Hi Daniel, On Saturday 20 August 2011 03:52:10 Daniel Dickinson wrote: > Requested output below: > > On Tue, 16 Aug 2011 20:51:32 +0200 Laurent Pinchart wrote: > > On Sunday 14 August 2011 18:31:31 Jonathan Nieder wrote: > > > Daniel Dickinson wrote[1]: > > > > New in 3.0.0: > > > > > > > > webcam oopses and then spams syslog. Didn't happen in .39 so is a > > > > regression. > > > > > > > > uvcvideo: Found UVC 1.00 device HP Webcam-101 (0bda:58e0) > > > > > > > > From syslog: > > > > > > > > [ 428.117889] Linux video capture interface: v2.00 > > > > [ 428.161164] uvcvideo: Found UVC 1.00 device HP Webcam-101 > > > > (0bda:58e0) [ 428.167520] ------------[ cut here ]------------ > > > > [ 428.167562] kernel BUG at > > > > [...]/drivers/media/media-entity.c:346! [ 428.167605] invalid > > > > opcode: 0000 [#1] SMP [ 428.167705] CPU 1 > > > > [ 428.167739] Modules linked in: uvcvideo(+) snd_seq_midi joydev > > > > videodev media v4l2_compat_ioctl32 snd_rawmidi snd_seq_midi_event > > > > snd_seq arc4 snd_timer snd_seq_device ath9k radeon(+) mac80211 > > > > ath9k_common ath9k_hw ttm ath drm_kms_helper drm snd hp_wmi > > > > cfg80211 sparse_keymap sp5100_tco edac_core soundcore rfkill > > > > i2c_algo_bit evdev snd_page_alloc edac_mce_amd psmouse k10temp > > > > shpchp i2c_piix4 serio_raw ac battery video i2c_core power_supply > > > > pci_hotplug pcspkr wmi button processor ext4 mbcache jbd2 crc16 > > > > sha256_generic cryptd aes_x86_64 aes_generic cbc dm_crypt dm_mod > > > > raid10 raid456 async_raid6_recov async_pq raid6_pq async_xor xor > > > > async_memcpy async_tx raid1 raid0 multipath linear md_mod usbhid > > > > hid sg sr_mod sd_mod cdrom crc_t10dif ohci_hcd thermal > > > > thermal_sys ahci libahci r8169 ehci_hcd mii libata scsi_mod > > > > usbcore [last unloaded: scsi_wait_scan] [ 428.170836] > > > > [ 428.170872] Pid: 659, comm: modprobe Not tainted 3.0.0-1-amd64 > > > > #1 Hewlett-Packard Presario CQ56 Notebook PC/1604 [ 428.171010] > > > > RIP: 0010:[<ffffffffa04d0d18>] [<ffffffffa04d0d18>] > > > > media_entity_create_link+0x2c/0xd4 [media] [ 428.171088] RSP: > > > > 0018:ffff8801093c5c28 EFLAGS: 00010246 [ 428.171125] RAX: > > > > ffff88010861f800 RBX: ffff88010861f870 RCX: 0000000000000000 > > > > [ 428.171163] RDX: ffff880108603870 RSI: 0000000000000000 RDI: > > > > ffff88010861f870 [ 428.171201] RBP: ffff880108603870 R08: > > > > 0000000000000003 R09: ffffffff81756440 [ 428.171238] R10: > > > > 0000000000012800 R11: 0000000000015670 R12: 0000000000000000 > > > > [ 428.171276] R13: ffff880108603870 R14: 0000000000000000 R15: > > > > 0000000000000000 [ 428.171315] FS: 00007f6831cb3700(0000) > > > > GS:ffff88010fc80000(0000) knlGS:0000000000000000 [ 428.171355] > > > > CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 428.171360] > > > > CR2: 0000000001858008 CR3: 0000000109eaa000 CR4: 00000000000006e0 > > > > [ 428.171360] DR0: 0000000000000000 DR1: 0000000000000000 DR2: > > > > 0000000000000000 [ 428.171360] DR3: 0000000000000000 DR6: > > > > 00000000ffff0ff0 DR7: 0000000000000400 [ 428.171360] Process > > > > modprobe (pid: 659, threadinfo ffff8801093c4000, task > > > > ffff880107a70300) [ 428.171360] Stack: [ 428.171360] > > > > 0000000000000002 0000000000000002 0000000000000000 > > > > ffff880108603800 [ 428.171360] ffff88010a0eac40 > > > > 0000000000000000 ffff880108603870 ffff88010a0eac58 > > > > [ 428.171360] 0000000000000000 ffffffffa04fefb1 > > > > ffff8801099c1408 ffff88010a0eac48 [ 428.171360] Call Trace: > > > > [ 428.171360] [<ffffffffa04fefb1>] ? > > > > uvc_mc_register_entities+0x160/0x1eb [uvcvideo] [ 428.171360] > > > > [<ffffffffa04f9793>] ? uvc_probe+0x1ee7/0x1f18 [uvcvideo] > > > > [ 