[PATCH 0/4] vb2/saa7134 regression/documentation fixes

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* [PATCH 0/4] vb2/saa7134 regression/documentation fixes
@ 2014-09-17  9:14 Hans Verkuil
  2014-09-17  9:14 ` [PATCH 1/4] vb2: fix VBI regression Hans Verkuil
                   ` (5 more replies)
  0 siblings, 6 replies; 10+ messages in thread
From: Hans Verkuil @ 2014-09-17  9:14 UTC (permalink / raw)
  To: linux-media

This fixes the VBI regression seen in saa7134 when it was converted
to vb2. Tested with my saa7134 board.

It also updates the poll documentation and fixes a saa7134 bug where
the WSS signal was never captured.

The first patch should go to 3.17. It won't apply to older kernels,
so I guess once this is merged we should post a patch to stable for
those older kernels, certainly 3.16.

I would expect this to be an issue for em28xx as well, but I will
need to test that. If that driver is affected as well, then this
fix needs to go into 3.9 and up.

Regards,

	Hans

^ permalink raw reply	[flat|nested] 10+ messages in thread

* [PATCH 1/4] vb2: fix VBI regression
  2014-09-17  9:14 [PATCH 0/4] vb2/saa7134 regression/documentation fixes Hans Verkuil
@ 2014-09-17  9:14 ` Hans Verkuil
  2014-09-17  9:14 ` [PATCH 2/4] DocBook media: fix poll specification Hans Verkuil
                   ` (4 subsequent siblings)
  5 siblings, 0 replies; 10+ messages in thread
From: Hans Verkuil @ 2014-09-17  9:14 UTC (permalink / raw)
  To: linux-media; +Cc: Hans Verkuil

From: Hans Verkuil <hans.verkuil@cisco.com>

This patch brings the vb2 poll() behavior in line with vb1. The poll()
function is expected to return POLLERR if REQBUFS has been called, but
not yet STREAMON.

Various VBI capture applications (mtt, alevt) rely on that behavior,
and in fact the V4L2 Specification requires it as well.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Tested-by: Hans Verkuil <hans.verkuil@cisco.com>
---
 drivers/media/v4l2-core/videobuf2-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/v4l2-core/videobuf2-core.c b/drivers/media/v4l2-core/videobuf2-core.c
index 7e6aff6..9fbf6b7 100644
--- a/drivers/media/v4l2-core/videobuf2-core.c
+++ b/drivers/media/v4l2-core/videobuf2-core.c
@@ -2586,7 +2586,7 @@ unsigned int vb2_poll(struct vb2_queue *q, struct file *file, poll_table *wait)
 	 * There is nothing to wait for if no buffer has been queued and the
 	 * queue isn't streaming, or if the error flag is set.
 	 */
-	if ((list_empty(&q->queued_list) && !vb2_is_streaming(q)) || q->error)
+	if (!vb2_is_streaming(q) || q->error)
 		return res | POLLERR;
 
 	/*
-- 
2.1.0


^ permalink raw reply related	[flat|nested] 10+ messages in thread

* [PATCH 2/4] DocBook media: fix poll specification
  2014-09-17  9:14 [PATCH 0/4] vb2/saa7134 regression/documentation fixes Hans Verkuil
  2014-09-17  9:14 ` [PATCH 1/4] vb2: fix VBI regression Hans Verkuil
@ 2014-09-17  9:14 ` Hans Verkuil
  2014-09-17  9:14 ` [PATCH 3/4] DocBook media: update poll() documentation Hans Verkuil
                   ` (3 subsequent siblings)
  5 siblings, 0 replies; 10+ messages in thread
From: Hans Verkuil @ 2014-09-17  9:14 UTC (permalink / raw)
  To: linux-media; +Cc: Hans Verkuil

From: Hans Verkuil <hans.verkuil@cisco.com>

The poll specification mentioned that it would return POLLERR if no
buffers are queued. This makes no sense since the buffer queue can
become empty during capturing and you want poll to wait until another
thread queues up a new buffer and not to return POLLERR.

In the case where STREAMON is called without any buffers queued, the
STREAMON ioctl will already check if enough buffers have been queued
and return an error if that's not the case. This is driver dependent,
some drivers require that buffers are queued, others don't.

The poll() function certainly shouldn't check for this.

Just drop the part about POLLERR being returned if QBUF wasn't called.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
---
 Documentation/DocBook/media/v4l/func-poll.xml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/DocBook/media/v4l/func-poll.xml b/Documentation/DocBook/media/v4l/func-poll.xml
index 85cad8b..2f91ca6 100644
--- a/Documentation/DocBook/media/v4l/func-poll.xml
+++ b/Documentation/DocBook/media/v4l/func-poll.xml
@@ -44,7 +44,7 @@ Capture devices set the <constant>POLLIN</constant> and
 flags. When the function timed out it returns a value of zero, on
 failure it returns <returnvalue>-1</returnvalue> and the
 <varname>errno</varname> variable is set appropriately. When the
-application did not call &VIDIOC-QBUF; or &VIDIOC-STREAMON; yet the
+application did not call &VIDIOC-STREAMON; the
 <function>poll()</function> function succeeds, but sets the
 <constant>POLLERR</constant> flag in the
 <structfield>revents</structfield> field.</para>
-- 
2.1.0


^ permalink raw reply related	[flat|nested] 10+ messages in thread

* [PATCH 3/4] DocBook media: update poll() documentation
  2014-09-17  9:14 [PATCH 0/4] vb2/saa7134 regression/documentation fixes Hans Verkuil
  2014-09-17  9:14 ` [PATCH 1/4] vb2: fix VBI regression Hans Verkuil
  2014-09-17  9:14 ` [PATCH 2/4] DocBook media: fix poll specification Hans Verkuil
@ 2014-09-17  9:14 ` Hans Verkuil
  2014-09-17  9:14 ` [PATCH 4/4] saa7134: also capture the WSS signal for 50 Hz VBI capture Hans Verkuil
                   ` (2 subsequent siblings)
  5 siblings, 0 replies; 10+ messages in thread
From: Hans Verkuil @ 2014-09-17  9:14 UTC (permalink / raw)
  To: linux-media; +Cc: Hans Verkuil

From: Hans Verkuil <hans.verkuil@cisco.com>

No mention was made about the handling of POLLPRI. And the section
on write() was missing that, just like in the read() case, the driver
will start streaming if it wasn't yet in streaming mode.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
---
 Documentation/DocBook/media/v4l/func-poll.xml | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/Documentation/DocBook/media/v4l/func-poll.xml b/Documentation/DocBook/media/v4l/func-poll.xml
index 2f91ca6..ac61c37 100644
--- a/Documentation/DocBook/media/v4l/func-poll.xml
+++ b/Documentation/DocBook/media/v4l/func-poll.xml
@@ -49,6 +49,10 @@ application did not call &VIDIOC-STREAMON; the
 <constant>POLLERR</constant> flag in the
 <structfield>revents</structfield> field.</para>
 
+    <para>If an event occurred (see &VIDIOC-DQEVENT;) then
+<constant>POLLPRI</constant> will be set in the <structfield>revents</structfield>
+field and <function>poll()</function> will return.</para>
+
     <para>When use of the <function>read()</function> function has
 been negotiated and the driver does not capture yet, the
 <function>poll</function> function starts capturing. When that fails
@@ -58,10 +62,18 @@ continuously (as opposed to, for example, still images) the function
 may return immediately.</para>
 
     <para>When use of the <function>write()</function> function has
-been negotiated the <function>poll</function> function just waits
+been negotiated and the driver does not stream yet, the
+<function>poll</function> function starts streaming. When that fails
+it returns a <constant>POLLERR</constant> as above. Otherwise it waits
 until the driver is ready for a non-blocking
 <function>write()</function> call.</para>
 
+    <para>If the caller is only interested in events (just
+<constant>POLLPRI</constant> is set in the <structfield>events</structfield>
+field), then <function>poll()</function> will <emphasis>not</emphasis>
+start streaming if the driver does not stream yet. This makes it
+possible to just poll for events and not for buffers.</para>
+
     <para>All drivers implementing the <function>read()</function> or
 <function>write()</function> function or streaming I/O must also
 support the <function>poll()</function> function.</para>
-- 
2.1.0


^ permalink raw reply related	[flat|nested] 10+ messages in thread

* [PATCH 4/4] saa7134: also capture the WSS signal for 50 Hz VBI capture
  2014-09-17  9:14 [PATCH 0/4] vb2/saa7134 regression/documentation fixes Hans Verkuil
                   ` (2 preceding siblings ...)
  2014-09-17  9:14 ` [PATCH 3/4] DocBook media: update poll() documentation Hans Verkuil
@ 2014-09-17  9:14 ` Hans Verkuil
  2014-09-17 16:06 ` [PATCH 0/4] vb2/saa7134 regression/documentation fixes Hans Verkuil
  2014-09-18 12:55 ` Mauro Carvalho Chehab
  5 siblings, 0 replies; 10+ messages in thread
From: Hans Verkuil @ 2014-09-17  9:14 UTC (permalink / raw)
  To: linux-media; +Cc: Hans Verkuil

From: Hans Verkuil <hans.verkuil@cisco.com>

The saa7134 driver missed capturing line 23 of the VBI area for the
50 Hz formats. Include that line in the VBI capture.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Tested-by: Hans Verkuil <hans.verkuil@cisco.com>
---
 drivers/media/pci/saa7134/saa7134-vbi.c   | 2 +-
 drivers/media/pci/saa7134/saa7134-video.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/media/pci/saa7134/saa7134-vbi.c b/drivers/media/pci/saa7134/saa7134-vbi.c
index c06dbe1..4f0b101 100644
--- a/drivers/media/pci/saa7134/saa7134-vbi.c
+++ b/drivers/media/pci/saa7134/saa7134-vbi.c
@@ -43,7 +43,7 @@ MODULE_PARM_DESC(vbibufs,"number of vbi buffers, range 2-32");
 
 /* ------------------------------------------------------------------ */
 
-#define VBI_LINE_COUNT     16
+#define VBI_LINE_COUNT     17
 #define VBI_LINE_LENGTH  2048
 #define VBI_SCALE       0x200
 
diff --git a/drivers/media/pci/saa7134/saa7134-video.c b/drivers/media/pci/saa7134/saa7134-video.c
index 0cfa2ca..fc4a427 100644
--- a/drivers/media/pci/saa7134/saa7134-video.c
+++ b/drivers/media/pci/saa7134/saa7134-video.c
@@ -201,7 +201,7 @@ static struct saa7134_format formats[] = {
 		.video_v_start = 24,	\
 		.video_v_stop  = 311,	\
 		.vbi_v_start_0 = 7,	\
-		.vbi_v_stop_0  = 22,	\
+		.vbi_v_stop_0  = 23,	\
 		.vbi_v_start_1 = 319,   \
 		.src_timing    = 4
 
-- 
2.1.0


^ permalink raw reply related	[flat|nested] 10+ messages in thread

* Re: [PATCH 0/4] vb2/saa7134 regression/documentation fixes
  2014-09-17  9:14 [PATCH 0/4] vb2/saa7134 regression/documentation fixes Hans Verkuil
                   ` (3 preceding siblings ...)
  2014-09-17  9:14 ` [PATCH 4/4] saa7134: also capture the WSS signal for 50 Hz VBI capture Hans Verkuil
@ 2014-09-17 16:06 ` Hans Verkuil
  2014-09-18 16:21   ` Mauro Carvalho Chehab
  2014-09-18 12:55 ` Mauro Carvalho Chehab
  5 siblings, 1 reply; 10+ messages in thread
From: Hans Verkuil @ 2014-09-17 16:06 UTC (permalink / raw)
  To: linux-media

On 09/17/2014 11:14 AM, Hans Verkuil wrote:
> This fixes the VBI regression seen in saa7134 when it was converted
> to vb2. Tested with my saa7134 board.
> 
> It also updates the poll documentation and fixes a saa7134 bug where
> the WSS signal was never captured.
> 
> The first patch should go to 3.17. It won't apply to older kernels,
> so I guess once this is merged we should post a patch to stable for
> those older kernels, certainly 3.16.
> 
> I would expect this to be an issue for em28xx as well, but I will
> need to test that. If that driver is affected as well, then this
> fix needs to go into 3.9 and up.

Update: the VBI apps won't work with the em28xx driver as I suspected.
With the fix all is fine for em28xx.

	Hans

> 
> Regards,
> 
> 	Hans
> 
> --
> To unsubscribe from this list: send the line "unsubscribe linux-media" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> 


^ permalink raw reply	[flat|nested] 10+ messages in thread

* Re: [PATCH 0/4] vb2/saa7134 regression/documentation fixes
  2014-09-17 16:06 ` [PATCH 0/4] vb2/saa7134 regression/documentation fixes Hans Verkuil
@ 2014-09-18 16:21   ` Mauro Carvalho Chehab
  2014-09-18 16:26     ` Hans Verkuil
  0 siblings, 1 reply; 10+ messages in thread
From: Mauro Carvalho Chehab @ 2014-09-18 16:21 UTC (permalink / raw)
  To: Hans Verkuil; +Cc: linux-media

Em Wed, 17 Sep 2014 18:06:02 +0200
Hans Verkuil <hverkuil@xs4all.nl> escreveu:

> On 09/17/2014 11:14 AM, Hans Verkuil wrote:
> > This fixes the VBI regression seen in saa7134 when it was converted
> > to vb2. Tested with my saa7134 board.
> > 
> > It also updates the poll documentation and fixes a saa7134 bug where
> > the WSS signal was never captured.
> > 
> > The first patch should go to 3.17. It won't apply to older kernels,
> > so I guess once this is merged we should post a patch to stable for
> > those older kernels, certainly 3.16.
> > 
> > I would expect this to be an issue for em28xx as well, but I will
> > need to test that. If that driver is affected as well, then this
> > fix needs to go into 3.9 and up.
> 
> Update: the VBI apps won't work with the em28xx driver as I suspected.
> With the fix all is fine for em28xx.

At least here, em28xx with one application (xawtv or qv4l2) reading
at video0 and another one for vbi (mtt or zvbi), I'm getting the
errors below. Clearly, it is not just the poll syscall that it is
wrong on VB2 and/or em28xx.

I'm trying to identify what else is wrong there.

