since kernel 4.5.3 a severe bug has been introduced with commit 2c1f6951a8a82e6de0d82b1158b5e493fc6c54ab ( [media] videobuf2-v4l2: Verify planes array in buffer dequeueing ),
a system freeze will occur with TV cards ( DVB-T ), for example with "leadtek winfast DTV1000T", "leadtek winfast DTV1800H", "Avermedia" and many others, https://bugzilla.kernel.org/show_bug.cgi?id=118061 one quick fix is to revert this commit --- a/drivers/media/v4l2-core/videobuf2-v4l2.c 2016-05-12 06:14:24.000000000 +0200 +++ b/drivers/media/v4l2-core/videobuf2-v4l2.c 2016-05-12 06:21:16.773477390 +0200 @@ -74,10 +74,6 @@ return 0; } -static int __verify_planes_array_core(struct vb2_buffer *vb, const void *pb) -{ - return __verify_planes_array(vb, pb); -} /** * __verify_length() - Verify that the bytesused value for each plane fits in @@ -442,7 +438,6 @@ } static const struct vb2_buf_ops v4l2_buf_ops = { - .verify_planes_array = __verify_planes_array_core, .fill_user_buffer = __fill_v4l2_buffer, .fill_vb2_buffer = __fill_vb2_buffer, .copy_timestamp = __copy_timestamp,
