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  1. 03 Mar, 2017 2 commits
    • Sean Young's avatar
      [media] lirc: fix dead lock between open and wakeup_filter · db5b15b7
      Sean Young authored 
      The locking in lirc needs improvement, but for now just fix this potential
deadlock.

======================================================
[ INFO: possible circular locking dependency detected ]
4.10.0-rc1+ #1 Not tainted
-------------------------------------------------------
bash/2502 is trying to acquire lock:
 (ir_raw_handler_lock){+.+.+.}, at: [<ffffffffc06f6a5e>] ir_raw_encode_scancode+0x3e/0xb0 [rc_core]

               but task is already holding lock:
 (&dev->lock){+.+.+.}, at: [<ffffffffc06f511f>] store_filter+0x9f/0x240 [rc_core]

               which lock already depends on the new lock.

               the existing dependency chain (in reverse order) is:

               -> #2 (&dev->lock){+.+.+.}:

[<ffffffffa110adad>] lock_acquire+0xfd/0x200
[<ffffffffa1921327>] mutex_lock_nested+0x77/0x6d0
[<ffffffffc06f436a>] rc_open+0x2a/0x80 [rc_core]
[<ffffffffc07114ca>] lirc_dev_fop_open+0xda/0x1e0 [lirc_dev]
[<ffffffffa12975e0>] chrdev_open+0xb0/0x210
[<ffffffffa128eb5a>] do_dentry_open+0x20a/0x2f0
[<ffffffffa128ffcc>] vfs_open+0x4c/0x80
[<ffffffffa12a35ec>] path_openat+0x5bc/0xc00
[<ffffffffa12a5271>] do_filp_open+0x91/0x100
[<ffffffffa12903f0>] do_sys_open+0x130/0x220
[<ffffffffa12904fe>] SyS_open+0x1e/0x20
[<ffffffffa19278c1>] entry_SYSCALL_64_fastpath+0x1f/0xc2
               -> #1 (lirc_dev_lock){+.+.+.}:
[<ffffffffa110adad>] lock_acquire+0xfd/0x200
[<ffffffffa1921327>] mutex_lock_nested+0x77/0x6d0
[<ffffffffc0711f47>] lirc_register_driver+0x67/0x59b [lirc_dev]
[<ffffffffc06db7f4>] ir_lirc_register+0x1f4/0x260 [ir_lirc_codec]
[<ffffffffc06f6cac>] ir_raw_handler_register+0x7c/0xb0 [rc_core]
[<ffffffffc0398010>] 0xffffffffc0398010
[<ffffffffa1002192>] do_one_initcall+0x52/0x1b0
[<ffffffffa11ef5c8>] do_init_module+0x5f/0x1fa
[<ffffffffa11566b5>] load_module+0x2675/0x2b00
[<ffffffffa1156dcf>] SYSC_finit_module+0xdf/0x110
[<ffffffffa1156e1e>] SyS_finit_module+0xe/0x10
[<ffffffffa1003f5c>] do_syscall_64+0x6c/0x1f0
[<ffffffffa1927989>] return_from_SYSCALL_64+0x0/0x7a
               -> #0 (ir_raw_handler_lock){+.+.+.}:
[<ffffffffa110a7b7>] __lock_acquire+0x10f7/0x1290
[<ffffffffa110adad>] lock_acquire+0xfd/0x200
[<ffffffffa1921327>] mutex_lock_nested+0x77/0x6d0
[<ffffffffc06f6a5e>] ir_raw_encode_scancode+0x3e/0xb0 [rc_core]
[<ffffffffc0b0f492>] loop_set_wakeup_filter+0x62/0xbd [rc_loopback]
[<ffffffffc06f522a>] store_filter+0x1aa/0x240 [rc_core]
[<ffffffffa15e46f8>] dev_attr_store+0x18/0x30
[<ffffffffa13318e5>] sysfs_kf_write+0x45/0x60
[<ffffffffa1330b55>] kernfs_fop_write+0x155/0x1e0
[<ffffffffa1290797>] __vfs_write+0x37/0x160
[<ffffffffa12921f8>] vfs_write+0xc8/0x1e0
[<ffffffffa12936e8>] SyS_write+0x58/0xc0
[<ffffffffa19278c1>] entry_SYSCALL_64_fastpath+0x1f/0xc2

               other info that might help us debug this:

Chain exists of:
                 ir_raw_handler_lock --> lirc_dev_lock --> &dev->lock

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&dev->lock);
                               lock(lirc_dev_lock);
                               lock(&dev->lock);
  lock(ir_raw_handler_lock);

                *** DEADLOCK ***

4 locks held by bash/2502:
 #0:  (sb_writers#4){.+.+.+}, at: [<ffffffffa12922c5>] vfs_write+0x195/0x1e0
 #1:  (&of->mutex){+.+.+.}, at: [<ffffffffa1330b1f>] kernfs_fop_write+0x11f/0x1e0
 #2:  (s_active#215){.+.+.+}, at: [<ffffffffa1330b28>] kernfs_fop_write+0x128/0x1e0
 #3:  (&dev->lock){+.+.+.}, at: [<ffffffffc06f511f>] store_filter+0x9f/0x240 [rc_core]

               stack backtrace:
CPU: 3 PID: 2502 Comm: bash Not tainted 4.10.0-rc1+ #1
Hardware name:                  /DG45ID, BIOS IDG4510H.86A.0135.2011.0225.1100 02/25/2011
Call Trace:
 dump_stack+0x86/0xc3
 print_circular_bug+0x1be/0x210
 __lock_acquire+0x10f7/0x1290
 lock_acquire+0xfd/0x200
 ? ir_raw_encode_scancode+0x3e/0xb0 [rc_core]
 ? ir_raw_encode_scancode+0x3e/0xb0 [rc_core]
 mutex_lock_nested+0x77/0x6d0
 ? ir_raw_encode_scancode+0x3e/0xb0 [rc_core]
 ? loop_set_wakeup_filter+0x44/0xbd [rc_loopback]
 ir_raw_encode_scancode+0x3e/0xb0 [rc_core]
 loop_set_wakeup_filter+0x62/0xbd [rc_loopback]
 ? loop_set_tx_duty_cycle+0x70/0x70 [rc_loopback]
 store_filter+0x1aa/0x240 [rc_core]
 dev_attr_store+0x18/0x30
 sysfs_kf_write+0x45/0x60
 kernfs_fop_write+0x155/0x1e0
 __vfs_write+0x37/0x160
 ? rcu_read_lock_sched_held+0x4a/0x80
 ? rcu_sync_lockdep_assert+0x2f/0x60
 ? __sb_start_write+0x10c/0x220
 ? vfs_write+0x195/0x1e0
 ? security_file_permission+0x3b/0xc0
 vfs_write+0xc8/0x1e0
 SyS_write+0x58/0xc0
 entry_SYSCALL_64_fastpath+0x1f/0xc2
Signed-off-by: default avatarSean Young <sean@mess.org>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
      db5b15b7
    • Sean Young's avatar
      [media] serial_ir: ensure we're ready to receive interrupts · 0265634e
      Sean Young authored 
      When the interrupt requested with devm_request_irq(), serial_ir.rcdev
is still null so will cause null deference if the irq handler is called
early on.

Also ensure that timeout_timer is setup.