Regards,
Mauro

[63271.912808] ------------[ cut here ]------------
[63271.912832] WARNING: CPU: 5 PID: 14761 at drivers/media/v4l2-core/videobuf2-core.c:2126 __vb2_queue_cancel+0x1b1/0x260 [videobuf2_core]()
[63271.912835] Modules linked in: rc_hauppauge em28xx_rc rc_core lgdt330x em28xx_dvb dvb_core em28xx_alsa tuner_xc2028 tuner tvp5150 em28xx_v4l em28xx tveeprom fuse ip6table_filter ip6_tables bnep binfmt_misc vfat fat nouveau x86_pkg_temp_thermal coretemp kvm_intel kvm arc4 iwldvm mac80211 i915 uvcvideo iwlwifi ttm videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel crct10dif_pclmul media cfg80211 snd_hda_controller iTCO_wdt mxm_wmi i2c_algo_bit drm_kms_helper drm crc32_pclmul crc32c_intel ghash_clmulni_intel snd_hda_codec snd_hwdep iTCO_vendor_support btusb bluetooth snd_seq snd_seq_device snd_pcm snd_timer snd soundcore mei_me mei joydev i2c_i801 serio_raw microcode rfkill i2c_core lpc_ich mfd_core shpchp
[63271.913037]  wmi video r8169 mii
[63271.913048] CPU: 5 PID: 14761 Comm: xawtv Not tainted 3.16.0-rc6+ #23
[63271.913055] Hardware name: SAMSUNG ELECTRONICS CO., LTD. 550P5C/550P7C/SAMSUNG_NP1234567890, BIOS P05ABI.016.130917.dg 09/17/2013
[63271.913059]  0000000000000000 00000000051c953c ffff8800c4957c08 ffffffff816f523f
[63271.913067]  0000000000000000 ffff8800c4957c40 ffffffff8108be8d 0000000000000000
[63271.913072]  0000000000000001 ffff8800c5488948 ffff88003dd35500 0000000000000000
[63271.913081] Call Trace:
[63271.913098]  [<ffffffff816f523f>] dump_stack+0x45/0x56
[63271.913108]  [<ffffffff8108be8d>] warn_slowpath_common+0x7d/0xa0
[63271.913115]  [<ffffffff8108bfba>] warn_slowpath_null+0x1a/0x20
[63271.913137]  [<ffffffffa0319951>] __vb2_queue_cancel+0x1b1/0x260 [videobuf2_core]
[63271.913155]  [<ffffffffa031a2c5>] vb2_internal_streamoff+0x35/0x90 [videobuf2_core]
[63271.913171]  [<ffffffffa031a355>] vb2_streamoff+0x35/0x60 [videobuf2_core]
[63271.913184]  [<ffffffffa031a3c8>] vb2_ioctl_streamoff+0x48/0x50 [videobuf2_core]
[63271.913200]  [<ffffffffa02f0a8a>] v4l_streamoff+0x1a/0x20 [videodev]
[63271.913215]  [<ffffffffa02f39c4>] __video_do_ioctl+0x294/0x310 [videodev]
[63271.913231]  [<ffffffffa02f63be>] video_usercopy+0x22e/0x5b0 [videodev]
[63271.913244]  [<ffffffffa02f3730>] ? v4l_dbg_s_register+0x150/0x150 [videodev]
[63271.913258]  [<ffffffff810d26f1>] ? remove_wait_queue+0x31/0x40
[63271.913269]  [<ffffffff81425f92>] ? n_tty_write+0x392/0x510
[63271.913283]  [<ffffffffa02f6755>] video_ioctl2+0x15/0x20 [videodev]
[63271.913295]  [<ffffffffa02ef71b>] v4l2_ioctl+0x11b/0x150 [videodev]
[63271.913304]  [<ffffffff81200640>] do_vfs_ioctl+0x2e0/0x4a0
[63271.913310]  [<ffffffff81200881>] SyS_ioctl+0x81/0xa0
[63271.913319]  [<ffffffff81122656>] ? __audit_syscall_exit+0x1f6/0x2a0
[63271.913328]  [<ffffffff816fc869>] system_call_fastpath+0x16/0x1b
[63271.913333] ---[ end trace 9381964a5237f703 ]---
[63276.841245] ------------[ cut here ]------------
[63276.841256] WARNING: CPU: 1 PID: 1495 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x64/0x80()
[63276.841258] sysfs: cannot create duplicate filename '/devices/pci0000:00/0000:00:14.0/usb3/3-2/3-2:1.0/ep_81'
[63276.841260] Modules linked in: rc_hauppauge em28xx_rc rc_core lgdt330x em28xx_dvb dvb_core em28xx_alsa tuner_xc2028 tuner tvp5150 em28xx_v4l em28xx tveeprom fuse ip6table_filter ip6_tables bnep binfmt_misc vfat fat nouveau x86_pkg_temp_thermal coretemp kvm_intel kvm arc4 iwldvm mac80211 i915 uvcvideo iwlwifi ttm videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel crct10dif_pclmul media cfg80211 snd_hda_controller iTCO_wdt mxm_wmi i2c_algo_bit drm_kms_helper drm crc32_pclmul crc32c_intel ghash_clmulni_intel snd_hda_codec snd_hwdep iTCO_vendor_support btusb bluetooth snd_seq snd_seq_device snd_pcm snd_timer snd soundcore mei_me mei joydev i2c_i801 serio_raw microcode rfkill i2c_core lpc_ich mfd_core shpchp
[63276.841326]  wmi video r8169 mii
[63276.841333] CPU: 1 PID: 1495 Comm: pulseaudio Tainted: G        W     3.16.0-rc6+ #23
[63276.841335] Hardware name: SAMSUNG ELECTRONICS CO., LTD. 550P5C/550P7C/SAMSUNG_NP1234567890, BIOS P05ABI.016.130917.dg 09/17/2013
[63276.841337]  0000000000000000 0000000036bcbe1b ffff8800c1a137e8 ffffffff816f523f
[63276.841342]  ffff8800c1a13830 ffff8800c1a13820 ffffffff8108be8d ffff8800c7896000
[63276.841345]  ffff8800c7e07ea0 ffff8802217877f8 ffff880219ca4c10 ffff88021a763c58
[63276.841349] Call Trace:
[63276.841359]  [<ffffffff816f523f>] dump_stack+0x45/0x56
[63276.841364]  [<ffffffff8108be8d>] warn_slowpath_common+0x7d/0xa0
[63276.841368]  [<ffffffff8108bf0c>] warn_slowpath_fmt+0x5c/0x80
[63276.841373]  [<ffffffff81262b98>] ? kernfs_path+0x48/0x60
[63276.841376]  [<ffffffff812662a4>] sysfs_warn_dup+0x64/0x80
[63276.841380]  [<ffffffff8126634e>] sysfs_create_dir_ns+0x8e/0xa0
[63276.841387]  [<ffffffff8135837f>] kobject_add_internal+0xbf/0x3f0
[63276.841391]  [<ffffffff81358b75>] kobject_add+0x75/0xd0
[63276.841396]  [<ffffffff81462ae3>] ? device_private_init+0x23/0x80
[63276.841400]  [<ffffffff81462c65>] device_add+0x125/0x630
[63276.841403]  [<ffffffff8146318a>] device_register+0x1a/0x20
[63276.841410]  [<ffffffff814f2fa1>] usb_create_ep_devs+0x81/0xd0
[63276.841414]  [<ffffffff814ec2c5>] ? usb_enable_endpoint+0x85/0x90
[63276.841418]  [<ffffffff814eb69d>] create_intf_ep_devs+0x5d/0x80
[63276.841421]  [<ffffffff814ec585>] usb_set_interface+0x255/0x380
[63276.841428]  [<ffffffffa061c0a8>] snd_em28xx_capture_open+0x218/0x2d0 [em28xx_alsa]
[63276.841439]  [<ffffffffa012e835>] snd_pcm_open_substream+0x85/0x140 [snd_pcm]
[63276.841448]  [<ffffffffa012e9b2>] snd_pcm_open+0xc2/0x270 [snd_pcm]
[63276.841454]  [<ffffffff811d117c>] ? kmem_cache_alloc_trace+0x3c/0x200
[63276.841463]  [<ffffffffa0100d7a>] ? snd_card_file_add+0x2a/0xd0 [snd]
[63276.841469]  [<ffffffff810bf570>] ? wake_up_state+0x20/0x20
[63276.841478]  [<ffffffffa012eba3>] snd_pcm_capture_open+0x43/0x70 [snd_pcm]
[63276.841486]  [<ffffffffa0100594>] snd_open+0xb4/0x190 [snd]
[63276.841494]  [<ffffffff811f1e79>] chrdev_open+0xb9/0x1a0
[63276.841498]  [<ffffffff811ea7bf>] do_dentry_open+0x1ff/0x340
[63276.841503]  [<ffffffff811f1dc0>] ? cdev_put+0x30/0x30
[63276.841506]  [<ffffffff811eaad1>] finish_open+0x31/0x40
[63276.841510]  [<ffffffff811fca24>] do_last+0xa64/0x1190
[63276.841514]  [<ffffffff811f8d01>] ? link_path_walk+0x81/0x880
[63276.841518]  [<ffffffff811d1316>] ? kmem_cache_alloc_trace+0x1d6/0x200
[63276.841524]  [<ffffffff812edecc>] ? selinux_file_alloc_security+0x3c/0x60
[63276.841529]  [<ffffffff811fd21d>] path_openat+0xcd/0x670
[63276.841532]  [<ffffffff811f8779>] ? putname+0x29/0x40
[63276.841536]  [<ffffffff811fdf02>] ? user_path_at_empty+0x72/0xc0
[63276.841540]  [<ffffffff811fe01d>] do_filp_open+0x4d/0xb0
[63276.841546]  [<ffffffff8120a9fd>] ? __alloc_fd+0x7d/0x120
[63276.841549]  [<ffffffff811ec557>] do_sys_open+0x137/0x240
[63276.841553]  [<ffffffff811ec67e>] SyS_open+0x1e/0x20
[63276.841558]  [<ffffffff816fc869>] system_call_fastpath+0x16/0x1b
[63276.841561] ---[ end trace 9381964a5237f704 ]---
[63276.841563] ------------[ cut here ]------------
[63276.841568] WARNING: CPU: 1 PID: 1495 at lib/kobject.c:240 kobject_add_internal+0x284/0x3f0()
[63276.841570] kobject_add_internal failed for ep_81 with -EEXIST, don't try to register things with the same name in the same directory.
[63276.841572] Modules linked in: rc_hauppauge em28xx_rc rc_core lgdt330x em28xx_dvb dvb_core em28xx_alsa tuner_xc2028 tuner tvp5150 em28xx_v4l em28xx tveeprom fuse ip6table_filter ip6_tables bnep binfmt_misc vfat fat nouveau x86_pkg_temp_thermal coretemp kvm_intel kvm arc4 iwldvm mac80211 i915 uvcvideo iwlwifi ttm videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel crct10dif_pclmul media cfg80211 snd_hda_controller iTCO_wdt mxm_wmi i2c_algo_bit drm_kms_helper drm crc32_pclmul crc32c_intel ghash_clmulni_intel snd_hda_codec snd_hwdep iTCO_vendor_support btusb bluetooth snd_seq snd_seq_device snd_pcm snd_timer snd soundcore mei_me mei joydev i2c_i801 serio_raw microcode rfkill i2c_core lpc_ich mfd_core shpchp
[63276.841619]  wmi video r8169 mii
[63276.841624] CPU: 1 PID: 1495 Comm: pulseaudio Tainted: G        W     3.16.0-rc6+ #23
[63276.841626] Hardware name: SAMSUNG ELECTRONICS CO., LTD. 550P5C/550P7C/SAMSUNG_NP1234567890, BIOS P05ABI.016.130917.dg 09/17/2013
[63276.841627]  0000000000000000 0000000036bcbe1b ffff8800c1a13838 ffffffff816f523f
[63276.841631]  ffff8800c1a13880 ffff8800c1a13870 ffffffff8108be8d ffff880219ca4c20
[63276.841634]  00000000ffffffef ffff88021a364040 ffff880219ca4c10 ffff88021a763c58
[63276.841638] Call Trace:
[63276.841642]  [<ffffffff816f523f>] dump_stack+0x45/0x56
[63276.841646]  [<ffffffff8108be8d>] warn_slowpath_common+0x7d/0xa0
[63276.841649]  [<ffffffff8108bf0c>] warn_slowpath_fmt+0x5c/0x80
[63276.841654]  [<ffffffff81358544>] kobject_add_internal+0x284/0x3f0
[63276.841658]  [<ffffffff81358b75>] kobject_add+0x75/0xd0
[63276.841661]  [<ffffffff81462ae3>] ? device_private_init+0x23/0x80
[63276.841665]  [<ffffffff81462c65>] device_add+0x125/0x630
[63276.841679]  [<ffffffff8146318a>] device_register+0x1a/0x20
[63276.841684]  [<ffffffff814f2fa1>] usb_create_ep_devs+0x81/0xd0
[63276.841688]  [<ffffffff814ec2c5>] ? usb_enable_endpoint+0x85/0x90
[63276.841692]  [<ffffffff814eb69d>] create_intf_ep_devs+0x5d/0x80
[63276.841707]  [<ffffffff814ec585>] usb_set_interface+0x255/0x380
[63276.841712]  [<ffffffffa061c0a8>] snd_em28xx_capture_open+0x218/0x2d0 [em28xx_alsa]
[63276.841732]  [<ffffffffa012e835>] snd_pcm_open_substream+0x85/0x140 [snd_pcm]
[63276.841741]  [<ffffffffa012e9b2>] snd_pcm_open+0xc2/0x270 [snd_pcm]
[63276.841746]  [<ffffffff811d117c>] ? kmem_cache_alloc_trace+0x3c/0x200
[63276.841755]  [<ffffffffa0100d7a>] ? snd_card_file_add+0x2a/0xd0 [snd]
[63276.841761]  [<ffffffff810bf570>] ? wake_up_state+0x20/0x20
[63276.841770]  [<ffffffffa012eba3>] snd_pcm_capture_open+0x43/0x70 [snd_pcm]
[63276.841779]  [<ffffffffa0100594>] snd_open+0xb4/0x190 [snd]
[63276.841787]  [<ffffffff811f1e79>] chrdev_open+0xb9/0x1a0
[63276.841791]  [<ffffffff811ea7bf>] do_dentry_open+0x1ff/0x340
[63276.841796]  [<ffffffff811f1dc0>] ? cdev_put+0x30/0x30
[63276.841800]  [<ffffffff811eaad1>] finish_open+0x31/0x40
[63276.841804]  [<ffffffff811fca24>] do_last+0xa64/0x1190
[63276.841808]  [<ffffffff811f8d01>] ? link_path_walk+0x81/0x880
[63276.841813]  [<ffffffff811d1316>] ? kmem_cache_alloc_trace+0x1d6/0x200
[63276.841818]  [<ffffffff812edecc>] ? selinux_file_alloc_security+0x3c/0x60
[63276.841823]  [<ffffffff811fd21d>] path_openat+0xcd/0x670
[63276.841827]  [<ffffffff811f8779>] ? putname+0x29/0x40
[63276.841831]  [<ffffffff811fdf02>] ? user_path_at_empty+0x72/0xc0
[63276.841836]  [<ffffffff811fe01d>] do_filp_open+0x4d/0xb0
[63276.841841]  [<ffffffff8120a9fd>] ? __alloc_fd+0x7d/0x120
[63276.841846]  [<ffffffff811ec557>] do_sys_open+0x137/0x240
[63276.841850]  [<ffffffff811ec67e>] SyS_open+0x1e/0x20
[63276.841855]  [<ffffffff816fc869>] system_call_fastpath+0x16/0x1b
[63276.841857] ---[ end trace 9381964a5237f705 ]---
[63276.841867] ------------[ cut here ]------------
[63276.841872] WARNING: CPU: 1 PID: 1495 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x64/0x80()
[63276.841874] sysfs: cannot create duplicate filename '/devices/pci0000:00/0000:00:14.0/usb3/3-2/3-2:1.0/ep_82'
[63276.841875] Modules linked in: rc_hauppauge em28xx_rc rc_core lgdt330x em28xx_dvb dvb_core em28xx_alsa tuner_xc2028 tuner tvp5150 em28xx_v4l em28xx tveeprom fuse ip6table_filter ip6_tables bnep binfmt_misc vfat fat nouveau x86_pkg_temp_thermal coretemp kvm_intel kvm arc4 iwldvm mac80211 i915 uvcvideo iwlwifi ttm videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel crct10dif_pclmul media cfg80211 snd_hda_controller iTCO_wdt mxm_wmi i2c_algo_bit drm_kms_helper drm crc32_pclmul crc32c_intel ghash_clmulni_intel snd_hda_codec snd_hwdep iTCO_vendor_support btusb bluetooth snd_seq snd_seq_device snd_pcm snd_timer snd soundcore mei_me mei joydev i2c_i801 serio_raw microcode rfkill i2c_core lpc_ich mfd_core shpchp
[63276.841930]  wmi video r8169 mii
[63276.841935] CPU: 1 PID: 1495 Comm: pulseaudio Tainted: G        W     3.16.0-rc6+ #23
[63276.841937] Hardware name: SAMSUNG ELECTRONICS CO., LTD. 550P5C/550P7C/SAMSUNG_NP1234567890, BIOS P05ABI.016.130917.dg 09/17/2013
[63276.841939]  0000000000000000 0000000036bcbe1b ffff8800c1a137e8 ffffffff816f523f
[63276.841943]  ffff8800c1a13830 ffff8800c1a13820 ffffffff8108be8d ffff8800c7896000
[63276.841947]  ffff8800c7e07ea0 ffff8802217877f8 ffff880219ca4c10 ffff88021a763c58
[63276.841951] Call Trace:
[63276.841957]  [<ffffffff816f523f>] dump_stack+0x45/0x56
[63276.841961]  [<ffffffff8108be8d>] warn_slowpath_common+0x7d/0xa0
[63276.841965]  [<ffffffff8108bf0c>] warn_slowpath_fmt+0x5c/0x80
[63276.841970]  [<ffffffff81262b98>] ? kernfs_path+0x48/0x60
[63276.841973]  [<ffffffff812662a4>] sysfs_warn_dup+0x64/0x80
[63276.841977]  [<ffffffff8126634e>] sysfs_create_dir_ns+0x8e/0xa0
[63276.841983]  [<ffffffff8135837f>] kobject_add_internal+0xbf/0x3f0
[63276.842028]  [<ffffffff81358b75>] kobject_add+0x75/0xd0
[63276.842045]  [<ffffffff81462ae3>] ? device_private_init+0x23/0x80
[63276.842081]  [<ffffffff81462c65>] device_add+0x125/0x630
[63276.842101]  [<ffffffff8146318a>] device_register+0x1a/0x20
[63276.842123]  [<ffffffff814f2fa1>] usb_create_ep_devs+0x81/0xd0
[63276.842145]  [<ffffffff814eb69d>] create_intf_ep_devs+0x5d/0x80
[63276.842166]  [<ffffffff814ec585>] usb_set_interface+0x255/0x380
[63276.842201]  [<ffffffffa061c0a8>] snd_em28xx_capture_open+0x218/0x2d0 [em28xx_alsa]
[63276.842225]  [<ffffffffa012e835>] snd_pcm_open_substream+0x85/0x140 [snd_pcm]
[63276.842249]  [<ffffffffa012e9b2>] snd_pcm_open+0xc2/0x270 [snd_pcm]
[63276.842267]  [<ffffffff811d117c>] ? kmem_cache_alloc_trace+0x3c/0x200
[63276.842278]  [<ffffffffa0100d7a>] ? snd_card_file_add+0x2a/0xd0 [snd]
[63276.842288]  [<ffffffff810bf570>] ? wake_up_state+0x20/0x20
[63276.842300]  [<ffffffffa012eba3>] snd_pcm_capture_open+0x43/0x70 [snd_pcm]
[63276.842311]  [<ffffffffa0100594>] snd_open+0xb4/0x190 [snd]
[63276.842321]  [<ffffffff811f1e79>] chrdev_open+0xb9/0x1a0
[63276.842327]  [<ffffffff811ea7bf>] do_dentry_open+0x1ff/0x340
[63276.842333]  [<ffffffff811f1dc0>] ? cdev_put+0x30/0x30
[63276.842338]  [<ffffffff811eaad1>] finish_open+0x31/0x40
[63276.842343]  [<ffffffff811fca24>] do_last+0xa64/0x1190
[63276.842349]  [<ffffffff811f8d01>] ? link_path_walk+0x81/0x880
[63276.842355]  [<ffffffff811d1316>] ? kmem_cache_alloc_trace+0x1d6/0x200
[63276.842361]  [<ffffffff812edecc>] ? selinux_file_alloc_security+0x3c/0x60
[63276.842367]  [<ffffffff811fd21d>] path_openat+0xcd/0x670
[63276.842373]  [<ffffffff811f8779>] ? putname+0x29/0x40
[63276.842378]  [<ffffffff811fdf02>] ? user_path_at_empty+0x72/0xc0
[63276.842384]  [<ffffffff811fe01d>] do_filp_open+0x4d/0xb0
[63276.842391]  [<ffffffff8120a9fd>] ? __alloc_fd+0x7d/0x120
[63276.842396]  [<ffffffff811ec557>] do_sys_open+0x137/0x240
[63276.842402]  [<ffffffff811ec67e>] SyS_open+0x1e/0x20
[63276.842408]  [<ffffffff816fc869>] system_call_fastpath+0x16/0x1b
[63276.842412] ---[ end trace 9381964a5237f706 ]---
[63276.842415] ------------[ cut here ]------------
[63276.842422] WARNING: CPU: 1 PID: 1495 at lib/kobject.c:240 kobject_add_internal+0x284/0x3f0()
[63276.842425] kobject_add_internal failed for ep_82 with -EEXIST, don't try to register things with the same name in the same directory.
[63276.842428] Modules linked in: rc_hauppauge em28xx_rc rc_core lgdt330x em28xx_dvb dvb_core em28xx_alsa tuner_xc2028 tuner tvp5150 em28xx_v4l em28xx tveeprom fuse ip6table_filter ip6_tables bnep binfmt_misc vfat fat nouveau x86_pkg_temp_thermal coretemp kvm_intel kvm arc4 iwldvm mac80211 i915 uvcvideo iwlwifi ttm videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel crct10dif_pclmul media cfg80211 snd_hda_controller iTCO_wdt mxm_wmi i2c_algo_bit drm_kms_helper drm crc32_pclmul crc32c_intel ghash_clmulni_intel snd_hda_codec snd_hwdep iTCO_vendor_support btusb bluetooth snd_seq snd_seq_device snd_pcm snd_timer snd soundcore mei_me mei joydev i2c_i801 serio_raw microcode rfkill i2c_core lpc_ich mfd_core shpchp
[63276.842499]  wmi video r8169 mii
[63276.842506] CPU: 1 PID: 1495 Comm: pulseaudio Tainted: G        W     3.16.0-rc6+ #23
[63276.842509] Hardware name: SAMSUNG ELECTRONICS CO., LTD. 550P5C/550P7C/SAMSUNG_NP1234567890, BIOS P05ABI.016.130917.dg 09/17/2013
[63276.842512]  0000000000000000 0000000036bcbe1b ffff8800c1a13838 ffffffff816f523f
[63276.842516]  ffff8800c1a13880 ffff8800c1a13870 ffffffff8108be8d ffff880219ca4c20
[63276.842521]  00000000ffffffef ffff88021a364040 ffff880219ca4c10 ffff88021a763c58
[63276.842528] Call Trace:
[63276.842535]  [<ffffffff816f523f>] dump_stack+0x45/0x56
[63276.842541]  [<ffffffff8108be8d>] warn_slowpath_common+0x7d/0xa0
[63276.842546]  [<ffffffff8108bf0c>] warn_slowpath_fmt+0x5c/0x80
[63276.842564]  [<ffffffff81358544>] kobject_add_internal+0x284/0x3f0
[63276.842585]  [<ffffffff81358b75>] kobject_add+0x75/0xd0
[63276.842603]  [<ffffffff81462ae3>] ? device_private_init+0x23/0x80
[63276.842622]  [<ffffffff81462c65>] device_add+0x125/0x630
[63276.842638]  [<ffffffff8146318a>] device_register+0x1a/0x20
[63276.842658]  [<ffffffff814f2fa1>] usb_create_ep_devs+0x81/0xd0
[63276.842677]  [<ffffffff814eb69d>] create_intf_ep_devs+0x5d/0x80
[63276.842694]  [<ffffffff814ec585>] usb_set_interface+0x255/0x380
[63276.842715]  [<ffffffffa061c0a8>] snd_em28xx_capture_open+0x218/0x2d0 [em28xx_alsa]
[63276.842734]  [<ffffffffa012e835>] snd_pcm_open_substream+0x85/0x140 [snd_pcm]
[63276.842747]  [<ffffffffa012e9b2>] snd_pcm_open+0xc2/0x270 [snd_pcm]
[63276.842754]  [<ffffffff811d117c>] ? kmem_cache_alloc_trace+0x3c/0x200
[63276.842764]  [<ffffffffa0100d7a>] ? snd_card_file_add+0x2a/0xd0 [snd]
[63276.842771]  [<ffffffff810bf570>] ? wake_up_state+0x20/0x20
[63276.842784]  [<ffffffffa012eba3>] snd_pcm_capture_open+0x43/0x70 [snd_pcm]
[63276.842795]  [<ffffffffa0100594>] snd_open+0xb4/0x190 [snd]
[63276.842804]  [<ffffffff811f1e79>] chrdev_open+0xb9/0x1a0
[63276.842809]  [<ffffffff811ea7bf>] do_dentry_open+0x1ff/0x340
[63276.842815]  [<ffffffff811f1dc0>] ? cdev_put+0x30/0x30
[63276.842820]  [<ffffffff811eaad1>] finish_open+0x31/0x40
[63276.842826]  [<ffffffff811fca24>] do_last+0xa64/0x1190
[63276.842831]  [<ffffffff811f8d01>] ? link_path_walk+0x81/0x880
[63276.842839]  [<ffffffff811d1316>] ? kmem_cache_alloc_trace+0x1d6/0x200
[63276.842845]  [<ffffffff812edecc>] ? selinux_file_alloc_security+0x3c/0x60
[63276.842852]  [<ffffffff811fd21d>] path_openat+0xcd/0x670
[63276.842857]  [<ffffffff811f8779>] ? putname+0x29/0x40
[63276.842863]  [<ffffffff811fdf02>] ? user_path_at_empty+0x72/0xc0
[63276.842868]  [<ffffffff811fe01d>] do_filp_open+0x4d/0xb0
[63276.842877]  [<ffffffff8120a9fd>] ? __alloc_fd+0x7d/0x120
[63276.842882]  [<ffffffff811ec557>] do_sys_open+0x137/0x240
[63276.842887]  [<ffffffff811ec67e>] SyS_open+0x1e/0x20
[63276.842893]  [<ffffffff816fc869>] system_call_fastpath+0x16/0x1b
[63276.842897] ---[ end trace 9381964a5237f707 ]---
[63276.842909] ------------[ cut here ]------------
[63276.842914] WARNING: CPU: 1 PID: 1495 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x64/0x80()
[63276.842918] sysfs: cannot create duplicate filename '/devices/pci0000:00/0000:00:14.0/usb3/3-2/3-2:1.0/ep_83'
[63276.842920] Modules linked in: rc_hauppauge em28xx_rc rc_core lgdt330x em28xx_dvb dvb_core em28xx_alsa tuner_xc2028 tuner tvp5150 em28xx_v4l em28xx tveeprom fuse ip6table_filter ip6_tables bnep binfmt_misc vfat fat nouveau x86_pkg_temp_thermal coretemp kvm_intel kvm arc4 iwldvm mac80211 i915 uvcvideo iwlwifi ttm videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel crct10dif_pclmul media cfg80211 snd_hda_controller iTCO_wdt mxm_wmi i2c_algo_bit drm_kms_helper drm crc32_pclmul crc32c_intel ghash_clmulni_intel snd_hda_codec snd_hwdep iTCO_vendor_support btusb bluetooth snd_seq snd_seq_device snd_pcm snd_timer snd soundcore mei_me mei joydev i2c_i801 serio_raw microcode rfkill i2c_core lpc_ich mfd_core shpchp
[63276.843045]  wmi video r8169 mii
[63276.843052] CPU: 1 PID: 1495 Comm: pulseaudio Tainted: G        W     3.16.0-rc6+ #23
[63276.843056] Hardware name: SAMSUNG ELECTRONICS CO., LTD. 550P5C/550P7C/SAMSUNG_NP1234567890, BIOS P05ABI.016.130917.dg 09/17/2013
[63276.843059]  0000000000000000 0000000036bcbe1b ffff8800c1a137e8 ffffffff816f523f
[63276.843065]  ffff8800c1a13830 ffff8800c1a13820 ffffffff8108be8d ffff8800c7896000
[63276.843070]  ffff8800c7e07ea0 ffff8802217877f8 ffff880219ca4c10 ffff88021a763c58
[63276.843086] Call Trace:
[63276.843098]  [<ffffffff816f523f>] dump_stack+0x45/0x56
