Hi all,
With a 3.19-rc3 kernel i'm running into the warning below on boot with a
pvrusb2 device.
It's hitting this warn:
/*
* Drivers MUST fill in device_caps, so check for this and
* warn if it was forgotten.
*/
WARN_ON(!(cap->capabilities & V4L2_CAP_DEVICE_CAPS) ||
!cap->device_caps);
--
Sander
[ 25.604846] ------------[ cut here ]------------
[ 25.622165] WARNING: CPU: 4 PID: 2133 at
drivers/media/v4l2-core/v4l2-ioctl.c:1025 v4l_querycap+0x3e/0x70()
[ 25.654888] Modules linked in:
[ 25.667494] CPU: 4 PID: 2133 Comm: v4l_id Not tainted
3.19.0-rc3-20150110-pciback-doflr+ #1
[ 25.695927] Hardware name: MSI MS-7640/890FXA-GD70 (MS-7640) , BIOS V1.8B1
09/13/2010
[ 25.723022] ffffffff81fcf468 ffff880546fefbc8 ffffffff81bb3fc9
ffff880544a83240
[ 25.748684] 0000000000000000 ffff880546fefc08 ffffffff810c738d
ffff880544a83240
[ 25.774301] ffff880546fefd38 0000000080685600 0000000000000000
ffff880544b78e00
[ 25.799936] Call Trace:
[ 25.810584] [<ffffffff81bb3fc9>] dump_stack+0x45/0x57
[ 25.829319] [<ffffffff810c738d>] warn_slowpath_common+0x8d/0xd0
[ 25.850669] [<ffffffff810c73e5>] warn_slowpath_null+0x15/0x20
[ 25.871477] [<ffffffff81851fae>] v4l_querycap+0x3e/0x70
[ 25.890692] [<ffffffff818513f4>] __video_do_ioctl+0x284/0x300
[ 25.911478] [<ffffffff81103556>] ? __lock_acquire+0x4e6/0x21a0
[ 25.932412] [<ffffffff818521d1>] video_usercopy+0x1f1/0x4e0
[ 25.952525] [<ffffffff81851170>] ? v4l_printk_ioctl+0xa0/0xa0
[ 25.973136] [<ffffffff811018dd>] ? trace_hardirqs_on+0xd/0x10
[ 25.993791] [<ffffffff818524d0>] video_ioctl2+0x10/0x20
[ 26.012844] [<ffffffff81892df7>] pvr2_v4l2_ioctl+0xa7/0x180
[ 26.032939] [<ffffffff8184e2ff>] v4l2_ioctl+0x12f/0x150
[ 26.051927] [<ffffffff811d6163>] do_vfs_ioctl+0x83/0x5b0
[ 26.071161] [<ffffffff811d3321>] ? final_putname+0x21/0x50
[ 26.090911] [<ffffffff81bbf995>] ? sysret_check+0x22/0x5d
[ 26.110395] [<ffffffff811d66d7>] SyS_ioctl+0x47/0x90
[ 26.128537] [<ffffffff81bbf969>] system_call_fastpath+0x12/0x17
[ 26.149531] ---[ end trace 52e366625e9023ef ]---
[ 26.166528] ------------[ cut here ]------------
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