Hi,
I have a Macbook Pro 8,1 running Linux (Fedora) and until now I
was running the kernel provided by the distro. Today I decided to
compile a new kernel from Linus HEAD
(3613a6245b9fb5091724961e502fd1228de40f32) with the attached .config.
During boot I see the following lines:
[ 21.203874] media: Linux media interface: v0.10
[ 21.203888] usbcore: registered new interface driver bcm5974
[ 21.885849] Linux video capture interface: v2.00
[ 22.877744] uvcvideo: Found UVC 1.00 device FaceTime HD Camera
(Built-in) (05ac:8509)
[ 22.884626] uvcvideo 1-2:1.0: Entity type for entity Processing 3
was not initialized!
[ 22.887411] uvcvideo 1-2:1.0: Entity type for entity Camera 1 was
not initialized!
[ 22.889287] input: FaceTime HD Camera (Built-in) as
/devices/pci0000:00/0000:00:1a.7/usb1/1-2/1-2:1.0/input/input18
[ 22.891190] usbcore: registered new interface driver uvcvideo
[ 22.893180] USB Video Class driver (1.1.1)
When I open cheese the camera works without problems, but a lot
of messages like that appear in the kernel ring buffer:
[ 414.181611] ------------[ cut here ]------------
[ 414.181636] WARNING: CPU: 1 PID: 5763 at
drivers/media/v4l2-core/v4l2-ioctl.c:2174 v4l_cropcap+0x13c/0x160
[videodev]
[ 414.181641] Modules linked in: iptable_nat nf_nat_ipv4 nf_nat
uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2
videobuf2_core videodev media bcm5974 x86_pkg_temp_thermal coretemp
snd_hda_codec_hdmi snd_hda_codec_cirrus snd_hda_codec_generic
snd_hda_intel snd_hda_codec snd_hwdep snd_hda_core
[ 414.181682] CPU: 1 PID: 5763 Comm: cheese Not tainted
4.7.0-rc2-00004-g3613a62 #61
[ 414.181686] Hardware name: Apple Inc.
MacBookPro8,1/Mac-94245B3640C91C81, BIOS
MBP81.88Z.0047.B27.1201241646 01/24/12
[ 414.181690] 0000000000000000 ffff88008a907c18 ffffffff8155791d
0000000000000000
[ 414.181698] 0000000000000000 ffff88008a907c58 ffffffff810ace66
0000087ea01045b2
[ 414.181706] 00000000c02c563a ffff88003fef7018 ffffffffa00cc8c0
ffff88008a907da8
[ 414.181714] Call Trace:
[ 414.181724] [<ffffffff8155791d>] dump_stack+0x4f/0x72
[ 414.181732] [<ffffffff810ace66>] __warn+0xc6/0xe0
[ 414.181739] [<ffffffff810acf38>] warn_slowpath_null+0x18/0x20
[ 414.181748] [<ffffffffa00b578c>] v4l_cropcap+0x13c/0x160 [videodev]
[ 414.181758] [<ffffffffa00b721a>] __video_do_ioctl+0x26a/0x2e0 [videodev]
[ 414.181766] [<ffffffff81189b49>] ? page_cache_async_readahead+0x89/0xc0
[ 414.181774] [<ffffffff81573a63>] ? __this_cpu_preempt_check+0x13/0x20
[ 414.181781] [<ffffffff8119a652>] ? __inc_zone_state+0x42/0xa0
[ 414.181791] [<ffffffffa00b6cfb>] video_usercopy+0x30b/0x5a0 [videodev]
[ 414.181799] [<ffffffffa00b6fb0>] ? video_ioctl2+0x20/0x20 [videodev]
[ 414.181807] [<ffffffff81b78a31>] ? _raw_write_unlock+0x11/0x30
[ 414.181812] [<ffffffff81b78a59>] ? _raw_spin_unlock+0x9/0x10
[ 414.181818] [<ffffffff811a9810>] ? handle_mm_fault+0x500/0x1400
[ 414.181827] [<ffffffffa00b6fa0>] video_ioctl2+0x10/0x20 [videodev]
[ 414.181836] [<ffffffffa00b2657>] v4l2_ioctl+0xd7/0xe0 [videodev]
[ 414.181842] [<ffffffff811ea62d>] do_vfs_ioctl+0x8d/0x580
[ 414.181850] [<ffffffff811f4ca2>] ? __fget+0x72/0xa0
[ 414.181855] [<ffffffff811eab94>] SyS_ioctl+0x74/0x80
[ 414.181861] [<ffffffff81b78edb>] entry_SYSCALL_64_fastpath+0x13/0x8f
[ 414.181866] ---[ end trace fc095e890e0ec9cf ]---
This warning was introduced in commit "[media] v4l2-ioctl.c:
improve cropcap compatibility code"
(95dd7b7e30f385c1c2d5e41457c082c5f6c535b3) from 15/Apr/2016, file
drivers/media/v4l2-core/v4l2-ioctl.c:2170:
/*
* The determine_valid_ioctls() call already should ensure
* that this can never happen, but just in case...
*/
if (WARN_ON(!ops->vidioc_cropcap && !ops->vidioc_cropcap))
return -ENOTTY;
Just to emphasize: Despite the warnings, the camera is working ok.
--
Augusto Mecking Caringi
Attachment:
.config
Description: Binary data