[63276.843104]  [<ffffffff8108be8d>] warn_slowpath_common+0x7d/0xa0
[63276.843109]  [<ffffffff8108bf0c>] warn_slowpath_fmt+0x5c/0x80
[63276.843115]  [<ffffffff81262b98>] ? kernfs_path+0x48/0x60
[63276.843122]  [<ffffffff812662a4>] sysfs_warn_dup+0x64/0x80
[63276.843134]  [<ffffffff8126634e>] sysfs_create_dir_ns+0x8e/0xa0
[63276.843141]  [<ffffffff8135837f>] kobject_add_internal+0xbf/0x3f0
[63276.843147]  [<ffffffff81358b75>] kobject_add+0x75/0xd0
[63276.843157]  [<ffffffff81462ae3>] ? device_private_init+0x23/0x80
[63276.843163]  [<ffffffff81462c65>] device_add+0x125/0x630
[63276.843171]  [<ffffffff8146318a>] device_register+0x1a/0x20
[63276.843182]  [<ffffffff814f2fa1>] usb_create_ep_devs+0x81/0xd0
[63276.843188]  [<ffffffff814eb69d>] create_intf_ep_devs+0x5d/0x80
[63276.843193]  [<ffffffff814ec585>] usb_set_interface+0x255/0x380
[63276.843204]  [<ffffffffa061c0a8>] snd_em28xx_capture_open+0x218/0x2d0 [em28xx_alsa]
[63276.843217]  [<ffffffffa012e835>] snd_pcm_open_substream+0x85/0x140 [snd_pcm]
[63276.843232]  [<ffffffffa012e9b2>] snd_pcm_open+0xc2/0x270 [snd_pcm]
[63276.843238]  [<ffffffff811d117c>] ? kmem_cache_alloc_trace+0x3c/0x200
[63276.843247]  [<ffffffffa0100d7a>] ? snd_card_file_add+0x2a/0xd0 [snd]
[63276.843254]  [<ffffffff810bf570>] ? wake_up_state+0x20/0x20
[63276.843262]  [<ffffffffa012eba3>] snd_pcm_capture_open+0x43/0x70 [snd_pcm]
[63276.843270]  [<ffffffffa0100594>] snd_open+0xb4/0x190 [snd]
[63276.843277]  [<ffffffff811f1e79>] chrdev_open+0xb9/0x1a0
[63276.843280]  [<ffffffff811ea7bf>] do_dentry_open+0x1ff/0x340
[63276.843284]  [<ffffffff811f1dc0>] ? cdev_put+0x30/0x30
[63276.843287]  [<ffffffff811eaad1>] finish_open+0x31/0x40
[63276.843293]  [<ffffffff811fca24>] do_last+0xa64/0x1190
[63276.843296]  [<ffffffff811f8d01>] ? link_path_walk+0x81/0x880
[63276.843300]  [<ffffffff811d1316>] ? kmem_cache_alloc_trace+0x1d6/0x200
[63276.843305]  [<ffffffff812edecc>] ? selinux_file_alloc_security+0x3c/0x60
[63276.843309]  [<ffffffff811fd21d>] path_openat+0xcd/0x670
[63276.843312]  [<ffffffff811f8779>] ? putname+0x29/0x40
[63276.843316]  [<ffffffff811fdf02>] ? user_path_at_empty+0x72/0xc0
[63276.843320]  [<ffffffff811fe01d>] do_filp_open+0x4d/0xb0
[63276.843325]  [<ffffffff8120a9fd>] ? __alloc_fd+0x7d/0x120
[63276.843330]  [<ffffffff811ec557>] do_sys_open+0x137/0x240
[63276.843334]  [<ffffffff811ec67e>] SyS_open+0x1e/0x20
[63276.843338]  [<ffffffff816fc869>] system_call_fastpath+0x16/0x1b
[63276.843340] ---[ end trace 9381964a5237f708 ]---
[63276.843342] ------------[ cut here ]------------
[63276.843347] WARNING: CPU: 1 PID: 1495 at lib/kobject.c:240 kobject_add_internal+0x284/0x3f0()
[63276.843349] kobject_add_internal failed for ep_83 with -EEXIST, don't try to register things with the same name in the same directory.
[63276.843350] Modules linked in: rc_hauppauge em28xx_rc rc_core lgdt330x em28xx_dvb dvb_core em28xx_alsa tuner_xc2028 tuner tvp5150 em28xx_v4l em28xx tveeprom fuse ip6table_filter ip6_tables bnep binfmt_misc vfat fat nouveau x86_pkg_temp_thermal coretemp kvm_intel kvm arc4 iwldvm mac80211 i915 uvcvideo iwlwifi ttm videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel crct10dif_pclmul media cfg80211 snd_hda_controller iTCO_wdt mxm_wmi i2c_algo_bit drm_kms_helper drm crc32_pclmul crc32c_intel ghash_clmulni_intel snd_hda_codec snd_hwdep iTCO_vendor_support btusb bluetooth snd_seq snd_seq_device snd_pcm snd_timer snd soundcore mei_me mei joydev i2c_i801 serio_raw microcode rfkill i2c_core lpc_ich mfd_core shpchp
[63276.843401]  wmi video r8169 mii
[63276.843405] CPU: 1 PID: 1495 Comm: pulseaudio Tainted: G        W     3.16.0-rc6+ #23
[63276.843407] Hardware name: SAMSUNG ELECTRONICS CO., LTD. 550P5C/550P7C/SAMSUNG_NP1234567890, BIOS P05ABI.016.130917.dg 09/17/2013
[63276.843409]  0000000000000000 0000000036bcbe1b ffff8800c1a13838 ffffffff816f523f
[63276.843412]  ffff8800c1a13880 ffff8800c1a13870 ffffffff8108be8d ffff880219ca4c20
[63276.843416]  00000000ffffffef ffff88021a364040 ffff880219ca4c10 ffff88021a763c58
[63276.843419] Call Trace:
[63276.843424]  [<ffffffff816f523f>] dump_stack+0x45/0x56
[63276.843427]  [<ffffffff8108be8d>] warn_slowpath_common+0x7d/0xa0
[63276.843431]  [<ffffffff8108bf0c>] warn_slowpath_fmt+0x5c/0x80
[63276.843435]  [<ffffffff81358544>] kobject_add_internal+0x284/0x3f0
[63276.843441]  [<ffffffff81358b75>] kobject_add+0x75/0xd0
[63276.843444]  [<ffffffff81462ae3>] ? device_private_init+0x23/0x80
[63276.843448]  [<ffffffff81462c65>] device_add+0x125/0x630
[63276.843451]  [<ffffffff8146318a>] device_register+0x1a/0x20
[63276.843456]  [<ffffffff814f2fa1>] usb_create_ep_devs+0x81/0xd0
[63276.843459]  [<ffffffff814eb69d>] create_intf_ep_devs+0x5d/0x80
[63276.843463]  [<ffffffff814ec585>] usb_set_interface+0x255/0x380
[63276.843467]  [<ffffffffa061c0a8>] snd_em28xx_capture_open+0x218/0x2d0 [em28xx_alsa]
[63276.843475]  [<ffffffffa012e835>] snd_pcm_open_substream+0x85/0x140 [snd_pcm]
[63276.843483]  [<ffffffffa012e9b2>] snd_pcm_open+0xc2/0x270 [snd_pcm]
[63276.843487]  [<ffffffff811d117c>] ? kmem_cache_alloc_trace+0x3c/0x200
[63276.843496]  [<ffffffffa0100d7a>] ? snd_card_file_add+0x2a/0xd0 [snd]
[63276.843501]  [<ffffffff810bf570>] ? wake_up_state+0x20/0x20
[63276.843508]  [<ffffffffa012eba3>] snd_pcm_capture_open+0x43/0x70 [snd_pcm]
[63276.843516]  [<ffffffffa0100594>] snd_open+0xb4/0x190 [snd]
[63276.843523]  [<ffffffff811f1e79>] chrdev_open+0xb9/0x1a0
[63276.843526]  [<ffffffff811ea7bf>] do_dentry_open+0x1ff/0x340
[63276.843530]  [<ffffffff811f1dc0>] ? cdev_put+0x30/0x30
[63276.843535]  [<ffffffff811eaad1>] finish_open+0x31/0x40
[63276.843538]  [<ffffffff811fca24>] do_last+0xa64/0x1190
[63276.843542]  [<ffffffff811f8d01>] ? link_path_walk+0x81/0x880
[63276.843546]  [<ffffffff811d1316>] ? kmem_cache_alloc_trace+0x1d6/0x200
[63276.843550]  [<ffffffff812edecc>] ? selinux_file_alloc_security+0x3c/0x60
[63276.843554]  [<ffffffff811fd21d>] path_openat+0xcd/0x670
[63276.843558]  [<ffffffff811f8779>] ? putname+0x29/0x40
[63276.843562]  [<ffffffff811fdf02>] ? user_path_at_empty+0x72/0xc0
[63276.843566]  [<ffffffff811fe01d>] do_filp_open+0x4d/0xb0
[63276.843570]  [<ffffffff8120a9fd>] ? __alloc_fd+0x7d/0x120
[63276.843575]  [<ffffffff811ec557>] do_sys_open+0x137/0x240
[63276.843579]  [<ffffffff811ec67e>] SyS_open+0x1e/0x20
[63276.843583]  [<ffffffff816fc869>] system_call_fastpath+0x16/0x1b
[63276.843585] ---[ end trace 9381964a5237f709 ]---
[63276.843593] ------------[ cut here ]------------
[63276.843596] WARNING: CPU: 1 PID: 1495 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x64/0x80()
[63276.843598] sysfs: cannot create duplicate filename '/devices/pci0000:00/0000:00:14.0/usb3/3-2/3-2:1.0/ep_84'
[63276.843600] Modules linked in: rc_hauppauge em28xx_rc rc_core lgdt330x em28xx_dvb dvb_core em28xx_alsa tuner_xc2028 tuner tvp5150 em28xx_v4l em28xx tveeprom fuse ip6table_filter ip6_tables bnep binfmt_misc vfat fat nouveau x86_pkg_temp_thermal coretemp kvm_intel kvm arc4 iwldvm mac80211 i915 uvcvideo iwlwifi ttm videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel crct10dif_pclmul media cfg80211 snd_hda_controller iTCO_wdt mxm_wmi i2c_algo_bit drm_kms_helper drm crc32_pclmul crc32c_intel ghash_clmulni_intel snd_hda_codec snd_hwdep iTCO_vendor_support btusb bluetooth snd_seq snd_seq_device snd_pcm snd_timer snd soundcore mei_me mei joydev i2c_i801 serio_raw microcode rfkill i2c_core lpc_ich mfd_core shpchp
[63276.843650]  wmi video r8169 mii
[63276.843654] CPU: 1 PID: 1495 Comm: pulseaudio Tainted: G        W     3.16.0-rc6+ #23
[63276.843656] Hardware name: SAMSUNG ELECTRONICS CO., LTD. 550P5C/550P7C/SAMSUNG_NP1234567890, BIOS P05ABI.016.130917.dg 09/17/2013
[63276.843657]  0000000000000000 0000000036bcbe1b ffff8800c1a137e8 ffffffff816f523f
[63276.843661]  ffff8800c1a13830 ffff8800c1a13820 ffffffff8108be8d ffff8800c7896000
[63276.843664]  ffff8800c7e07ea0 ffff8802217877f8 ffff880219ca4c10 ffff88021a763c58
[63276.843668] Call Trace:
[63276.843672]  [<ffffffff816f523f>] dump_stack+0x45/0x56
[63276.843675]  [<ffffffff8108be8d>] warn_slowpath_common+0x7d/0xa0
[63276.843679]  [<ffffffff8108bf0c>] warn_slowpath_fmt+0x5c/0x80
[63276.843683]  [<ffffffff81262b98>] ? kernfs_path+0x48/0x60
[63276.843688]  [<ffffffff812662a4>] sysfs_warn_dup+0x64/0x80
[63276.843691]  [<ffffffff8126634e>] sysfs_create_dir_ns+0x8e/0xa0
[63276.843695]  [<ffffffff8135837f>] kobject_add_internal+0xbf/0x3f0
[63276.843699]  [<ffffffff81358b75>] kobject_add+0x75/0xd0
[63276.843703]  [<ffffffff81462ae3>] ? device_private_init+0x23/0x80
[63276.843706]  [<ffffffff81462c65>] device_add+0x125/0x630
[63276.843709]  [<ffffffff8146318a>] device_register+0x1a/0x20
[63276.843714]  [<ffffffff814f2fa1>] usb_create_ep_devs+0x81/0xd0
[63276.843717]  [<ffffffff814eb69d>] create_intf_ep_devs+0x5d/0x80
[63276.843721]  [<ffffffff814ec585>] usb_set_interface+0x255/0x380
[63276.843727]  [<ffffffffa061c0a8>] snd_em28xx_capture_open+0x218/0x2d0 [em28xx_alsa]
[63276.843734]  [<ffffffffa012e835>] snd_pcm_open_substream+0x85/0x140 [snd_pcm]
[63276.843742]  [<ffffffffa012e9b2>] snd_pcm_open+0xc2/0x270 [snd_pcm]
[63276.843746]  [<ffffffff811d117c>] ? kmem_cache_alloc_trace+0x3c/0x200
[63276.843753]  [<ffffffffa0100d7a>] ? snd_card_file_add+0x2a/0xd0 [snd]
[63276.843758]  [<ffffffff810bf570>] ? wake_up_state+0x20/0x20
[63276.843767]  [<ffffffffa012eba3>] snd_pcm_capture_open+0x43/0x70 [snd_pcm]
[63276.843775]  [<ffffffffa0100594>] snd_open+0xb4/0x190 [snd]
[63276.843781]  [<ffffffff811f1e79>] chrdev_open+0xb9/0x1a0
[63276.843784]  [<ffffffff811ea7bf>] do_dentry_open+0x1ff/0x340
[63276.843788]  [<ffffffff811f1dc0>] ? cdev_put+0x30/0x30
[63276.843792]  [<ffffffff811eaad1>] finish_open+0x31/0x40
[63276.843795]  [<ffffffff811fca24>] do_last+0xa64/0x1190
[63276.843800]  [<ffffffff811f8d01>] ? link_path_walk+0x81/0x880
[63276.843804]  [<ffffffff811d1316>] ? kmem_cache_alloc_trace+0x1d6/0x200
[63276.843809]  [<ffffffff812edecc>] ? selinux_file_alloc_security+0x3c/0x60
[63276.843813]  [<ffffffff811fd21d>] path_openat+0xcd/0x670
[63276.843816]  [<ffffffff811f8779>] ? putname+0x29/0x40
[63276.843820]  [<ffffffff811fdf02>] ? user_path_at_empty+0x72/0xc0
[63276.843824]  [<ffffffff811fe01d>] do_filp_open+0x4d/0xb0
[63276.843829]  [<ffffffff8120a9fd>] ? __alloc_fd+0x7d/0x120
[63276.843832]  [<ffffffff811ec557>] do_sys_open+0x137/0x240
[63276.843836]  [<ffffffff811ec67e>] SyS_open+0x1e/0x20
[63276.843841]  [<ffffffff816fc869>] system_call_fastpath+0x16/0x1b
[63276.843843] ---[ end trace 9381964a5237f70a ]---
[63276.843845] ------------[ cut here ]------------
[63276.843849] WARNING: CPU: 1 PID: 1495 at lib/kobject.c:240 kobject_add_internal+0x284/0x3f0()
[63276.843851] kobject_add_internal failed for ep_84 with -EEXIST, don't try to register things with the same name in the same directory.
[63276.843852] Modules linked in: rc_hauppauge em28xx_rc rc_core lgdt330x em28xx_dvb dvb_core em28xx_alsa tuner_xc2028 tuner tvp5150 em28xx_v4l em28xx tveeprom fuse ip6table_filter ip6_tables bnep binfmt_misc vfat fat nouveau x86_pkg_temp_thermal coretemp kvm_intel kvm arc4 iwldvm mac80211 i915 uvcvideo iwlwifi ttm videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel crct10dif_pclmul media cfg80211 snd_hda_controller iTCO_wdt mxm_wmi i2c_algo_bit drm_kms_helper drm crc32_pclmul crc32c_intel ghash_clmulni_intel snd_hda_codec snd_hwdep iTCO_vendor_support btusb bluetooth snd_seq snd_seq_device snd_pcm snd_timer snd soundcore mei_me mei joydev i2c_i801 serio_raw microcode rfkill i2c_core lpc_ich mfd_core shpchp
[63276.843901]  wmi video r8169 mii
[63276.843905] CPU: 1 PID: 1495 Comm: pulseaudio Tainted: G        W     3.16.0-rc6+ #23
[63276.843907] Hardware name: SAMSUNG ELECTRONICS CO., LTD. 550P5C/550P7C/SAMSUNG_NP1234567890, BIOS P05ABI.016.130917.dg 09/17/2013
[63276.843908]  0000000000000000 0000000036bcbe1b ffff8800c1a13838 ffffffff816f523f
[63276.843913]  ffff8800c1a13880 ffff8800c1a13870 ffffffff8108be8d ffff880219ca4c20
[63276.843917]  00000000ffffffef ffff88021a364040 ffff880219ca4c10 ffff88021a763c58
[63276.843920] Call Trace:
[63276.843924]  [<ffffffff816f523f>] dump_stack+0x45/0x56
[63276.843928]  [<ffffffff8108be8d>] warn_slowpath_common+0x7d/0xa0
[63276.843931]  [<ffffffff8108bf0c>] warn_slowpath_fmt+0x5c/0x80
[63276.843936]  [<ffffffff81358544>] kobject_add_internal+0x284/0x3f0
[63276.843940]  [<ffffffff81358b75>] kobject_add+0x75/0xd0
[63276.843943]  [<ffffffff81462ae3>] ? device_private_init+0x23/0x80
[63276.843948]  [<ffffffff81462c65>] device_add+0x125/0x630
[63276.843951]  [<ffffffff8146318a>] device_register+0x1a/0x20
[63276.843956]  [<ffffffff814f2fa1>] usb_create_ep_devs+0x81/0xd0
[63276.843959]  [<ffffffff814eb69d>] create_intf_ep_devs+0x5d/0x80
[63276.843962]  [<ffffffff814ec585>] usb_set_interface+0x255/0x380
[63276.843967]  [<ffffffffa061c0a8>] snd_em28xx_capture_open+0x218/0x2d0 [em28xx_alsa]
[63276.843974]  [<ffffffffa012e835>] snd_pcm_open_substream+0x85/0x140 [snd_pcm]
[63276.843983]  [<ffffffffa012e9b2>] snd_pcm_open+0xc2/0x270 [snd_pcm]
[63276.844011]  [<ffffffff811d117c>] ? kmem_cache_alloc_trace+0x3c/0x200
[63276.844034]  [<ffffffffa0100d7a>] ? snd_card_file_add+0x2a/0xd0 [snd]
[63276.844056]  [<ffffffff810bf570>] ? wake_up_state+0x20/0x20
[63276.844079]  [<ffffffffa012eba3>] snd_pcm_capture_open+0x43/0x70 [snd_pcm]
[63276.844104]  [<ffffffffa0100594>] snd_open+0xb4/0x190 [snd]
[63276.844123]  [<ffffffff811f1e79>] chrdev_open+0xb9/0x1a0
[63276.844143]  [<ffffffff811ea7bf>] do_dentry_open+0x1ff/0x340
[63276.844161]  [<ffffffff811f1dc0>] ? cdev_put+0x30/0x30
[63276.844180]  [<ffffffff811eaad1>] finish_open+0x31/0x40
[63276.844197]  [<ffffffff811fca24>] do_last+0xa64/0x1190
[63276.844217]  [<ffffffff811f8d01>] ? link_path_walk+0x81/0x880
[63276.844224]  [<ffffffff811d1316>] ? kmem_cache_alloc_trace+0x1d6/0x200
[63276.844230]  [<ffffffff812edecc>] ? selinux_file_alloc_security+0x3c/0x60
[63276.844237]  [<ffffffff811fd21d>] path_openat+0xcd/0x670
[63276.844242]  [<ffffffff811f8779>] ? putname+0x29/0x40
[63276.844250]  [<ffffffff811fdf02>] ? user_path_at_empty+0x72/0xc0
[63276.844256]  [<ffffffff811fe01d>] do_filp_open+0x4d/0xb0
[63276.844262]  [<ffffffff8120a9fd>] ? __alloc_fd+0x7d/0x120
[63276.844267]  [<ffffffff811ec557>] do_sys_open+0x137/0x240
[63276.844273]  [<ffffffff811ec67e>] SyS_open+0x1e/0x20
[63276.844279]  [<ffffffff816fc869>] system_call_fastpath+0x16/0x1b
[63276.844283] ---[ end trace 9381964a5237f70b ]---
[63276.947086] xc2028 19-0061: Loading firmware for type=BASE MTS (5), id 0000000000000000.
[63277.889918] xc2028 19-0061: Loading firmware for type=MTS (4), id 000000000000b700.
[63277.904978] xc2028 19-0061: Loading SCODE for type=MTS LCD NOGD MONO IF SCODE HAS_IF_4500 (6002b004), id 000000000000b700.
[63279.266689] tvp5150 19-005c: i2c i/o error: rc == -6
[63279.273050] tvp5150 19-005c: i2c i/o error: rc == -6
[63279.322160] tvp5150 19-005c: i2c i/o error: rc == -6
[63279.323365] tvp5150 19-005c: i2c i/o error: rc == -6
[63279.372175] xc2028 19-0061: Loading firmware for type=BASE MTS (5), id 0000000000000000.
[63280.357379] xc2028 19-0061: Loading firmware for type=MTS (4), id 000000000000b700.
[63280.374595] xc2028 19-0061: Loading SCODE for type=MTS LCD NOGD MONO IF SCODE HAS_IF_4500 (6002b004), id 000000000000b700.
[63280.544446] ------------[ cut here ]------------
[63280.544469] WARNING: CPU: 4 PID: 14819 at drivers/media/v4l2-core/videobuf2-core.c:2126 __vb2_queue_cancel+0x1b1/0x260 [videobuf2_core]()
[63280.544472] Modules linked in: rc_hauppauge em28xx_rc rc_core lgdt330x em28xx_dvb dvb_core em28xx_alsa tuner_xc2028 tuner tvp5150 em28xx_v4l em28xx tveeprom fuse ip6table_filter ip6_tables bnep binfmt_misc vfat fat nouveau x86_pkg_temp_thermal coretemp kvm_intel kvm arc4 iwldvm mac80211 i915 uvcvideo iwlwifi ttm videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel crct10dif_pclmul media cfg80211 snd_hda_controller iTCO_wdt mxm_wmi i2c_algo_bit drm_kms_helper drm crc32_pclmul crc32c_intel ghash_clmulni_intel snd_hda_codec snd_hwdep iTCO_vendor_support btusb bluetooth snd_seq snd_seq_device snd_pcm snd_timer snd soundcore mei_me mei joydev i2c_i801 serio_raw microcode rfkill i2c_core lpc_ich mfd_core shpchp
[63280.544534]  wmi video r8169 mii
[63280.544542] CPU: 4 PID: 14819 Comm: xawtv Tainted: G        W     3.16.0-rc6+ #23
[63280.544545] Hardware name: SAMSUNG ELECTRONICS CO., LTD. 550P5C/550P7C/SAMSUNG_NP1234567890, BIOS P05ABI.016.130917.dg 09/17/2013
[63280.544547]  0000000000000000 00000000172d2101 ffff8800c8b9bc08 ffffffff816f523f
[63280.544552]  0000000000000000 ffff8800c8b9bc40 ffffffff8108be8d 0000000000000000
[63280.544556]  0000000000000001 ffff8800c5488948 ffff88021a5b4a00 0000000000000000
[63280.544560] Call Trace:
[63280.544571]  [<ffffffff816f523f>] dump_stack+0x45/0x56
[63280.544577]  [<ffffffff8108be8d>] warn_slowpath_common+0x7d/0xa0
[63280.544581]  [<ffffffff8108bfba>] warn_slowpath_null+0x1a/0x20
[63280.544589]  [<ffffffffa0319951>] __vb2_queue_cancel+0x1b1/0x260 [videobuf2_core]
[63280.544597]  [<ffffffffa031a2c5>] vb2_internal_streamoff+0x35/0x90 [videobuf2_core]
[63280.544603]  [<ffffffffa031a355>] vb2_streamoff+0x35/0x60 [videobuf2_core]
[63280.544610]  [<ffffffffa031a3c8>] vb2_ioctl_streamoff+0x48/0x50 [videobuf2_core]
[63280.544619]  [<ffffffffa02f0a8a>] v4l_streamoff+0x1a/0x20 [videodev]
[63280.544628]  [<ffffffffa02f39c4>] __video_do_ioctl+0x294/0x310 [videodev]
[63280.544637]  [<ffffffffa02f63be>] video_usercopy+0x22e/0x5b0 [videodev]
[63280.544645]  [<ffffffffa02f3730>] ? v4l_dbg_s_register+0x150/0x150 [videodev]
[63280.544654]  [<ffffffffa02f6755>] video_ioctl2+0x15/0x20 [videodev]
[63280.544662]  [<ffffffffa02ef71b>] v4l2_ioctl+0x11b/0x150 [videodev]
[63280.544669]  [<ffffffff81200640>] do_vfs_ioctl+0x2e0/0x4a0
[63280.544674]  [<ffffffff81200881>] SyS_ioctl+0x81/0xa0
[63280.544681]  [<ffffffff81122656>] ? __audit_syscall_exit+0x1f6/0x2a0
[63280.544688]  [<ffffffff816fc869>] system_call_fastpath+0x16/0x1b
[63280.544690] ---[ end trace 9381964a5237f70c ]---
[63287.078863] tvp5150 19-005c: i2c i/o error: rc == -6
[63287.136674] tvp5150 19-005c: i2c i/o error: rc == -6
[63287.263527] ------------[ cut here ]------------
[63287.263537] WARNING: CPU: 4 PID: 14819 at drivers/media/v4l2-core/videobuf2-core.c:2126 __vb2_queue_cancel+0x1b1/0x260 [videobuf2_core]()
[63287.263538] Modules linked in: rc_hauppauge em28xx_rc rc_core lgdt330x em28xx_dvb dvb_core em28xx_alsa tuner_xc2028 tuner tvp5150 em28xx_v4l em28xx tveeprom fuse ip6table_filter ip6_tables bnep binfmt_misc vfat fat nouveau x86_pkg_temp_thermal coretemp kvm_intel kvm arc4 iwldvm mac80211 i915 uvcvideo iwlwifi ttm videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel crct10dif_pclmul media cfg80211 snd_hda_controller iTCO_wdt mxm_wmi i2c_algo_bit drm_kms_helper drm crc32_pclmul crc32c_intel ghash_clmulni_intel snd_hda_codec snd_hwdep iTCO_vendor_support btusb bluetooth snd_seq snd_seq_device snd_pcm snd_timer snd soundcore mei_me mei joydev i2c_i801 serio_raw microcode rfkill i2c_core lpc_ich mfd_core shpchp
[63287.263567]  wmi video r8169 mii
[63287.263570] CPU: 4 PID: 14819 Comm: xawtv Tainted: G        W     3.16.0-rc6+ #23
[63287.263572] Hardware name: SAMSUNG ELECTRONICS CO., LTD. 550P5C/550P7C/SAMSUNG_NP1234567890, BIOS P05ABI.016.130917.dg 09/17/2013
[63287.263573]  0000000000000000 00000000172d2101 ffff8800c8b9bd60 ffffffff816f523f
[63287.263575]  0000000000000000 ffff8800c8b9bd98 ffffffff8108be8d 0000000000000000
[63287.263576]  ffff8800c5488da8 ffff8800c5488948 ffff8800c5488800 ffff8800c54887a0
[63287.263578] Call Trace:
[63287.263583]  [<ffffffff816f523f>] dump_stack+0x45/0x56
[63287.263586]  [<ffffffff8108be8d>] warn_slowpath_common+0x7d/0xa0
[63287.263588]  [<ffffffff8108bfba>] warn_slowpath_null+0x1a/0x20
[63287.263591]  [<ffffffffa0319951>] __vb2_queue_cancel+0x1b1/0x260 [videobuf2_core]
[63287.263594]  [<ffffffff814eb69d>] ? create_intf_ep_devs+0x5d/0x80
[63287.263598]  [<ffffffffa031c62a>] vb2_queue_release+0x1a/0x30 [videobuf2_core]
[63287.263600]  [<ffffffffa031c6a1>] _vb2_fop_release+0x61/0xa0 [videobuf2_core]
[63287.263603]  [<ffffffffa031c70a>] vb2_fop_release+0x2a/0x50 [videobuf2_core]
[63287.263606]  [<ffffffffa0752194>] em28xx_v4l2_close+0xf4/0x1d0 [em28xx_v4l]
[63287.263610]  [<ffffffffa02ef498>] v4l2_release+0x38/0x80 [videodev]
[63287.263613]  [<ffffffff811ef11c>] __fput+0xdc/0x1e0
[63287.263615]  [<ffffffff811ef26e>] ____fput+0xe/0x10
[63287.263618]  [<ffffffff810ab9df>] task_work_run+0x9f/0xe0
[63287.263620]  [<ffffffff81013b71>] do_notify_resume+0x61/0xa0
[63287.263623]  [<ffffffff816fcb22>] int_signal+0x12/0x17
[63287.263624] ---[ end trace 9381964a5237f70d ]---


