Comm: tuner on fronte Tainted: G B 4.8.0-rc1-hosting+ #60
Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
0000000000000000 ffff88003353f910 ffffffff81394e50 ffff88003563fd80
ffff880035c03200 ffff88003353f938 ffffffff811f271d ffff88003563fc80
1ffff10006ac7f98 ffffed0006ac7f98 ffff88003353f9b0 ffffffff811f2afe
Call Trace:
[...]
[] do_sys_poll+0x336/0x6b8
[...]
[] SyS_poll+0xa9/0x194
[...]
Object at ffff88003563fc80, in cache kmalloc-256 size: 256
Allocated:
[...]
Freed:
PID = 617
[...]
[] kfree+0xd9/0x166
[] dvb_unregister_device+0xd6/0xe5
[] dvb_unregister_frontend+0x4b/0x66
[] dvb_usb_adapter_frontend_exit+0x69/0xac
[] dvb_usb_exit+0x43/0xe5
[] dvb_usb_device_exit+0x69/0x7d
[] pctv452e_usb_disconnect+0x7b/0x80Signed-off-by: Max Kellermann
Signed-off-by: Mauro Carvalho Chehab -
Prepare for making "release" asynchronous (via kref). Some operations
may need to be run synchronously in dvb_frontend_detach(), and that's
why we need a "detach" callback.Signed-off-by: Max Kellermann
Signed-off-by: Mauro Carvalho Chehab -
This code duplication is confusing and error prone. Let's merge them
by moving the release/dvb_detach call into one function with oneSigned-off-by: Max Kellermann
Signed-off-by: Mauro Carvalho Chehab -
It is not clear what this return value means. All implemenations
return 0, and the one caller ignores the value. Let's remove this
useless return value completely.Signed-off-by: Max Kellermann
Signed-off-by: Mauro Carvalho Chehab -
Most release callback functions are identical: free the "tuner_priv"
and clear it. Let's eliminate some bloat by providing this simple
implementation in the dvb_frontend library.Signed-off-by: Max Kellermann
Signed-off-by: Mauro Carvalho Chehab -
Commit da677fe14364 ("[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
Signed-off-by: Mauro Carvalho Chehab -
dvb_unregister_device() has a major problem: it combines unregistering
with memory disposal. Sometimes, it is necessary to unregister a
device, but no memory can be freed yet, because a process still has a
(stale) file handle. Therefore, we need to split
dvb_unregister_device(). This will allow sanitizing a few callers.With my new design, dvb_unregister_device() appears misnamed, but to
reduce patch noise, I'm not renaming it just yet.Signed-off-by: Max Kellermann
Signed-off-by: Mauro Carvalho Chehab
16 Nov, 2016
1 commit
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Remove unneeded variables and assignments.
Signed-off-by: Masahiro Yamada
Signed-off-by: Hans Verkuil
Signed-off-by: Mauro Carvalho Chehab
25 Oct, 2016
1 commit
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TechnoTrend TT-connect S2-4650 CI seems to be a variation of
the DVBSky S960CI device.Signed-off-by: Olli Salonen
Signed-off-by: Mauro Carvalho Chehab
24 Oct, 2016
1 commit
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Add a new USB ID for EVOLVEO XtraTV stick.
[mchehab@s-opensource.org: fix patch and make checkpatch happy]
Cc: Antti Palosaari
Signed-off-by: Mauro Carvalho Chehab
21 Oct, 2016
6 commits
-
The dvb_filter.c can hardly be considered as part of the DVB
core. More than half of the code there is commented out by
av7110 and ttusb_dec.On the latter, just two small helper functions and a struct
definition is used.Being part of the core means that it would require an
amount of work to fix issues in it, like bad printk's
on it, and to document it on some future, like other kAPI
headers. It simply not worth the effort for something that
seems to be deprecated, as no new drivers use it.So, move it out of the core, by moving it to pci/ttpci
directory, where av7110 driver is kept, and copy the two
routines used by ttyusb_dec directly into its code.Signed-off-by: Mauro Carvalho Chehab
-
There is a provision at the dvb_demux.c to use a vmalloc'ed
circular buffer, enabled via an extra #ifdef option that it
is not at Kconfig. Enabling it will only make the Kernel to
allocate/deallocate such buffer, but no code would actually
use it. So, no practical effect, except for sparing some
memory without any good reason.So, get rid of such dead code.
Signed-off-by: Mauro Carvalho Chehab
-
There is a commented code that also detects packet loss.