Link: http://lkml.kernel.org/r/CA+55aFxsh2uF8gi5sN_guY3Z+tiLv7LpJYKBw+y8vqLzp+TsnQ@mail.gmail.com

[mchehab@s-opensource.com: moved serial_ir_probe() back to its original place]

Cc: <stable@vger.kernel.org> # 4.10
Signed-off-by: default avatarSean Young <sean@mess.org>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
      0265634e
  3. 08 Feb, 2017 22 commits
  5. 07 Feb, 2017 2 commits
  7. 03 Feb, 2017 14 commits
    • Tuukka Toivonen's avatar
      [media] v4l2-async: failing functions shouldn't have side effects · 47b037a0
      Tuukka Toivonen authored 
      v4l2-async had several functions doing some operations and then
not undoing the operations in a failure situation. For example,
v4l2_async_test_notify() moved a subdev into notifier's done list
even if registering the subdev (v4l2_device_register_subdev) failed.
If the subdev was allocated and v4l2_async_register_subdev() called
from the driver's probe() function, as usually, the probe()
function freed the allocated subdev and returned a failure.
Nevertheless, the subdev was still left into the notifier's done
list, causing an access to already freed memory when the notifier
was later unregistered.

A hand-edited call trace leaving freed subdevs into the notifier:

v4l2_async_register_notifier(notifier, asd)
cameradrv_probe
 sd = devm_kzalloc()
 v4l2_async_register_subdev(sd)
  v4l2_async_test_notify(notifier, sd, asd)
   list_move(sd, &notifier->done)
   v4l2_device_register_subdev(notifier->v4l2_dev, sd)
    cameradrv_registered(sd) -> fails
->v4l2_async_register_subdev returns failure
->cameradrv_probe returns failure
->devres frees the allocated sd
->sd was freed but it still remains in the notifier's list.

This patch fixes this and several other cases where a failing
function could leave nodes into a linked list while the caller
might free the node due to a failure.
Signed-off-by: default avatarTuukka Toivonen <tuukka.toivonen@intel.com>
Acked-by: default avatarSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
      47b037a0
    • Dan Carpenter's avatar
      [media] mantis_dvb: fix some error codes in mantis_dvb_init() · 79a2eda8
      Dan Carpenter authored 
      We should be returning negative error codes here or it leads to a crash.
This also silences a static checker warning.

	drivers/media/pci/mantis/mantis_cards.c:250 mantis_pci_probe()
	warn: 'mantis->dmxdev.dvbdev->fops' double freed
Signed-off-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
      79a2eda8
    • Javier Martinez Canillas's avatar
      [media] exynos-gsc: Avoid spamming the log on VIDIOC_TRY_FMT · c2987aaf
      Javier Martinez Canillas authored 
      There isn't an ioctl to enum the supported field orders, so a user-space
application can call VIDIOC_TRY_FMT using different field orders to know
if one is supported. For example, GStreamer does this so during playback
dozens of the following messages appear in the kernel log buffer:

[ 442.143393] Not supported field order(4)

Instead of printing this as an error, just keep it as debug information.
Signed-off-by: default avatarJavier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
      c2987aaf
    • Mauro Carvalho Chehab's avatar
      [media] dvb-usb: don't use stack for firmware load · 43fab979
      Mauro Carvalho Chehab authored 
      As reported by Marc Duponcheel <marc@offline.be>, firmware load on
dvb-usb is using the stack, with is not allowed anymore on default
Kernel configurations:

[ 1025.958836] dvb-usb: found a 'WideView WT-220U PenType Receiver (based on ZL353)' in cold state, will try to load a firmware
[ 1025.958853] dvb-usb: downloading firmware from file 'dvb-usb-wt220u-zl0353-01.fw'
[ 1025.958855] dvb-usb: could not stop the USB controller CPU.
[ 1025.958856] dvb-usb: error while transferring firmware (transferred size: -11, block size: 3)
[ 1025.958856] dvb-usb: firmware download failed at 8 with -22
[ 1025.958867] usbcore: registered new interface driver dvb_usb_dtt200u