> 
> 	Hans
> 
> > 
> > Regards,
> > 
> > 	Hans
> > 
> > --
> > To unsubscribe from this list: send the line "unsubscribe linux-media" in
> > the body of a message to majordomo@vger.kernel.org
> > More majordomo info at  http://vger.kernel.org/majordomo-info.html
> > 
> 
> --
> To unsubscribe from this list: send the line "unsubscribe linux-media" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

^ permalink raw reply	[flat|nested] 10+ messages in thread

* Re: [PATCH 0/4] vb2/saa7134 regression/documentation fixes
  2014-09-18 16:21   ` Mauro Carvalho Chehab
@ 2014-09-18 16:26     ` Hans Verkuil
  0 siblings, 0 replies; 10+ messages in thread
From: Hans Verkuil @ 2014-09-18 16:26 UTC (permalink / raw)
  To: Mauro Carvalho Chehab; +Cc: linux-media

On 09/18/2014 06:21 PM, Mauro Carvalho Chehab wrote:
> Em Wed, 17 Sep 2014 18:06:02 +0200
> Hans Verkuil <hverkuil@xs4all.nl> escreveu:
> 
>> On 09/17/2014 11:14 AM, Hans Verkuil wrote:
>>> This fixes the VBI regression seen in saa7134 when it was converted
>>> to vb2. Tested with my saa7134 board.
>>>
>>> It also updates the poll documentation and fixes a saa7134 bug where
>>> the WSS signal was never captured.
>>>
>>> The first patch should go to 3.17. It won't apply to older kernels,
>>> so I guess once this is merged we should post a patch to stable for
>>> those older kernels, certainly 3.16.
>>>
>>> I would expect this to be an issue for em28xx as well, but I will
>>> need to test that. If that driver is affected as well, then this
>>> fix needs to go into 3.9 and up.
>>
>> Update: the VBI apps won't work with the em28xx driver as I suspected.
>> With the fix all is fine for em28xx.
> 
> At least here, em28xx with one application (xawtv or qv4l2) reading
> at video0 and another one for vbi (mtt or zvbi), I'm getting the
> errors below. Clearly, it is not just the poll syscall that it is
> wrong on VB2 and/or em28xx.
> 
> I'm trying to identify what else is wrong there.

At least the queue_cancel warning is fixed by this:

https://www.mail-archive.com/linux-media@vger.kernel.org/msg78063.html

which is in the devel branch but not in the master branch.