Uncomment it and put into the DVB_DEMUX_SECTION_LOSS_LOG
debug Kconfig option.Signed-off-by: Mauro Carvalho Chehab
-
There are some ifdefs inside the dvb_demux that are meant to
enable advanced debug capabilities, at the cost of being very
verbose.Keeping those as internal ifdefs is a very bad idea, as it
doesn't make easy to check if the code there was broken by
some patch. So, let's add an explicit Kconfig option for it.Signed-off-by: Mauro Carvalho Chehab
-
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
-
Due to the 80-cols checkpatch warnings, several strings
were broken into multiple lines. This is not considered
a good practice anymore, as it makes harder to grep for
strings at the source code. So, join those continuation
lines.Signed-off-by: Mauro Carvalho Chehab
13 Oct, 2016
1 commit
-
With centralized MTU checking, there's nothing productive done by
eth_change_mtu that isn't already done in dev_set_mtu, so mark it as
deprecated and remove all usage of it in the kernel. All callers have been
audited for calls to alloc_etherdev* or ether_setup directly, which means
they all have a valid dev->min_mtu and dev->max_mtu. Now eth_change_mtu
prints out a netdev_warn about being deprecated, for the benefit of
out-of-tree drivers that might be utilizing it.Of note, dvb_net.c actually had dev->mtu = 4096, while using
eth_change_mtu, meaning that if you ever tried changing it's mtu, you
couldn't set it above 1500 anymore. It's now getting dev->max_mtu also set
to 4096 to remedy that.v2: fix up lantiq_etop, missed breakage due to drive not compiling on x86
CC: netdev@vger.kernel.org
Signed-off-by: Jarod Wilson
Signed-off-by: David S. Miller
22 Sep, 2016
1 commit
-
As warned by linuxdoc[1] tool, using:
$ for i in $(git grep kernel-doc Documentation/media/kapi/|cut -d: -f4); do kernel-lintdoc --sloppy $i; done
include/media/v4l2-dev.h:118 :WARN: function name from comment differs: v4l2_prio_close v4l2_prio_check
include/media/v4l2-mc.h:56 [kernel-doc WARN] : enum name from comment differs: if_vid_dec_index if_vid_dec_pad_index
include/media/v4l2-mc.h:71 [kernel-doc WARN] : enum name from comment differs: if_aud_dec_index if_aud_dec_pad_index
include/media/v4l2-mem2mem.h:396 [kernel-doc WARN] : function name from comment differs: v4l2_m2m_num_src_bufs_ready v4l2_m2m_num_dst_bufs_ready
drivers/media/dvb-core/dvb_math.h:28 [kernel-doc WARN] : function name from comment differs: cintlog2 intlog2
include/media/v4l2-subdev.h:215 [kernel-doc WARN] : struct name from comment differs: s_radio v4l2_subdev_tuner_ops
include/media/v4l2-subdev.h:890 [kernel-doc WARN] : function name from comment differs: v4l2_set_subdevdata v4l2_set_subdev_hostdata
include/media/v4l2-subdev.h:901 [kernel-doc WARN] : function name from comment differs: v4l2_get_subdevdata v4l2_get_subdev_hostdata
drivers/media/dvb-core/dvb_ringbuffer.h:196 [kernel-doc WARN] : function name from comment differs: dvb_ringbuffer_writeuser dvb_ringbuffer_write_user
include/media/videobuf2-core.h:399 [kernel-doc WARN] : struct name from comment differs: vb2_ops vb2_buf_ops
include/media/media-entity.h:132 [kernel-doc ERROR] : duplicate parameter definition 'source'
include/media/media-entity.h:477 [kernel-doc WARN] : function name from comment differs: media_entity_enum_test media_entity_enum_test_and_set
include/media/media-entity.h:535 [kernel-doc WARN] : function name from comment differs: gobj_to_entity gobj_to_pad
include/media/media-entity.h:544 [kernel-doc WARN] : function name from comment differs: gobj_to_entity gobj_to_link
include/media/media-entity.h:553 [kernel-doc WARN] : function name from comment differs: gobj_to_entity gobj_to_intf
include/media/media-entity.h:562 [kernel-doc WARN] : function name from comment differs: gobj_to_entity intf_to_devnode
include/media/rc-core.h:234 [kernel-doc WARN] : function name from comment differs: rc_open rc_close
include/media/v4l2-ctrls.h:397 [kernel-doc WARN] : missing initial short description of 'v4l2_ctrl_handler_init'
include/media/v4l2-dev.h:118 [kernel-doc WARN] : function name from comment differs: v4l2_prio_close v4l2_prio_check
include/media/v4l2-event.h:225 [kernel-doc WARN] : missing initial short description of 'v4l2_src_change_event_subscribe'[1] https://return42.github.io/linuxdoc/linux.html
The above are real issues at the documentation. On several cases,
caused by cut-and-paste.Fix them.
Signed-off-by: Mauro Carvalho Chehab
09 Sep, 2016
3 commits
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The kernel-doc parser didn't handle well the private:
tag. Rewrite it.Signed-off-by: Mauro Carvalho Chehab
-
demux.h was lacking documentation for the DMX_FE_ENTRY macro:
./drivers/media/dvb-core/demux.h:511: WARNING: c:func reference target not found: DMX_FE_ENTRYWhile here, get rid of unused parameters and fix a few minor issues
at the header file.Signed-off-by: Mauro Carvalho Chehab
-
There are a few define macros not documented, because the ReST
output was causing more warnings.Now that this got fixed, document them. While here, fix the
remaining coding style issues.Signed-off-by: Mauro Carvalho Chehab