HI Augusto, On Wed, Jun 08, 2016 at 02:00:46AM -0300, Augusto Mecking Caringi wrote: > 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. It's a bug, which I believe is fixed by this patch: <URL:http://www.spinics.net/lists/linux-media/msg100627.html> -- Kind regards, Sakari Ailus e-mail: sakari.ailus@xxxxxx XMPP: sailus@xxxxxxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