Regards,

	Hans

> 
> Regards,
> Mauro
> 
> [63271.912808] ------------[ cut here ]------------
> [63271.912832] WARNING: CPU: 5 PID: 14761 at drivers/media/v4l2-core/videobuf2-core.c:2126 __vb2_queue_cancel+0x1b1/0x260 [videobuf2_core]()
> [63271.912835] Modules linked in: rc_hauppauge em28xx_rc rc_core lgdt330x em28xx_dvb dvb_core em28xx_alsa tuner_xc2028 tuner tvp5150 em28xx_v4l em28xx tveeprom fuse ip6table_filter ip6_tables bnep binfmt_misc vfat fat nouveau x86_pkg_temp_thermal coretemp kvm_intel kvm arc4 iwldvm mac80211 i915 uvcvideo iwlwifi ttm videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel crct10dif_pclmul media cfg80211 snd_hda_controller iTCO_wdt mxm_wmi i2c_algo_bit drm_kms_helper drm crc32_pclmul crc32c_intel ghash_clmulni_intel snd_hda_codec snd_hwdep iTCO_vendor_support btusb bluetooth snd_seq snd_seq_device snd_pcm snd_timer snd soundcore mei_me mei joydev i2c_i801 serio_raw microcode rfkill i2c_core lpc_ich mfd_core shpchp
> [63271.913037]  wmi video r8169 mii
> [63271.913048] CPU: 5 PID: 14761 Comm: xawtv Not tainted 3.16.0-rc6+ #23
> [63271.913055] Hardware name: SAMSUNG ELECTRONICS CO., LTD. 550P5C/550P7C/SAMSUNG_NP1234567890, BIOS P05ABI.016.130917.dg 09/17/2013
> [63271.913059]  0000000000000000 00000000051c953c ffff8800c4957c08 ffffffff816f523f
> [63271.913067]  0000000000000000 ffff8800c4957c40 ffffffff8108be8d 0000000000000000
> [63271.913072]  0000000000000001 ffff8800c5488948 ffff88003dd35500 0000000000000000
> [63271.913081] Call Trace:
> [63271.913098]  [<ffffffff816f523f>] dump_stack+0x45/0x56
> [63271.913108]  [<ffffffff8108be8d>] warn_slowpath_common+0x7d/0xa0
> [63271.913115]  [<ffffffff8108bfba>] warn_slowpath_null+0x1a/0x20
> [63271.913137]  [<ffffffffa0319951>] __vb2_queue_cancel+0x1b1/0x260 [videobuf2_core]
> [63271.913155]  [<ffffffffa031a2c5>] vb2_internal_streamoff+0x35/0x90 [videobuf2_core]
> [63271.913171]  [<ffffffffa031a355>] vb2_streamoff+0x35/0x60 [videobuf2_core]
> [63271.913184]  [<ffffffffa031a3c8>] vb2_ioctl_streamoff+0x48/0x50 [videobuf2_core]
> [63271.913200]  [<ffffffffa02f0a8a>] v4l_streamoff+0x1a/0x20 [videodev]
> [63271.913215]  [<ffffffffa02f39c4>] __video_do_ioctl+0x294/0x310 [videodev]
> [63271.913231]  [<ffffffffa02f63be>] video_usercopy+0x22e/0x5b0 [videodev]
> [63271.913244]  [<ffffffffa02f3730>] ? v4l_dbg_s_register+0x150/0x150 [videodev]
> [63271.913258]  [<ffffffff810d26f1>] ? remove_wait_queue+0x31/0x40
> [63271.913269]  [<ffffffff81425f92>] ? n_tty_write+0x392/0x510
> [63271.913283]  [<ffffffffa02f6755>] video_ioctl2+0x15/0x20 [videodev]
> [63271.913295]  [<ffffffffa02ef71b>] v4l2_ioctl+0x11b/0x150 [videodev]
> [63271.913304]  [<ffffffff81200640>] do_vfs_ioctl+0x2e0/0x4a0
> [63271.913310]  [<ffffffff81200881>] SyS_ioctl+0x81/0xa0
> [63271.913319]  [<ffffffff81122656>] ? __audit_syscall_exit+0x1f6/0x2a0
> [63271.913328]  [<ffffffff816fc869>] system_call_fastpath+0x16/0x1b
> [63271.913333] ---[ end trace 9381964a5237f703 ]---
> [63276.841245] ------------[ cut here ]------------
> [63276.841256] WARNING: CPU: 1 PID: 1495 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x64/0x80()
> [63276.841258] sysfs: cannot create duplicate filename '/devices/pci0000:00/0000:00:14.0/usb3/3-2/3-2:1.0/ep_81'
> [63276.841260] Modules linked in: rc_hauppauge em28xx_rc rc_core lgdt330x em28xx_dvb dvb_core em28xx_alsa tuner_xc2028 tuner tvp5150 em28xx_v4l em28xx tveeprom fuse ip6table_filter ip6_tables bnep binfmt_misc vfat fat nouveau x86_pkg_temp_thermal coretemp kvm_intel kvm arc4 iwldvm mac80211 i915 uvcvideo iwlwifi ttm videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel crct10dif_pclmul media cfg80211 snd_hda_controller iTCO_wdt mxm_wmi i2c_algo_bit drm_kms_helper drm crc32_pclmul crc32c_intel ghash_clmulni_intel snd_hda_codec snd_hwdep iTCO_vendor_support btusb bluetooth snd_seq snd_seq_device snd_pcm snd_timer snd soundcore mei_me mei joydev i2c_i801 serio_raw microcode rfkill i2c_core lpc_ich mfd_core shpchp
> [63276.841326]  wmi video r8169 mii
> [63276.841333] CPU: 1 PID: 1495 Comm: pulseaudio Tainted: G        W     3.16.0-rc6+ #23
> [63276.841335] Hardware name: SAMSUNG ELECTRONICS CO., LTD. 550P5C/550P7C/SAMSUNG_NP1234567890, BIOS P05ABI.016.130917.dg 09/17/2013
> [63276.841337]  0000000000000000 0000000036bcbe1b ffff8800c1a137e8 ffffffff816f523f
> [63276.841342]  ffff8800c1a13830 ffff8800c1a13820 ffffffff8108be8d ffff8800c7896000
> [63276.841345]  ffff8800c7e07ea0 ffff8802217877f8 ffff880219ca4c10 ffff88021a763c58
> [63276.841349] Call Trace:
> [63276.841359]  [<ffffffff816f523f>] dump_stack+0x45/0x56
> [63276.841364]  [<ffffffff8108be8d>] warn_slowpath_common+0x7d/0xa0
> [63276.841368]  [<ffffffff8108bf0c>] warn_slowpath_fmt+0x5c/0x80
> [63276.841373]  [<ffffffff81262b98>] ? kernfs_path+0x48/0x60
> [63276.841376]  [<ffffffff812662a4>] sysfs_warn_dup+0x64/0x80
> [63276.841380]  [<ffffffff8126634e>] sysfs_create_dir_ns+0x8e/0xa0
> [63276.841387]  [<ffffffff8135837f>] kobject_add_internal+0xbf/0x3f0
> [63276.841391]  [<ffffffff81358b75>] kobject_add+0x75/0xd0
> [63276.841396]  [<ffffffff81462ae3>] ? device_private_init+0x23/0x80
> [63276.841400]  [<ffffffff81462c65>] device_add+0x125/0x630
> [63276.841403]  [<ffffffff8146318a>] device_register+0x1a/0x20
> [63276.841410]  [<ffffffff814f2fa1>] usb_create_ep_devs+0x81/0xd0
> [63276.841414]  [<ffffffff814ec2c5>] ? usb_enable_endpoint+0x85/0x90
> [63276.841418]  [<ffffffff814eb69d>] create_intf_ep_devs+0x5d/0x80
> [63276.841421]  [<ffffffff814ec585>] usb_set_interface+0x255/0x380
> [63276.841428]  [<ffffffffa061c0a8>] snd_em28xx_capture_open+0x218/0x2d0 [em28xx_alsa]
> [63276.841439]  [<ffffffffa012e835>] snd_pcm_open_substream+0x85/0x140 [snd_pcm]
> [63276.841448]  [<ffffffffa012e9b2>] snd_pcm_open+0xc2/0x270 [snd_pcm]
> [63276.841454]  [<ffffffff811d117c>] ? kmem_cache_alloc_trace+0x3c/0x200
> [63276.841463]  [<ffffffffa0100d7a>] ? snd_card_file_add+0x2a/0xd0 [snd]
> [63276.841469]  [<ffffffff810bf570>] ? wake_up_state+0x20/0x20
> [63276.841478]  [<ffffffffa012eba3>] snd_pcm_capture_open+0x43/0x70 [snd_pcm]
> [63276.841486]  [<ffffffffa0100594>] snd_open+0xb4/0x190 [snd]
> [63276.841494]  [<ffffffff811f1e79>] chrdev_open+0xb9/0x1a0
> [63276.841498]  [<ffffffff811ea7bf>] do_dentry_open+0x1ff/0x340
> [63276.841503]  [<ffffffff811f1dc0>] ? cdev_put+0x30/0x30
> [63276.841506]  [<ffffffff811eaad1>] finish_open+0x31/0x40
> [63276.841510]  [<ffffffff811fca24>] do_last+0xa64/0x1190
> [63276.841514]  [<ffffffff811f8d01>] ? link_path_walk+0x81/0x880
> [63276.841518]  [<ffffffff811d1316>] ? kmem_cache_alloc_trace+0x1d6/0x200
> [63276.841524]  [<ffffffff812edecc>] ? selinux_file_alloc_security+0x3c/0x60
> [63276.841529]  [<ffffffff811fd21d>] path_openat+0xcd/0x670
> [63276.841532]  [<ffffffff811f8779>] ? putname+0x29/0x40
> [63276.841536]  [<ffffffff811fdf02>] ? user_path_at_empty+0x72/0xc0
> [63276.841540]  [<ffffffff811fe01d>] do_filp_open+0x4d/0xb0
> [63276.841546]  [<ffffffff8120a9fd>] ? __alloc_fd+0x7d/0x120
> [63276.841549]  [<ffffffff811ec557>] do_sys_open+0x137/0x240
> [63276.841553]  [<ffffffff811ec67e>] SyS_open+0x1e/0x20
> [63276.841558]  [<ffffffff816fc869>] system_call_fastpath+0x16/0x1b
> [63276.841561] ---[ end trace 9381964a5237f704 ]---
> [63276.841563] ------------[ cut here ]------------
> [63276.841568] WARNING: CPU: 1 PID: 1495 at lib/kobject.c:240 kobject_add_internal+0x284/0x3f0()
> [63276.841570] kobject_add_internal failed for ep_81 with -EEXIST, don't try to register things with the same name in the same directory.
> [63276.841572] Modules linked in: rc_hauppauge em28xx_rc rc_core lgdt330x em28xx_dvb dvb_core em28xx_alsa tuner_xc2028 tuner tvp5150 em28xx_v4l em28xx tveeprom fuse ip6table_filter ip6_tables bnep binfmt_misc vfat fat nouveau x86_pkg_temp_thermal coretemp kvm_intel kvm arc4 iwldvm mac80211 i915 uvcvideo iwlwifi ttm videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel crct10dif_pclmul media cfg80211 snd_hda_controller iTCO_wdt mxm_wmi i2c_algo_bit drm_kms_helper drm crc32_pclmul crc32c_intel ghash_clmulni_intel snd_hda_codec snd_hwdep iTCO_vendor_support btusb bluetooth snd_seq snd_seq_device snd_pcm snd_timer snd soundcore mei_me mei joydev i2c_i801 serio_raw microcode rfkill i2c_core lpc_ich mfd_core shpchp
> [63276.841619]  wmi video r8169 mii
> [63276.841624] CPU: 1 PID: 1495 Comm: pulseaudio Tainted: G        W     3.16.0-rc6+ #23
> [63276.841626] Hardware name: SAMSUNG ELECTRONICS CO., LTD. 550P5C/550P7C/SAMSUNG_NP1234567890, BIOS P05ABI.016.130917.dg 09/17/2013
> [63276.841627]  0000000000000000 0000000036bcbe1b ffff8800c1a13838 ffffffff816f523f
> [63276.841631]  ffff8800c1a13880 ffff8800c1a13870 ffffffff8108be8d ffff880219ca4c20
> [63276.841634]  00000000ffffffef ffff88021a364040 ffff880219ca4c10 ffff88021a763c58
> [63276.841638] Call Trace:
> [63276.841642]  [<ffffffff816f523f>] dump_stack+0x45/0x56
> [63276.841646]  [<ffffffff8108be8d>] warn_slowpath_common+0x7d/0xa0
> [63276.841649]  [<ffffffff8108bf0c>] warn_slowpath_fmt+0x5c/0x80
> [63276.841654]  [<ffffffff81358544>] kobject_add_internal+0x284/0x3f0
> [63276.841658]  [<ffffffff81358b75>] kobject_add+0x75/0xd0
> [63276.841661]  [<ffffffff81462ae3>] ? device_private_init+0x23/0x80
> [63276.841665]  [<ffffffff81462c65>] device_add+0x125/0x630
> [63276.841679]  [<ffffffff8146318a>] device_register+0x1a/0x20
> [63276.841684]  [<ffffffff814f2fa1>] usb_create_ep_devs+0x81/0xd0
> [63276.841688]  [<ffffffff814ec2c5>] ? usb_enable_endpoint+0x85/0x90
> [63276.841692]  [<ffffffff814eb69d>] create_intf_ep_devs+0x5d/0x80
> [63276.841707]  [<ffffffff814ec585>] usb_set_interface+0x255/0x380
> [63276.841712]  [<ffffffffa061c0a8>] snd_em28xx_capture_open+0x218/0x2d0 [em28xx_alsa]
> [63276.841732]  [<ffffffffa012e835>] snd_pcm_open_substream+0x85/0x140 [snd_pcm]
> [63276.841741]  [<ffffffffa012e9b2>] snd_pcm_open+0xc2/0x270 [snd_pcm]
> [63276.841746]  [<ffffffff811d117c>] ? kmem_cache_alloc_trace+0x3c/0x200
> [63276.841755]  [<ffffffffa0100d7a>] ? snd_card_file_add+0x2a/0xd0 [snd]
> [63276.841761]  [<ffffffff810bf570>] ? wake_up_state+0x20/0x20
> [63276.841770]  [<ffffffffa012eba3>] snd_pcm_capture_open+0x43/0x70 [snd_pcm]
> [63276.841779]  [<ffffffffa0100594>] snd_open+0xb4/0x190 [snd]
> [63276.841787]  [<ffffffff811f1e79>] chrdev_open+0xb9/0x1a0
> [63276.841791]  [<ffffffff811ea7bf>] do_dentry_open+0x1ff/0x340
> [63276.841796]  [<ffffffff811f1dc0>] ? cdev_put+0x30/0x30
> [63276.841800]  [<ffffffff811eaad1>] finish_open+0x31/0x40
> [63276.841804]  [<ffffffff811fca24>] do_last+0xa64/0x1190
> [63276.841808]  [<ffffffff811f8d01>] ? link_path_walk+0x81/0x880
> [63276.841813]  [<ffffffff811d1316>] ? kmem_cache_alloc_trace+0x1d6/0x200
> [63276.841818]  [<ffffffff812edecc>] ? selinux_file_alloc_security+0x3c/0x60
> [63276.841823]  [<ffffffff811fd21d>] path_openat+0xcd/0x670
> [63276.841827]  [<ffffffff811f8779>] ? putname+0x29/0x40
> [63276.841831]  [<ffffffff811fdf02>] ? user_path_at_empty+0x72/0xc0
> [63276.841836]  [<ffffffff811fe01d>] do_filp_open+0x4d/0xb0
> [63276.841841]  [<ffffffff8120a9fd>] ? __alloc_fd+0x7d/0x120
> [63276.841846]  [<ffffffff811ec557>] do_sys_open+0x137/0x240
> [63276.841850]  [<ffffffff811ec67e>] SyS_open+0x1e/0x20
> [63276.841855]  [<ffffffff816fc869>] system_call_fastpath+0x16/0x1b
> [63276.841857] ---[ end trace 9381964a5237f705 ]---
> [63276.841867] ------------[ cut here ]------------
> [63276.841872] WARNING: CPU: 1 PID: 1495 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x64/0x80()
> [63276.841874] sysfs: cannot create duplicate filename '/devices/pci0000:00/0000:00:14.0/usb3/3-2/3-2:1.0/ep_82'
> [63276.841875] Modules linked in: rc_hauppauge em28xx_rc rc_core lgdt330x em28xx_dvb dvb_core em28xx_alsa tuner_xc2028 tuner tvp5150 em28xx_v4l em28xx tveeprom fuse ip6table_filter ip6_tables bnep binfmt_misc vfat fat nouveau x86_pkg_temp_thermal coretemp kvm_intel kvm arc4 iwldvm mac80211 i915 uvcvideo iwlwifi ttm videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel crct10dif_pclmul media cfg80211 snd_hda_controller iTCO_wdt mxm_wmi i2c_algo_bit drm_kms_helper drm crc32_pclmul crc32c_intel ghash_clmulni_intel snd_hda_codec snd_hwdep iTCO_vendor_support btusb bluetooth snd_seq snd_seq_device snd_pcm snd_timer snd soundcore mei_me mei joydev i2c_i801 serio_raw microcode rfkill i2c_core lpc_ich mfd_core shpchp
> [63276.841930]  wmi video r8169 mii
> [63276.841935] CPU: 1 PID: 1495 Comm: pulseaudio Tainted: G        W     3.16.0-rc6+ #23
> [63276.841937] Hardware name: SAMSUNG ELECTRONICS CO., LTD. 550P5C/550P7C/SAMSUNG_NP1234567890, BIOS P05ABI.016.130917.dg 09/17/2013
> [63276.841939]  0000000000000000 0000000036bcbe1b ffff8800c1a137e8 ffffffff816f523f
> [63276.841943]  ffff8800c1a13830 ffff8800c1a13820 ffffffff8108be8d ffff8800c7896000
> [63276.841947]  ffff8800c7e07ea0 ffff8802217877f8 ffff880219ca4c10 ffff88021a763c58
> [63276.841951] Call Trace:
> [63276.841957]  [<ffffffff816f523f>] dump_stack+0x45/0x56
> [63276.841961]  [<ffffffff8108be8d>] warn_slowpath_common+0x7d/0xa0
> [63276.841965]  [<ffffffff8108bf0c>] warn_slowpath_fmt+0x5c/0x80
> [63276.841970]  [<ffffffff81262b98>] ? kernfs_path+0x48/0x60
> [63276.841973]  [<ffffffff812662a4>] sysfs_warn_dup+0x64/0x80
> [63276.841977]  [<ffffffff8126634e>] sysfs_create_dir_ns+0x8e/0xa0
> [63276.841983]  [<ffffffff8135837f>] kobject_add_internal+0xbf/0x3f0
> [63276.842028]  [<ffffffff81358b75>] kobject_add+0x75/0xd0
> [63276.842045]  [<ffffffff81462ae3>] ? device_private_init+0x23/0x80
> [63276.842081]  [<ffffffff81462c65>] device_add+0x125/0x630
> [63276.842101]  [<ffffffff8146318a>] device_register+0x1a/0x20
> [63276.842123]  [<ffffffff814f2fa1>] usb_create_ep_devs+0x81/0xd0
> [63276.842145]  [<ffffffff814eb69d>] create_intf_ep_devs+0x5d/0x80
> [63276.842166]  [<ffffffff814ec585>] usb_set_interface+0x255/0x380
> [63276.842201]  [<ffffffffa061c0a8>] snd_em28xx_capture_open+0x218/0x2d0 [em28xx_alsa]
> [63276.842225]  [<ffffffffa012e835>] snd_pcm_open_substream+0x85/0x140 [snd_pcm]
> [63276.842249]  [<ffffffffa012e9b2>] snd_pcm_open+0xc2/0x270 [snd_pcm]
> [63276.842267]  [<ffffffff811d117c>] ? kmem_cache_alloc_trace+0x3c/0x200
> [63276.842278]  [<ffffffffa0100d7a>] ? snd_card_file_add+0x2a/0xd0 [snd]
> [63276.842288]  [<ffffffff810bf570>] ? wake_up_state+0x20/0x20