[    2.789902] dvb-usb: downloading firmware from file 'dvb-usb-wt220u-zl0353-01.fw'
[    2.789905] ------------[ cut here ]------------
[    2.789911] WARNING: CPU: 3 PID: 2196 at drivers/usb/core/hcd.c:1584 usb_hcd_map_urb_for_dma+0x430/0x560 [usbcore]
[    2.789912] transfer buffer not dma capable
[    2.789912] Modules linked in: btusb dvb_usb_dtt200u(+) dvb_usb_af9035(+) btrtl btbcm dvb_usb dvb_usb_v2 btintel dvb_core bluetooth rc_core rfkill x86_pkg_temp_thermal intel_powerclamp coretemp crc32_pclmul aesni_intel aes_x86_64 glue_helper lrw gf128mul ablk_helper cryptd drm_kms_helper syscopyarea sysfillrect pcspkr i2c_i801 sysimgblt fb_sys_fops drm i2c_smbus i2c_core r8169 lpc_ich mfd_core mii thermal fan rtc_cmos video button acpi_cpufreq processor snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hwdep snd_hda_core snd_pcm snd_timer snd crc32c_intel ahci libahci libata xhci_pci ehci_pci xhci_hcd ehci_hcd usbcore usb_common dm_mirror dm_region_hash dm_log dm_mod
[    2.789936] CPU: 3 PID: 2196 Comm: systemd-udevd Not tainted 4.9.0-gentoo #1
[    2.789937] Hardware name: ASUS All Series/H81I-PLUS, BIOS 0401 07/23/2013
[    2.789938]  ffffc9000339b690 ffffffff812bd397 ffffc9000339b6e0 0000000000000000
[    2.789939]  ffffc9000339b6d0 ffffffff81055c86 000006300339b6a0 ffff880116c0c000
[    2.789941]  0000000000000000 0000000000000000 0000000000000001 ffff880116c08000
[    2.789942] Call Trace:
[    2.789945]  [<ffffffff812bd397>] dump_stack+0x4d/0x66
[    2.789947]  [<ffffffff81055c86>] __warn+0xc6/0xe0
[    2.789948]  [<ffffffff81055cea>] warn_slowpath_fmt+0x4a/0x50
[    2.789952]  [<ffffffffa006d460>] usb_hcd_map_urb_for_dma+0x430/0x560 [usbcore]
[    2.789954]  [<ffffffff814ed5a8>] ? io_schedule_timeout+0xd8/0x110
[    2.789956]  [<ffffffffa006e09c>] usb_hcd_submit_urb+0x9c/0x980 [usbcore]
[    2.789958]  [<ffffffff812d0ebf>] ? copy_page_to_iter+0x14f/0x2b0
[    2.789960]  [<ffffffff81126818>] ? pagecache_get_page+0x28/0x240
[    2.789962]  [<ffffffff8118c2a0>] ? touch_atime+0x20/0xa0
[    2.789964]  [<ffffffffa006f7c4>] usb_submit_urb+0x2c4/0x520 [usbcore]
[    2.789967]  [<ffffffffa006feca>] usb_start_wait_urb+0x5a/0xe0 [usbcore]
[    2.789969]  [<ffffffffa007000c>] usb_control_msg+0xbc/0xf0 [usbcore]
[    2.789970]  [<ffffffffa067903d>] usb_cypress_writemem+0x3d/0x40 [dvb_usb]
[    2.789972]  [<ffffffffa06791cf>] usb_cypress_load_firmware+0x4f/0x130 [dvb_usb]
[    2.789973]  [<ffffffff8109dbbe>] ? console_unlock+0x2fe/0x5d0
[    2.789974]  [<ffffffff8109e10c>] ? vprintk_emit+0x27c/0x410
[    2.789975]  [<ffffffff8109e40a>] ? vprintk_default+0x1a/0x20
[    2.789976]  [<ffffffff81124d76>] ? printk+0x43/0x4b
[    2.789977]  [<ffffffffa0679310>] dvb_usb_download_firmware+0x60/0xd0 [dvb_usb]
[    2.789979]  [<ffffffffa0679898>] dvb_usb_device_init+0x3d8/0x610 [dvb_usb]
[    2.789981]  [<ffffffffa069e302>] dtt200u_usb_probe+0x92/0xd0 [dvb_usb_dtt200u]
[    2.789984]  [<ffffffffa007420c>] usb_probe_interface+0xfc/0x270 [usbcore]
[    2.789985]  [<ffffffff8138bf95>] driver_probe_device+0x215/0x2d0
[    2.789986]  [<ffffffff8138c0e6>] __driver_attach+0x96/0xa0
[    2.789987]  [<ffffffff8138c050>] ? driver_probe_device+0x2d0/0x2d0
[    2.789988]  [<ffffffff81389ffb>] bus_for_each_dev+0x5b/0x90
[    2.789989]  [<ffffffff8138b7b9>] driver_attach+0x19/0x20
[    2.789990]  [<ffffffff8138b33c>] bus_add_driver+0x11c/0x220
[    2.789991]  [<ffffffff8138c91b>] driver_register+0x5b/0xd0
[    2.789994]  [<ffffffffa0072f6c>] usb_register_driver+0x7c/0x130 [usbcore]
[    2.789994]  [<ffffffffa06a5000>] ? 0xffffffffa06a5000
[    2.789996]  [<ffffffffa06a501e>] dtt200u_usb_driver_init+0x1e/0x20 [dvb_usb_dtt200u]
[    2.789997]  [<ffffffff81000408>] do_one_initcall+0x38/0x140
[    2.789998]  [<ffffffff8116001c>] ? __vunmap+0x7c/0xc0
[    2.789999]  [<ffffffff81124fb0>] ? do_init_module+0x22/0x1d2
[    2.790000]  [<ffffffff81124fe8>] do_init_module+0x5a/0x1d2
[    2.790002]  [<ffffffff810c96b1>] load_module+0x1e11/0x2580
[    2.790003]  [<ffffffff810c68b0>] ? show_taint+0x30/0x30
[    2.790004]  [<ffffffff81177250>] ? kernel_read_file+0x100/0x190
[    2.790005]  [<ffffffff810c9ffa>] SyS_finit_module+0xba/0xc0
[    2.790007]  [<ffffffff814f13e0>] entry_SYSCALL_64_fastpath+0x13/0x94
[    2.790008] ---[ end trace c78a74e78baec6fc ]---

