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Date:	Fri, 08 Aug 2014 05:42:36 +0200
From:	Udo van den Heuvel <udovdh@...all.nl>
To:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:	linux-media@...r.kernel.org
Subject: 3.15.8 USB issue with uvc cam

Hello,

I get WARNINGs when trying to use a Logitech C615 cam.
See attachment for full dmesg of errors but excerpt below:

[80346.835015] xhci_hcd 0000:02:00.0: ERROR: unexpected command
completion code 0x11.
[80346.835027] usb 6-2: Not enough bandwidth for altsetting 11
[80346.835137] ------------[ cut here ]------------
[80346.835155] WARNING: CPU: 3 PID: 20594 at
drivers/media/v4l2-core/videobuf2-core.c:2011
__vb2_queue_cancel+0x102/0x170 [videobuf2_core]()
[80346.835158] Modules linked in: uvcvideo cdc_acm bnep bluetooth fuse
edac_core cpufreq_userspace ipt_REJECT nf_conntrack_netbios_ns
nf_conntrack_broadcast iptable_filter ip6t_REJECT ipt_MASQUERADE
xt_tcpudp nf_conntrack_ipv6 iptable_nat nf_defrag_ipv6 nf_conntrack_ipv4
nf_defrag_ipv4 nf_nat_ipv4 nf_nat xt_conntrack nf_conntrack ip_tables
ip6table_filter ip6_tables x_tables eeprom it87 hwmon_vid ext2
snd_usb_audio snd_usbmidi_lib snd_hwdep snd_rawmidi ppdev pwc
videobuf2_vmalloc videobuf2_memops kvm_amd kvm v4l2_common
videobuf2_core snd_hda_codec_realtek snd_hda_codec_generic videodev
snd_hda_intel snd_hda_controller cp210x snd_hda_codec usbserial snd_seq
snd_seq_device microcode snd_pcm parport_serial parport_pc parport
snd_timer k10temp snd evdev i2c_piix4 button acpi_cpufreq nfsd
auth_rpcgss oid_registry
[80346.835218]  nfs_acl lockd sunrpc binfmt_misc autofs4 hid_generic
usbhid ohci_pci ehci_pci ehci_hcd ohci_hcd radeon sr_mod cdrom fbcon
bitblit cfbfillrect softcursor cfbimgblt cfbcopyarea font i2c_algo_bit
xhci_hcd backlight drm_kms_helper ttm drm fb fbdev
[80346.835250] CPU: 3 PID: 20594 Comm: skype Tainted: G        W
3.15.8 #6
[80346.835254] Hardware name: Gigabyte Technology Co., Ltd. To be filled
by O.E.M./F2A85X-UP4, BIOS F5a 04/30/2013
[80346.835257]  0000000000000000 0000000079d580f4 ffffffff814f2373
0000000000000000
[80346.835262]  ffffffff81069fe1 0000000000000000 ffff88040ec532e8
0000000000000000
[80346.835267]  ffff88040ec530d8 ffff8803f0c46f00 ffffffffa041d832
ffff88040ec530d8
[80346.835272] Call Trace:
[80346.835283]  [<ffffffff814f2373>] ? dump_stack+0x4a/0x75
[80346.835289]  [<ffffffff81069fe1>] ? warn_slowpath_common+0x81/0xb0
[80346.835299]  [<ffffffffa041d832>] ? __vb2_queue_cancel+0x102/0x170
[videobuf2_core]
[80346.835307]  [<ffffffffa041f53d>] ? vb2_internal_streamoff+0x1d/0x50
[videobuf2_core]
[80346.835314]  [<ffffffffa06140d5>] ? uvc_queue_enable+0x75/0xb0 [uvcvideo]
[80346.835321]  [<ffffffffa0619091>] ? uvc_video_enable+0x141/0x1a0
[uvcvideo]
[80346.835327]  [<ffffffffa0615e1f>] ? uvc_v4l2_do_ioctl+0xd6f/0x1580
[uvcvideo]
[80346.835339]  [<ffffffffa0448bc0>] ? video_usercopy+0x1f0/0x490 [videodev]
[80346.835345]  [<ffffffffa06150b0>] ?
uvc_v4l2_set_streamparm.isra.12+0x1c0/0x1c0 [uvcvideo]
[80346.835352]  [<ffffffff81091d9f>] ? preempt_count_add+0x3f/0x90
[80346.835356]  [<ffffffff814f73ee>] ? _raw_spin_lock+0xe/0x30
[80346.835360]  [<ffffffff814f748d>] ? _raw_spin_unlock+0xd/0x30
[80346.835367]  [<ffffffff8110f77e>] ? __pte_alloc+0xce/0x170
[80346.835376]  [<ffffffffa04447df>] ? v4l2_ioctl+0x11f/0x160 [videodev]
[80346.835386]  [<ffffffffa04527b6>] ? do_video_ioctl+0x246/0x1330
[videodev]
[80346.835392]  [<ffffffff8111999a>] ? mmap_region+0x15a/0x5a0
[80346.835402]  [<ffffffffa0453922>] ? v4l2_compat_ioctl32+0x82/0xb8
[videodev]
[80346.835408]  [<ffffffff81186182>] ? compat_SyS_ioctl+0x132/0x1120
[80346.835414]  [<ffffffff81105833>] ? vm_mmap_pgoff+0xe3/0x120
[80346.835421]  [<ffffffff814f97c5>] ? cstar_dispatch+0x7/0x1a
[80346.835424] ---[ end trace 44e3d272b6c91a71 ]---
[80346.835427] ------------[ cut here ]------------


What is wrong here?

Kind regards,
Udo



View attachment "dmesguvc.txt" of type "text/plain" (50320 bytes)

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