> [63276.842300]  [<ffffffffa012eba3>] snd_pcm_capture_open+0x43/0x70 [snd_pcm]
> [63276.842311]  [<ffffffffa0100594>] snd_open+0xb4/0x190 [snd]
> [63276.842321]  [<ffffffff811f1e79>] chrdev_open+0xb9/0x1a0
> [63276.842327]  [<ffffffff811ea7bf>] do_dentry_open+0x1ff/0x340
> [63276.842333]  [<ffffffff811f1dc0>] ? cdev_put+0x30/0x30
> [63276.842338]  [<ffffffff811eaad1>] finish_open+0x31/0x40
> [63276.842343]  [<ffffffff811fca24>] do_last+0xa64/0x1190
> [63276.842349]  [<ffffffff811f8d01>] ? link_path_walk+0x81/0x880
> [63276.842355]  [<ffffffff811d1316>] ? kmem_cache_alloc_trace+0x1d6/0x200
> [63276.842361]  [<ffffffff812edecc>] ? selinux_file_alloc_security+0x3c/0x60
> [63276.842367]  [<ffffffff811fd21d>] path_openat+0xcd/0x670
> [63276.842373]  [<ffffffff811f8779>] ? putname+0x29/0x40
> [63276.842378]  [<ffffffff811fdf02>] ? user_path_at_empty+0x72/0xc0
> [63276.842384]  [<ffffffff811fe01d>] do_filp_open+0x4d/0xb0
> [63276.842391]  [<ffffffff8120a9fd>] ? __alloc_fd+0x7d/0x120
> [63276.842396]  [<ffffffff811ec557>] do_sys_open+0x137/0x240
> [63276.842402]  [<ffffffff811ec67e>] SyS_open+0x1e/0x20
> [63276.842408]  [<ffffffff816fc869>] system_call_fastpath+0x16/0x1b
> [63276.842412] ---[ end trace 9381964a5237f706 ]---
> [63276.842415] ------------[ cut here ]------------
> [63276.842422] WARNING: CPU: 1 PID: 1495 at lib/kobject.c:240 kobject_add_internal+0x284/0x3f0()
> [63276.842425] kobject_add_internal failed for ep_82 with -EEXIST, don't try to register things with the same name in the same directory.
> [63276.842428] Modules linked in: rc_hauppauge em28xx_rc rc_core lgdt330x em28xx_dvb dvb_core em28xx_alsa tuner_xc2028 tuner tvp5150 em28xx_v4l em28xx tveeprom fuse ip6table_filter ip6_tables bnep binfmt_misc vfat fat nouveau x86_pkg_temp_thermal coretemp kvm_intel kvm arc4 iwldvm mac80211 i915 uvcvideo iwlwifi ttm videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel crct10dif_pclmul media cfg80211 snd_hda_controller iTCO_wdt mxm_wmi i2c_algo_bit drm_kms_helper drm crc32_pclmul crc32c_intel ghash_clmulni_intel snd_hda_codec snd_hwdep iTCO_vendor_support btusb bluetooth snd_seq snd_seq_device snd_pcm snd_timer snd soundcore mei_me mei joydev i2c_i801 serio_raw microcode rfkill i2c_core lpc_ich mfd_core shpchp
> [63276.842499]  wmi video r8169 mii
> [63276.842506] CPU: 1 PID: 1495 Comm: pulseaudio Tainted: G        W     3.16.0-rc6+ #23
> [63276.842509] Hardware name: SAMSUNG ELECTRONICS CO., LTD. 550P5C/550P7C/SAMSUNG_NP1234567890, BIOS P05ABI.016.130917.dg 09/17/2013
> [63276.842512]  0000000000000000 0000000036bcbe1b ffff8800c1a13838 ffffffff816f523f
> [63276.842516]  ffff8800c1a13880 ffff8800c1a13870 ffffffff8108be8d ffff880219ca4c20
> [63276.842521]  00000000ffffffef ffff88021a364040 ffff880219ca4c10 ffff88021a763c58
> [63276.842528] Call Trace:
> [63276.842535]  [<ffffffff816f523f>] dump_stack+0x45/0x56
> [63276.842541]  [<ffffffff8108be8d>] warn_slowpath_common+0x7d/0xa0
> [63276.842546]  [<ffffffff8108bf0c>] warn_slowpath_fmt+0x5c/0x80
> [63276.842564]  [<ffffffff81358544>] kobject_add_internal+0x284/0x3f0
> [63276.842585]  [<ffffffff81358b75>] kobject_add+0x75/0xd0
> [63276.842603]  [<ffffffff81462ae3>] ? device_private_init+0x23/0x80
> [63276.842622]  [<ffffffff81462c65>] device_add+0x125/0x630
> [63276.842638]  [<ffffffff8146318a>] device_register+0x1a/0x20
> [63276.842658]  [<ffffffff814f2fa1>] usb_create_ep_devs+0x81/0xd0
> [63276.842677]  [<ffffffff814eb69d>] create_intf_ep_devs+0x5d/0x80
> [63276.842694]  [<ffffffff814ec585>] usb_set_interface+0x255/0x380
> [63276.842715]  [<ffffffffa061c0a8>] snd_em28xx_capture_open+0x218/0x2d0 [em28xx_alsa]
> [63276.842734]  [<ffffffffa012e835>] snd_pcm_open_substream+0x85/0x140 [snd_pcm]
> [63276.842747]  [<ffffffffa012e9b2>] snd_pcm_open+0xc2/0x270 [snd_pcm]
> [63276.842754]  [<ffffffff811d117c>] ? kmem_cache_alloc_trace+0x3c/0x200
> [63276.842764]  [<ffffffffa0100d7a>] ? snd_card_file_add+0x2a/0xd0 [snd]
> [63276.842771]  [<ffffffff810bf570>] ? wake_up_state+0x20/0x20
> [63276.842784]  [<ffffffffa012eba3>] snd_pcm_capture_open+0x43/0x70 [snd_pcm]
> [63276.842795]  [<ffffffffa0100594>] snd_open+0xb4/0x190 [snd]
> [63276.842804]  [<ffffffff811f1e79>] chrdev_open+0xb9/0x1a0
> [63276.842809]  [<ffffffff811ea7bf>] do_dentry_open+0x1ff/0x340
> [63276.842815]  [<ffffffff811f1dc0>] ? cdev_put+0x30/0x30
> [63276.842820]  [<ffffffff811eaad1>] finish_open+0x31/0x40
> [63276.842826]  [<ffffffff811fca24>] do_last+0xa64/0x1190
> [63276.842831]  [<ffffffff811f8d01>] ? link_path_walk+0x81/0x880
> [63276.842839]  [<ffffffff811d1316>] ? kmem_cache_alloc_trace+0x1d6/0x200
> [63276.842845]  [<ffffffff812edecc>] ? selinux_file_alloc_security+0x3c/0x60
> [63276.842852]  [<ffffffff811fd21d>] path_openat+0xcd/0x670
> [63276.842857]  [<ffffffff811f8779>] ? putname+0x29/0x40
> [63276.842863]  [<ffffffff811fdf02>] ? user_path_at_empty+0x72/0xc0
> [63276.842868]  [<ffffffff811fe01d>] do_filp_open+0x4d/0xb0
> [63276.842877]  [<ffffffff8120a9fd>] ? __alloc_fd+0x7d/0x120
> [63276.842882]  [<ffffffff811ec557>] do_sys_open+0x137/0x240
> [63276.842887]  [<ffffffff811ec67e>] SyS_open+0x1e/0x20
> [63276.842893]  [<ffffffff816fc869>] system_call_fastpath+0x16/0x1b
> [63276.842897] ---[ end trace 9381964a5237f707 ]---
> [63276.842909] ------------[ cut here ]------------
> [63276.842914] WARNING: CPU: 1 PID: 1495 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x64/0x80()
> [63276.842918] sysfs: cannot create duplicate filename '/devices/pci0000:00/0000:00:14.0/usb3/3-2/3-2:1.0/ep_83'
> [63276.842920] Modules linked in: rc_hauppauge em28xx_rc rc_core lgdt330x em28xx_dvb dvb_core em28xx_alsa tuner_xc2028 tuner tvp5150 em28xx_v4l em28xx tveeprom fuse ip6table_filter ip6_tables bnep binfmt_misc vfat fat nouveau x86_pkg_temp_thermal coretemp kvm_intel kvm arc4 iwldvm mac80211 i915 uvcvideo iwlwifi ttm videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel crct10dif_pclmul media cfg80211 snd_hda_controller iTCO_wdt mxm_wmi i2c_algo_bit drm_kms_helper drm crc32_pclmul crc32c_intel ghash_clmulni_intel snd_hda_codec snd_hwdep iTCO_vendor_support btusb bluetooth snd_seq snd_seq_device snd_pcm snd_timer snd soundcore mei_me mei joydev i2c_i801 serio_raw microcode rfkill i2c_core lpc_ich mfd_core shpchp
> [63276.843045]  wmi video r8169 mii
> [63276.843052] CPU: 1 PID: 1495 Comm: pulseaudio Tainted: G        W     3.16.0-rc6+ #23
> [63276.843056] Hardware name: SAMSUNG ELECTRONICS CO., LTD. 550P5C/550P7C/SAMSUNG_NP1234567890, BIOS P05ABI.016.130917.dg 09/17/2013
> [63276.843059]  0000000000000000 0000000036bcbe1b ffff8800c1a137e8 ffffffff816f523f
> [63276.843065]  ffff8800c1a13830 ffff8800c1a13820 ffffffff8108be8d ffff8800c7896000
> [63276.843070]  ffff8800c7e07ea0 ffff8802217877f8 ffff880219ca4c10 ffff88021a763c58
> [63276.843086] Call Trace:
> [63276.843098]  [<ffffffff816f523f>] dump_stack+0x45/0x56
> [63276.843104]  [<ffffffff8108be8d>] warn_slowpath_common+0x7d/0xa0
> [63276.843109]  [<ffffffff8108bf0c>] warn_slowpath_fmt+0x5c/0x80
> [63276.843115]  [<ffffffff81262b98>] ? kernfs_path+0x48/0x60
> [63276.843122]  [<ffffffff812662a4>] sysfs_warn_dup+0x64/0x80
> [63276.843134]  [<ffffffff8126634e>] sysfs_create_dir_ns+0x8e/0xa0
> [63276.843141]  [<ffffffff8135837f>] kobject_add_internal+0xbf/0x3f0
> [63276.843147]  [<ffffffff81358b75>] kobject_add+0x75/0xd0
> [63276.843157]  [<ffffffff81462ae3>] ? device_private_init+0x23/0x80
> [63276.843163]  [<ffffffff81462c65>] device_add+0x125/0x630
> [63276.843171]  [<ffffffff8146318a>] device_register+0x1a/0x20
> [63276.843182]  [<ffffffff814f2fa1>] usb_create_ep_devs+0x81/0xd0
> [63276.843188]  [<ffffffff814eb69d>] create_intf_ep_devs+0x5d/0x80
> [63276.843193]  [<ffffffff814ec585>] usb_set_interface+0x255/0x380
> [63276.843204]  [<ffffffffa061c0a8>] snd_em28xx_capture_open+0x218/0x2d0 [em28xx_alsa]
> [63276.843217]  [<ffffffffa012e835>] snd_pcm_open_substream+0x85/0x140 [snd_pcm]
> [63276.843232]  [<ffffffffa012e9b2>] snd_pcm_open+0xc2/0x270 [snd_pcm]
> [63276.843238]  [<ffffffff811d117c>] ? kmem_cache_alloc_trace+0x3c/0x200
> [63276.843247]  [<ffffffffa0100d7a>] ? snd_card_file_add+0x2a/0xd0 [snd]
> [63276.843254]  [<ffffffff810bf570>] ? wake_up_state+0x20/0x20
> [63276.843262]  [<ffffffffa012eba3>] snd_pcm_capture_open+0x43/0x70 [snd_pcm]
> [63276.843270]  [<ffffffffa0100594>] snd_open+0xb4/0x190 [snd]
> [63276.843277]  [<ffffffff811f1e79>] chrdev_open+0xb9/0x1a0
> [63276.843280]  [<ffffffff811ea7bf>] do_dentry_open+0x1ff/0x340
> [63276.843284]  [<ffffffff811f1dc0>] ? cdev_put+0x30/0x30
> [63276.843287]  [<ffffffff811eaad1>] finish_open+0x31/0x40
> [63276.843293]  [<ffffffff811fca24>] do_last+0xa64/0x1190
> [63276.843296]  [<ffffffff811f8d01>] ? link_path_walk+0x81/0x880
> [63276.843300]  [<ffffffff811d1316>] ? kmem_cache_alloc_trace+0x1d6/0x200
> [63276.843305]  [<ffffffff812edecc>] ? selinux_file_alloc_security+0x3c/0x60
> [63276.843309]  [<ffffffff811fd21d>] path_openat+0xcd/0x670
> [63276.843312]  [<ffffffff811f8779>] ? putname+0x29/0x40
> [63276.843316]  [<ffffffff811fdf02>] ? user_path_at_empty+0x72/0xc0
> [63276.843320]  [<ffffffff811fe01d>] do_filp_open+0x4d/0xb0
> [63276.843325]  [<ffffffff8120a9fd>] ? __alloc_fd+0x7d/0x120
> [63276.843330]  [<ffffffff811ec557>] do_sys_open+0x137/0x240
> [63276.843334]  [<ffffffff811ec67e>] SyS_open+0x1e/0x20
> [63276.843338]  [<ffffffff816fc869>] system_call_fastpath+0x16/0x1b
> [63276.843340] ---[ end trace 9381964a5237f708 ]---
> [63276.843342] ------------[ cut here ]------------
> [63276.843347] WARNING: CPU: 1 PID: 1495 at lib/kobject.c:240 kobject_add_internal+0x284/0x3f0()
> [63276.843349] kobject_add_internal failed for ep_83 with -EEXIST, don't try to register things with the same name in the same directory.
> [63276.843350] Modules linked in: rc_hauppauge em28xx_rc rc_core lgdt330x em28xx_dvb dvb_core em28xx_alsa tuner_xc2028 tuner tvp5150 em28xx_v4l em28xx tveeprom fuse ip6table_filter ip6_tables bnep binfmt_misc vfat fat nouveau x86_pkg_temp_thermal coretemp kvm_intel kvm arc4 iwldvm mac80211 i915 uvcvideo iwlwifi ttm videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel crct10dif_pclmul media cfg80211 snd_hda_controller iTCO_wdt mxm_wmi i2c_algo_bit drm_kms_helper drm crc32_pclmul crc32c_intel ghash_clmulni_intel snd_hda_codec snd_hwdep iTCO_vendor_support btusb bluetooth snd_seq snd_seq_device snd_pcm snd_timer snd soundcore mei_me mei joydev i2c_i801 serio_raw microcode rfkill i2c_core lpc_ich mfd_core shpchp
> [63276.843401]  wmi video r8169 mii
> [63276.843405] CPU: 1 PID: 1495 Comm: pulseaudio Tainted: G        W     3.16.0-rc6+ #23
> [63276.843407] Hardware name: SAMSUNG ELECTRONICS CO., LTD. 550P5C/550P7C/SAMSUNG_NP1234567890, BIOS P05ABI.016.130917.dg 09/17/2013
> [63276.843409]  0000000000000000 0000000036bcbe1b ffff8800c1a13838 ffffffff816f523f
> [63276.843412]  ffff8800c1a13880 ffff8800c1a13870 ffffffff8108be8d ffff880219ca4c20
> [63276.843416]  00000000ffffffef ffff88021a364040 ffff880219ca4c10 ffff88021a763c58
> [63276.843419] Call Trace:
> [63276.843424]  [<ffffffff816f523f>] dump_stack+0x45/0x56
> [63276.843427]  [<ffffffff8108be8d>] warn_slowpath_common+0x7d/0xa0
> [63276.843431]  [<ffffffff8108bf0c>] warn_slowpath_fmt+0x5c/0x80
> [63276.843435]  [<ffffffff81358544>] kobject_add_internal+0x284/0x3f0
> [63276.843441]  [<ffffffff81358b75>] kobject_add+0x75/0xd0
> [63276.843444]  [<ffffffff81462ae3>] ? device_private_init+0x23/0x80
> [63276.843448]  [<ffffffff81462c65>] device_add+0x125/0x630
> [63276.843451]  [<ffffffff8146318a>] device_register+0x1a/0x20
> [63276.843456]  [<ffffffff814f2fa1>] usb_create_ep_devs+0x81/0xd0
> [63276.843459]  [<ffffffff814eb69d>] create_intf_ep_devs+0x5d/0x80
> [63276.843463]  [<ffffffff814ec585>] usb_set_interface+0x255/0x380
> [63276.843467]  [<ffffffffa061c0a8>] snd_em28xx_capture_open+0x218/0x2d0 [em28xx_alsa]
> [63276.843475]  [<ffffffffa012e835>] snd_pcm_open_substream+0x85/0x140 [snd_pcm]
> [63276.843483]  [<ffffffffa012e9b2>] snd_pcm_open+0xc2/0x270 [snd_pcm]
> [63276.843487]  [<ffffffff811d117c>] ? kmem_cache_alloc_trace+0x3c/0x200
> [63276.843496]  [<ffffffffa0100d7a>] ? snd_card_file_add+0x2a/0xd0 [snd]
> [63276.843501]  [<ffffffff810bf570>] ? wake_up_state+0x20/0x20
> [63276.843508]  [<ffffffffa012eba3>] snd_pcm_capture_open+0x43/0x70 [snd_pcm]
> [63276.843516]  [<ffffffffa0100594>] snd_open+0xb4/0x190 [snd]
> [63276.843523]  [<ffffffff811f1e79>] chrdev_open+0xb9/0x1a0
> [63276.843526]  [<ffffffff811ea7bf>] do_dentry_open+0x1ff/0x340
> [63276.843530]  [<ffffffff811f1dc0>] ? cdev_put+0x30/0x30
> [63276.843535]  [<ffffffff811eaad1>] finish_open+0x31/0x40
> [63276.843538]  [<ffffffff811fca24>] do_last+0xa64/0x1190
> [63276.843542]  [<ffffffff811f8d01>] ? link_path_walk+0x81/0x880
> [63276.843546]  [<ffffffff811d1316>] ? kmem_cache_alloc_trace+0x1d6/0x200
> [63276.843550]  [<ffffffff812edecc>] ? selinux_file_alloc_security+0x3c/0x60
> [63276.843554]  [<ffffffff811fd21d>] path_openat+0xcd/0x670
> [63276.843558]  [<ffffffff811f8779>] ? putname+0x29/0x40
> [63276.843562]  [<ffffffff811fdf02>] ? user_path_at_empty+0x72/0xc0
> [63276.843566]  [<ffffffff811fe01d>] do_filp_open+0x4d/0xb0
> [63276.843570]  [<ffffffff8120a9fd>] ? __alloc_fd+0x7d/0x120
> [63276.843575]  [<ffffffff811ec557>] do_sys_open+0x137/0x240
> [63276.843579]  [<ffffffff811ec67e>] SyS_open+0x1e/0x20
> [63276.843583]  [<ffffffff816fc869>] system_call_fastpath+0x16/0x1b
> [63276.843585] ---[ end trace 9381964a5237f709 ]---
> [63276.843593] ------------[ cut here ]------------
> [63276.843596] WARNING: CPU: 1 PID: 1495 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x64/0x80()
> [63276.843598] sysfs: cannot create duplicate filename '/devices/pci0000:00/0000:00:14.0/usb3/3-2/3-2:1.0/ep_84'
> [63276.843600] Modules linked in: rc_hauppauge em28xx_rc rc_core lgdt330x em28xx_dvb dvb_core em28xx_alsa tuner_xc2028 tuner tvp5150 em28xx_v4l em28xx tveeprom fuse ip6table_filter ip6_tables bnep binfmt_misc vfat fat nouveau x86_pkg_temp_thermal coretemp kvm_intel kvm arc4 iwldvm mac80211 i915 uvcvideo iwlwifi ttm videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel crct10dif_pclmul media cfg80211 snd_hda_controller iTCO_wdt mxm_wmi i2c_algo_bit drm_kms_helper drm crc32_pclmul crc32c_intel ghash_clmulni_intel snd_hda_codec snd_hwdep iTCO_vendor_support btusb bluetooth snd_seq snd_seq_device snd_pcm snd_timer snd soundcore mei_me mei joydev i2c_i801 serio_raw microcode rfkill i2c_core lpc_ich mfd_core shpchp