428.171360] [<ffffffffa006c79d>] ? > > > > usb_probe_interface+0xfc/0x16f [usbcore] [ 428.171360] > > > > [<ffffffff81249a37>] ? driver_probe_device+0xb2/0x142 > > > > [ 428.171360] [<ffffffff81249b16>] ? __driver_attach+0x4f/0x6f > > > > [ 428.171360] [<ffffffff81249ac7>] ? > > > > driver_probe_device+0x142/0x142 [ 428.171360] > > > > [<ffffffff81248d22>] ? bus_for_each_dev+0x47/0x72 [ 428.171360] > > > > [<ffffffff812493a9>] ? bus_add_driver+0xa2/0x1f2 [ 428.171360] > > > > [<ffffffff81249fb0>] ? driver_register+0x8d/0xf5 [ 428.171360] > > > > [<ffffffffa006ba66>] ? usb_register_driver+0x80/0x128 [usbcore] > > > > [ 428.171360] [<ffffffffa0508000>] ? 0xffffffffa0507fff > > > > [ 428.171360] [<ffffffffa050801b>] ? uvc_init+0x1b/0x1000 > > > > [uvcvideo] [ 428.171360] [<ffffffff81002172>] ? > > > > do_one_initcall+0x78/0x132 [ 428.171360] [<ffffffff81076703>] ? > > > > sys_init_module+0xbc/0x245 [ 428.171360] [<ffffffff8133ba92>] ? > > > > system_call_fastpath+0x16/0x1b [ 428.171360] Code: 57 41 89 cf > > > > 41 56 41 89 f6 41 55 41 54 55 48 89 d5 53 48 89 fb 48 83 ec 18 48 > > > > 85 d2 74 05 48 85 ff 75 02 0f 0b 66 3b 77 3c 72 02 <0f> 0b 66 3b > > > > 4a 3c 72 02 0f 0b 44 89 44 24 08 41 bd f4 ff ff ff [ 428.171360] > > > > RIP [<ffffffffa04d0d18>] media_entity_create_link+0x2c/0xd4 > > > > [media] [ 428.171360] RSP <ffff8801093c5c28> [ 428.175002] > > > > ---[ end trace 3db524e10ad1aec0 ]--- > > > > > > > > and then: > > > > > > > > udevd[420]: timeout: killing 'usb_id --export > > > > /devices/pci0000:00/0000:00:12.2/usb1/1-3/1-3:1.0/video4linux/video0' > > > > [712] > > > > > > Known problem? Any hints for tracking it down? > > > > No it's not a know issue. I've answered (or at least tried to answer) > > the original bug report. Daniel, could you please send me the output > > of > > > > lsusb -v -d 0bda:58e0 > > > > (running as root if possible) ? > > On .39 I get the output below. On 3.0.0, the lsusb process hangs. > lsusb -v with no device shows other devices, but hangs on this one. > Also, no other usb devices work in 3.0.0 (e.g. no USB mouse) > > P.S. Thanks for the *fast* response (Jonathan thought he was slow to > respond). This isn't a critical system for me, and I can back down to > a previous version, so it's not crunch (in fact because it's for my > mother I'm thinking of tring Squeeze with only an updated alsa libs > (apparently the version of alsa in squeeze doesn't work with at least > some intel hda sound which is why I was experiment with wheezy for her > in the first place), for the stability. > > Bus 001 Device 002: ID 0bda:58e0 Realtek Semiconductor Corp. [snip] Thanks for the information. There's something unexpected in the descriptors, but that shouldn't a crash. Could you please try the following test patch on top of v3.0 ? It will print debugging messages to the kernel log which should help me to identify the root cause of the kernel oops. diff --git a/drivers/media/video/uvc/uvc_entity.c b/drivers/media/video/uvc/uvc_entity.c index 48fea37..0b8b547 100644 --- a/drivers/media/video/uvc/uvc_entity.c +++ b/drivers/media/video/uvc/uvc_entity.c @@ -56,6 +56,11 @@ static int uvc_mc_register_entity(struct uvc_video_chain *chain, continue; remote_pad = remote->num_pads - 1; + printk(KERN_INFO "connecting %s(%u):%u(/%u) to %s(%u):%u(/%u)\n", + source ? source->name : "NULL", source ? source->id : 0, + remote_pad, source ? source->num_pads : 0, + sink ? sink->name : "NULL", sink ? sink->id : 0, + i, sink ? sink->num_pads : 0); ret = media_entity_create_link(source, remote_pad, sink, i, flags); if (ret < 0) -- Regards, Laurent Pinchart -- 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