So, allocate the structure dynamically.

Cc: stable@vger.kernel.org # Kernel 4.9+
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
      43fab979
    • Christophe JAILLET's avatar
      [media] exynos4-is: Add missing 'of_node_put' · 2b2d1d40
      Christophe JAILLET authored 
      It is likely that a "of_node_put(ep)" is missing here.
There is one in the previous error handling code, and one a few lines
below in the normal case as well.
Signed-off-by: default avatarChristophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
      2b2d1d40
    • Bhumika Goyal's avatar
      [media] media: dvb-frontends: constify vb2_ops structure · dd93e79c
      Bhumika Goyal authored 
      Declare vb2_ops structure as const as it is only stored in
the ops field of a vb2_queue structure. This field is of type
const, so vb2_ops structures having same properties can be made
const too.
Done using Coccinelle:

@r1 disable optional_qualifier@
identifier i;
position p;
@@
static struct vb2_ops i@p={...};

@ok1@
identifier r1.i;
position p;
struct sta2x11_vip vip;
struct vb2_queue q;
@@
(
vip.vb_vidq.ops=&i@p
|
q.ops=&i@p
)

@bad@
position p!={r1.p,ok1.p};
identifier r1.i;
@@
i@p

@depends on !bad disable optional_qualifier@
identifier r1.i;
@@
+const
struct vb2_ops i;

File size details of media/dvb-frontends/rtl2832_sdr.o file remains the
same before and after applying the patch.
Signed-off-by: default avatarBhumika Goyal <bhumirks@gmail.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
      dd93e79c
    • Bhumika Goyal's avatar
      [media] media: pci: constify vb2_ops structure · 8b6fe20a
      Bhumika Goyal authored 
      Declare vb2_ops structure as const as it is only stored in
the ops field of a vb2_queue structure. This field is of type
const, so vb2_ops structures having same properties can be made
const too.
Done using Coccinelle:

@r1 disable optional_qualifier@
identifier i;
position p;
@@
static struct vb2_ops i@p={...};

@ok1@
identifier r1.i;
position p;
struct sta2x11_vip vip;
struct vb2_queue q;
@@
(
vip.vb_vidq.ops=&i@p
|
q.ops=&i@p
)

@bad@
position p!={r1.p,ok1.p};
identifier r1.i;
@@
i@p

@depends on !bad disable optional_qualifier@
identifier r1.i;
@@
+const
struct vb2_ops i;

File size before:
   text	   data	    bss	    dec	    hex	filename
   8448	    440	      0	   8888	   22b8	media/pci/sta2x11/sta2x11_vip.o

File size after:
   text	   data	    bss	    dec	    hex	filename
   8552	    352	      0	   8904	   22c8	media/pci/sta2x11/sta2x11_vip.o
Signed-off-by: default avatarBhumika Goyal <bhumirks@gmail.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
      8b6fe20a
    • Laurent Pinchart's avatar
      [media] v4l: subdev: Clean up properly in subdev devnode registration error path · 909aa003
      Laurent Pinchart authored 
      Set the subdev devnode pointer right after registration to ensure that
later errors won't skip the subdev when unregistering all devnodes.
Signed-off-by: default avatarLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: default avatarSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
      909aa003
    • Baruch Siach's avatar
      [media] coda: add Freescale firmware compatibility location · 8af7779f
      Baruch Siach authored 
      The Freescale provided imx-vpu looks for firmware files under /lib/firmware/vpu
by default. Make coda look there for firmware files to ease the update path.

Cc: Fabio Estevam <festevam@gmail.com>
Signed-off-by: default avatarBaruch Siach <baruch@tkos.co.il>
Reviewed-by: default avatarFabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
      8af7779f
    • Sean Young's avatar
      [media] mce_kbd: add missing keys from UK layout · 44750606
      Sean Young authored 
      The UK layout of the Microsoft Remote Keyboard has two missing keys:
the hash key, and the messenger key which is sent using rc6 mce.
Signed-off-by: default avatarSean Young <sean@mess.org>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
      44750606
    • Sean Young's avatar
      [media] lirc: cannot read from tx-only device · 32002f72
      Sean Young authored 
      Bail out early, otherwise we follow a null pointer.
Signed-off-by: default avatarSean Young <sean@mess.org>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
      32002f72
    • Martin Blumenstingl's avatar
      [media] Documentation: devicetree: add the RC map name of the geekbox remote · 7a6628b5
      Martin Blumenstingl authored 
      Keep the list up to date with include/media/rc-map.h
Signed-off-by: default avatarMartin Blumenstingl <martin.blumenstingl@googlemail.com>
Acked-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarSean Young <sean@mess.org>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
      7a6628b5
    • Martin Blumenstingl's avatar
      [media] Documentation: devicetree: meson-ir: "linux,rc-map-name" is supported · 031d3e18
      Martin Blumenstingl authored 
      The driver already parses the "linux,rc-map-name" property. Add this
information to the documentation so .dts maintainers don't have to look
it up in the source-code.
Signed-off-by: default avatarMartin Blumenstingl <martin.blumenstingl@googlemail.com>
Acked-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarSean Young <sean@mess.org>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
      031d3e18
    • Wei Yongjun's avatar
      [media] gp8psk: make local symbol gp8psk_fe_ops static · d46e0a8b
      Wei Yongjun authored 
      Fixes the following sparse warning:

drivers/media/usb/dvb-usb/gp8psk.c:281:28: warning:
 symbol 'gp8psk_fe_ops' was not declared. Should it be static?
Signed-off-by: default avatarWei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
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