> [63276.843650]  wmi video r8169 mii
> [63276.843654] CPU: 1 PID: 1495 Comm: pulseaudio Tainted: G        W     3.16.0-rc6+ #23
> [63276.843656] Hardware name: SAMSUNG ELECTRONICS CO., LTD. 550P5C/550P7C/SAMSUNG_NP1234567890, BIOS P05ABI.016.130917.dg 09/17/2013
> [63276.843657]  0000000000000000 0000000036bcbe1b ffff8800c1a137e8 ffffffff816f523f
> [63276.843661]  ffff8800c1a13830 ffff8800c1a13820 ffffffff8108be8d ffff8800c7896000
> [63276.843664]  ffff8800c7e07ea0 ffff8802217877f8 ffff880219ca4c10 ffff88021a763c58
> [63276.843668] Call Trace:
> [63276.843672]  [<ffffffff816f523f>] dump_stack+0x45/0x56
> [63276.843675]  [<ffffffff8108be8d>] warn_slowpath_common+0x7d/0xa0
> [63276.843679]  [<ffffffff8108bf0c>] warn_slowpath_fmt+0x5c/0x80
> [63276.843683]  [<ffffffff81262b98>] ? kernfs_path+0x48/0x60
> [63276.843688]  [<ffffffff812662a4>] sysfs_warn_dup+0x64/0x80
> [63276.843691]  [<ffffffff8126634e>] sysfs_create_dir_ns+0x8e/0xa0
> [63276.843695]  [<ffffffff8135837f>] kobject_add_internal+0xbf/0x3f0
> [63276.843699]  [<ffffffff81358b75>] kobject_add+0x75/0xd0
> [63276.843703]  [<ffffffff81462ae3>] ? device_private_init+0x23/0x80
> [63276.843706]  [<ffffffff81462c65>] device_add+0x125/0x630
> [63276.843709]  [<ffffffff8146318a>] device_register+0x1a/0x20
> [63276.843714]  [<ffffffff814f2fa1>] usb_create_ep_devs+0x81/0xd0
> [63276.843717]  [<ffffffff814eb69d>] create_intf_ep_devs+0x5d/0x80
> [63276.843721]  [<ffffffff814ec585>] usb_set_interface+0x255/0x380
> [63276.843727]  [<ffffffffa061c0a8>] snd_em28xx_capture_open+0x218/0x2d0 [em28xx_alsa]
> [63276.843734]  [<ffffffffa012e835>] snd_pcm_open_substream+0x85/0x140 [snd_pcm]
> [63276.843742]  [<ffffffffa012e9b2>] snd_pcm_open+0xc2/0x270 [snd_pcm]
> [63276.843746]  [<ffffffff811d117c>] ? kmem_cache_alloc_trace+0x3c/0x200
> [63276.843753]  [<ffffffffa0100d7a>] ? snd_card_file_add+0x2a/0xd0 [snd]
> [63276.843758]  [<ffffffff810bf570>] ? wake_up_state+0x20/0x20
> [63276.843767]  [<ffffffffa012eba3>] snd_pcm_capture_open+0x43/0x70 [snd_pcm]
> [63276.843775]  [<ffffffffa0100594>] snd_open+0xb4/0x190 [snd]
> [63276.843781]  [<ffffffff811f1e79>] chrdev_open+0xb9/0x1a0
> [63276.843784]  [<ffffffff811ea7bf>] do_dentry_open+0x1ff/0x340
> [63276.843788]  [<ffffffff811f1dc0>] ? cdev_put+0x30/0x30
> [63276.843792]  [<ffffffff811eaad1>] finish_open+0x31/0x40
> [63276.843795]  [<ffffffff811fca24>] do_last+0xa64/0x1190
> [63276.843800]  [<ffffffff811f8d01>] ? link_path_walk+0x81/0x880
> [63276.843804]  [<ffffffff811d1316>] ? kmem_cache_alloc_trace+0x1d6/0x200
> [63276.843809]  [<ffffffff812edecc>] ? selinux_file_alloc_security+0x3c/0x60
> [63276.843813]  [<ffffffff811fd21d>] path_openat+0xcd/0x670
> [63276.843816]  [<ffffffff811f8779>] ? putname+0x29/0x40
> [63276.843820]  [<ffffffff811fdf02>] ? user_path_at_empty+0x72/0xc0
> [63276.843824]  [<ffffffff811fe01d>] do_filp_open+0x4d/0xb0
> [63276.843829]  [<ffffffff8120a9fd>] ? __alloc_fd+0x7d/0x120
> [63276.843832]  [<ffffffff811ec557>] do_sys_open+0x137/0x240
> [63276.843836]  [<ffffffff811ec67e>] SyS_open+0x1e/0x20
> [63276.843841]  [<ffffffff816fc869>] system_call_fastpath+0x16/0x1b
> [63276.843843] ---[ end trace 9381964a5237f70a ]---
> [63276.843845] ------------[ cut here ]------------
> [63276.843849] WARNING: CPU: 1 PID: 1495 at lib/kobject.c:240 kobject_add_internal+0x284/0x3f0()
> [63276.843851] kobject_add_internal failed for ep_84 with -EEXIST, don't try to register things with the same name in the same directory.
> [63276.843852] Modules linked in: rc_hauppauge em28xx_rc rc_core lgdt330x em28xx_dvb dvb_core em28xx_alsa tuner_xc2028 tuner tvp5150 em28xx_v4l em28xx tveeprom fuse ip6table_filter ip6_tables bnep binfmt_misc vfat fat nouveau x86_pkg_temp_thermal coretemp kvm_intel kvm arc4 iwldvm mac80211 i915 uvcvideo iwlwifi ttm videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel crct10dif_pclmul media cfg80211 snd_hda_controller iTCO_wdt mxm_wmi i2c_algo_bit drm_kms_helper drm crc32_pclmul crc32c_intel ghash_clmulni_intel snd_hda_codec snd_hwdep iTCO_vendor_support btusb bluetooth snd_seq snd_seq_device snd_pcm snd_timer snd soundcore mei_me mei joydev i2c_i801 serio_raw microcode rfkill i2c_core lpc_ich mfd_core shpchp
> [63276.843901]  wmi video r8169 mii
> [63276.843905] CPU: 1 PID: 1495 Comm: pulseaudio Tainted: G        W     3.16.0-rc6+ #23
> [63276.843907] Hardware name: SAMSUNG ELECTRONICS CO., LTD. 550P5C/550P7C/SAMSUNG_NP1234567890, BIOS P05ABI.016.130917.dg 09/17/2013
> [63276.843908]  0000000000000000 0000000036bcbe1b ffff8800c1a13838 ffffffff816f523f
> [63276.843913]  ffff8800c1a13880 ffff8800c1a13870 ffffffff8108be8d ffff880219ca4c20
> [63276.843917]  00000000ffffffef ffff88021a364040 ffff880219ca4c10 ffff88021a763c58
> [63276.843920] Call Trace:
> [63276.843924]  [<ffffffff816f523f>] dump_stack+0x45/0x56
> [63276.843928]  [<ffffffff8108be8d>] warn_slowpath_common+0x7d/0xa0
> [63276.843931]  [<ffffffff8108bf0c>] warn_slowpath_fmt+0x5c/0x80
> [63276.843936]  [<ffffffff81358544>] kobject_add_internal+0x284/0x3f0
> [63276.843940]  [<ffffffff81358b75>] kobject_add+0x75/0xd0
> [63276.843943]  [<ffffffff81462ae3>] ? device_private_init+0x23/0x80
> [63276.843948]  [<ffffffff81462c65>] device_add+0x125/0x630
> [63276.843951]  [<ffffffff8146318a>] device_register+0x1a/0x20
> [63276.843956]  [<ffffffff814f2fa1>] usb_create_ep_devs+0x81/0xd0
> [63276.843959]  [<ffffffff814eb69d>] create_intf_ep_devs+0x5d/0x80
> [63276.843962]  [<ffffffff814ec585>] usb_set_interface+0x255/0x380
> [63276.843967]  [<ffffffffa061c0a8>] snd_em28xx_capture_open+0x218/0x2d0 [em28xx_alsa]
> [63276.843974]  [<ffffffffa012e835>] snd_pcm_open_substream+0x85/0x140 [snd_pcm]
> [63276.843983]  [<ffffffffa012e9b2>] snd_pcm_open+0xc2/0x270 [snd_pcm]
> [63276.844011]  [<ffffffff811d117c>] ? kmem_cache_alloc_trace+0x3c/0x200
> [63276.844034]  [<ffffffffa0100d7a>] ? snd_card_file_add+0x2a/0xd0 [snd]
> [63276.844056]  [<ffffffff810bf570>] ? wake_up_state+0x20/0x20
> [63276.844079]  [<ffffffffa012eba3>] snd_pcm_capture_open+0x43/0x70 [snd_pcm]
> [63276.844104]  [<ffffffffa0100594>] snd_open+0xb4/0x190 [snd]
> [63276.844123]  [<ffffffff811f1e79>] chrdev_open+0xb9/0x1a0
> [63276.844143]  [<ffffffff811ea7bf>] do_dentry_open+0x1ff/0x340
> [63276.844161]  [<ffffffff811f1dc0>] ? cdev_put+0x30/0x30
> [63276.844180]  [<ffffffff811eaad1>] finish_open+0x31/0x40
> [63276.844197]  [<ffffffff811fca24>] do_last+0xa64/0x1190
> [63276.844217]  [<ffffffff811f8d01>] ? link_path_walk+0x81/0x880
> [63276.844224]  [<ffffffff811d1316>] ? kmem_cache_alloc_trace+0x1d6/0x200
> [63276.844230]  [<ffffffff812edecc>] ? selinux_file_alloc_security+0x3c/0x60
> [63276.844237]  [<ffffffff811fd21d>] path_openat+0xcd/0x670
> [63276.844242]  [<ffffffff811f8779>] ? putname+0x29/0x40
> [63276.844250]  [<ffffffff811fdf02>] ? user_path_at_empty+0x72/0xc0
> [63276.844256]  [<ffffffff811fe01d>] do_filp_open+0x4d/0xb0
> [63276.844262]  [<ffffffff8120a9fd>] ? __alloc_fd+0x7d/0x120
> [63276.844267]  [<ffffffff811ec557>] do_sys_open+0x137/0x240
> [63276.844273]  [<ffffffff811ec67e>] SyS_open+0x1e/0x20
> [63276.844279]  [<ffffffff816fc869>] system_call_fastpath+0x16/0x1b
> [63276.844283] ---[ end trace 9381964a5237f70b ]---
> [63276.947086] xc2028 19-0061: Loading firmware for type=BASE MTS (5), id 0000000000000000.
> [63277.889918] xc2028 19-0061: Loading firmware for type=MTS (4), id 000000000000b700.
> [63277.904978] xc2028 19-0061: Loading SCODE for type=MTS LCD NOGD MONO IF SCODE HAS_IF_4500 (6002b004), id 000000000000b700.
> [63279.266689] tvp5150 19-005c: i2c i/o error: rc == -6
> [63279.273050] tvp5150 19-005c: i2c i/o error: rc == -6
> [63279.322160] tvp5150 19-005c: i2c i/o error: rc == -6
> [63279.323365] tvp5150 19-005c: i2c i/o error: rc == -6
> [63279.372175] xc2028 19-0061: Loading firmware for type=BASE MTS (5), id 0000000000000000.
> [63280.357379] xc2028 19-0061: Loading firmware for type=MTS (4), id 000000000000b700.
> [63280.374595] xc2028 19-0061: Loading SCODE for type=MTS LCD NOGD MONO IF SCODE HAS_IF_4500 (6002b004), id 000000000000b700.
> [63280.544446] ------------[ cut here ]------------
> [63280.544469] WARNING: CPU: 4 PID: 14819 at drivers/media/v4l2-core/videobuf2-core.c:2126 __vb2_queue_cancel+0x1b1/0x260 [videobuf2_core]()
> [63280.544472] Modules linked in: rc_hauppauge em28xx_rc rc_core lgdt330x em28xx_dvb dvb_core em28xx_alsa tuner_xc2028 tuner tvp5150 em28xx_v4l em28xx tveeprom fuse ip6table_filter ip6_tables bnep binfmt_misc vfat fat nouveau x86_pkg_temp_thermal coretemp kvm_intel kvm arc4 iwldvm mac80211 i915 uvcvideo iwlwifi ttm videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel crct10dif_pclmul media cfg80211 snd_hda_controller iTCO_wdt mxm_wmi i2c_algo_bit drm_kms_helper drm crc32_pclmul crc32c_intel ghash_clmulni_intel snd_hda_codec snd_hwdep iTCO_vendor_support btusb bluetooth snd_seq snd_seq_device snd_pcm snd_timer snd soundcore mei_me mei joydev i2c_i801 serio_raw microcode rfkill i2c_core lpc_ich mfd_core shpchp
> [63280.544534]  wmi video r8169 mii
> [63280.544542] CPU: 4 PID: 14819 Comm: xawtv Tainted: G        W     3.16.0-rc6+ #23
> [63280.544545] Hardware name: SAMSUNG ELECTRONICS CO., LTD. 550P5C/550P7C/SAMSUNG_NP1234567890, BIOS P05ABI.016.130917.dg 09/17/2013
> [63280.544547]  0000000000000000 00000000172d2101 ffff8800c8b9bc08 ffffffff816f523f
> [63280.544552]  0000000000000000 ffff8800c8b9bc40 ffffffff8108be8d 0000000000000000
> [63280.544556]  0000000000000001 ffff8800c5488948 ffff88021a5b4a00 0000000000000000
> [63280.544560] Call Trace:
> [63280.544571]  [<ffffffff816f523f>] dump_stack+0x45/0x56
> [63280.544577]  [<ffffffff8108be8d>] warn_slowpath_common+0x7d/0xa0
> [63280.544581]  [<ffffffff8108bfba>] warn_slowpath_null+0x1a/0x20
> [63280.544589]  [<ffffffffa0319951>] __vb2_queue_cancel+0x1b1/0x260 [videobuf2_core]
> [63280.544597]  [<ffffffffa031a2c5>] vb2_internal_streamoff+0x35/0x90 [videobuf2_core]
> [63280.544603]  [<ffffffffa031a355>] vb2_streamoff+0x35/0x60 [videobuf2_core]
> [63280.544610]  [<ffffffffa031a3c8>] vb2_ioctl_streamoff+0x48/0x50 [videobuf2_core]
> [63280.544619]  [<ffffffffa02f0a8a>] v4l_streamoff+0x1a/0x20 [videodev]
> [63280.544628]  [<ffffffffa02f39c4>] __video_do_ioctl+0x294/0x310 [videodev]
> [63280.544637]  [<ffffffffa02f63be>] video_usercopy+0x22e/0x5b0 [videodev]
> [63280.544645]  [<ffffffffa02f3730>] ? v4l_dbg_s_register+0x150/0x150 [videodev]
> [63280.544654]  [<ffffffffa02f6755>] video_ioctl2+0x15/0x20 [videodev]
> [63280.544662]  [<ffffffffa02ef71b>] v4l2_ioctl+0x11b/0x150 [videodev]
> [63280.544669]  [<ffffffff81200640>] do_vfs_ioctl+0x2e0/0x4a0
> [63280.544674]  [<ffffffff81200881>] SyS_ioctl+0x81/0xa0
> [63280.544681]  [<ffffffff81122656>] ? __audit_syscall_exit+0x1f6/0x2a0
> [63280.544688]  [<ffffffff816fc869>] system_call_fastpath+0x16/0x1b
> [63280.544690] ---[ end trace 9381964a5237f70c ]---
> [63287.078863] tvp5150 19-005c: i2c i/o error: rc == -6
> [63287.136674] tvp5150 19-005c: i2c i/o error: rc == -6
> [63287.263527] ------------[ cut here ]------------
> [63287.263537] WARNING: CPU: 4 PID: 14819 at drivers/media/v4l2-core/videobuf2-core.c:2126 __vb2_queue_cancel+0x1b1/0x260 [videobuf2_core]()
> [63287.263538] Modules linked in: rc_hauppauge em28xx_rc rc_core lgdt330x em28xx_dvb dvb_core em28xx_alsa tuner_xc2028 tuner tvp5150 em28xx_v4l em28xx tveeprom fuse ip6table_filter ip6_tables bnep binfmt_misc vfat fat nouveau x86_pkg_temp_thermal coretemp kvm_intel kvm arc4 iwldvm mac80211 i915 uvcvideo iwlwifi ttm videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel crct10dif_pclmul media cfg80211 snd_hda_controller iTCO_wdt mxm_wmi i2c_algo_bit drm_kms_helper drm crc32_pclmul crc32c_intel ghash_clmulni_intel snd_hda_codec snd_hwdep iTCO_vendor_support btusb bluetooth snd_seq snd_seq_device snd_pcm snd_timer snd soundcore mei_me mei joydev i2c_i801 serio_raw microcode rfkill i2c_core lpc_ich mfd_core shpchp
> [63287.263567]  wmi video r8169 mii
> [63287.263570] CPU: 4 PID: 14819 Comm: xawtv Tainted: G        W     3.16.0-rc6+ #23
> [63287.263572] Hardware name: SAMSUNG ELECTRONICS CO., LTD. 550P5C/550P7C/SAMSUNG_NP1234567890, BIOS P05ABI.016.130917.dg 09/17/2013
> [63287.263573]  0000000000000000 00000000172d2101 ffff8800c8b9bd60 ffffffff816f523f
> [63287.263575]  0000000000000000 ffff8800c8b9bd98 ffffffff8108be8d 0000000000000000
> [63287.263576]  ffff8800c5488da8 ffff8800c5488948 ffff8800c5488800 ffff8800c54887a0
> [63287.263578] Call Trace:
> [63287.263583]  [<ffffffff816f523f>] dump_stack+0x45/0x56
> [63287.263586]  [<ffffffff8108be8d>] warn_slowpath_common+0x7d/0xa0
> [63287.263588]  [<ffffffff8108bfba>] warn_slowpath_null+0x1a/0x20
> [63287.263591]  [<ffffffffa0319951>] __vb2_queue_cancel+0x1b1/0x260 [videobuf2_core]
> [63287.263594]  [<ffffffff814eb69d>] ? create_intf_ep_devs+0x5d/0x80
> [63287.263598]  [<ffffffffa031c62a>] vb2_queue_release+0x1a/0x30 [videobuf2_core]
> [63287.263600]  [<ffffffffa031c6a1>] _vb2_fop_release+0x61/0xa0 [videobuf2_core]
> [63287.263603]  [<ffffffffa031c70a>] vb2_fop_release+0x2a/0x50 [videobuf2_core]
> [63287.263606]  [<ffffffffa0752194>] em28xx_v4l2_close+0xf4/0x1d0 [em28xx_v4l]
> [63287.263610]  [<ffffffffa02ef498>] v4l2_release+0x38/0x80 [videodev]
> [63287.263613]  [<ffffffff811ef11c>] __fput+0xdc/0x1e0
> [63287.263615]  [<ffffffff811ef26e>] ____fput+0xe/0x10
> [63287.263618]  [<ffffffff810ab9df>] task_work_run+0x9f/0xe0
> [63287.263620]  [<ffffffff81013b71>] do_notify_resume+0x61/0xa0
> [63287.263623]  [<ffffffff816fcb22>] int_signal+0x12/0x17
> [63287.263624] ---[ end trace 9381964a5237f70d ]---
> 
> 
>>
>> 	Hans
>>
>>>
>>> Regards,
>>>
>>> 	Hans
>>>
>>> --
>>> To unsubscribe from this list: send the line "unsubscribe linux-media" in
>>> the body of a message to majordomo@vger.kernel.org
>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>
>>
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-media" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> --
> To unsubscribe from this list: send the line "unsubscribe linux-media" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> 


^ permalink raw reply	[flat|nested] 10+ messages in thread

* Re: [PATCH 0/4] vb2/saa7134 regression/documentation fixes
  2014-09-17  9:14 [PATCH 0/4] vb2/saa7134 regression/documentation fixes Hans Verkuil
                   ` (4 preceding siblings ...)
  2014-09-17 16:06 ` [PATCH 0/4] vb2/saa7134 regression/documentation fixes Hans Verkuil
@ 2014-09-18 12:55 ` Mauro Carvalho Chehab
  2014-09-18 13:28   ` Hans Verkuil
  5 siblings, 1 reply; 10+ messages in thread
From: Mauro Carvalho Chehab @ 2014-09-18 12:55 UTC (permalink / raw)
  To: Hans Verkuil; +Cc: linux-media

Em Wed, 17 Sep 2014 11:14:28 +0200
Hans Verkuil <hverkuil@xs4all.nl> escreveu:

> This fixes the VBI regression seen in saa7134 when it was converted
> to vb2. Tested with my saa7134 board.
> 
> It also updates the poll documentation and fixes a saa7134 bug where
> the WSS signal was never captured.
> 
> The first patch should go to 3.17. It won't apply to older kernels,
> so I guess once this is merged we should post a patch to stable for
> those older kernels, certainly 3.16.
> 
> I would expect this to be an issue for em28xx as well, but I will
> need to test that. If that driver is affected as well, then this
> fix needs to go into 3.9 and up.

For now:

Nacked-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>


Changing the V4L2 API is *not* the right way to fix a regression.

Also, this changes a behavior that it is there since 2.6.24.
We can't do that, except if you're sure that no userspace applications
rely on the old behavior, with seems unlikely.

> 
> Regards,
> 
> 	Hans
> 
> --
> To unsubscribe from this list: send the line "unsubscribe linux-media" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

^ permalink raw reply	[flat|nested] 10+ messages in thread

* Re: [PATCH 0/4] vb2/saa7134 regression/documentation fixes
  2014-09-18 12:55 ` Mauro Carvalho Chehab
@ 2014-09-18 13:28   ` Hans Verkuil
  0 siblings, 0 replies; 10+ messages in thread
From: Hans Verkuil @ 2014-09-18 13:28 UTC (permalink / raw)
  To: Mauro Carvalho Chehab; +Cc: linux-media

On 09/18/14 14:55, Mauro Carvalho Chehab wrote:
> Em Wed, 17 Sep 2014 11:14:28 +0200
> Hans Verkuil <hverkuil@xs4all.nl> escreveu:
> 
>> This fixes the VBI regression seen in saa7134 when it was converted
>> to vb2. Tested with my saa7134 board.
>>
>> It also updates the poll documentation and fixes a saa7134 bug where
>> the WSS signal was never captured.
>>
>> The first patch should go to 3.17. It won't apply to older kernels,
>> so I guess once this is merged we should post a patch to stable for
>> those older kernels, certainly 3.16.
>>
>> I would expect this to be an issue for em28xx as well, but I will
>> need to test that. If that driver is affected as well, then this
>> fix needs to go into 3.9 and up.
> 
> For now:
> 
> Nacked-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
> 
> 
> Changing the V4L2 API is *not* the right way to fix a regression.

Then that leaves option 4 as described by Laurent here:

http://www.mail-archive.com/linux-media@vger.kernel.org/msg79465.html

Please reply to his email rather than this one.

Regards,

	Hans

^ permalink raw reply	[flat|nested] 10+ messages in thread

end of thread, other threads:[~2014-09-18 16:26 UTC | newest]

Thread overview: 10+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2014-09-17  9:14 [PATCH 0/4] vb2/saa7134 regression/documentation fixes Hans Verkuil
2014-09-17  9:14 ` [PATCH 1/4] vb2: fix VBI regression Hans Verkuil
2014-09-17  9:14 ` [PATCH 2/4] DocBook media: fix poll specification Hans Verkuil
2014-09-17  9:14 ` [PATCH 3/4] DocBook media: update poll() documentation Hans Verkuil
2014-09-17  9:14 ` [PATCH 4/4] saa7134: also capture the WSS signal for 50 Hz VBI capture Hans Verkuil
2014-09-17 16:06 ` [PATCH 0/4] vb2/saa7134 regression/documentation fixes Hans Verkuil
2014-09-18 16:21   ` Mauro Carvalho Chehab
2014-09-18 16:26     ` Hans Verkuil
2014-09-18 12:55 ` Mauro Carvalho Chehab
2014-09-18 13:28   ` Hans Verkuil

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