kernel/linux.git/drivers/media/dvb-core/dvb_vb2.c, branch linux-7.0.y

media: dvb-core: dvb_vb2: drop wait_prepare/finish callbacks

2025-12-18T10:14:57+00:00

Since commit 88785982a19d ("media: vb2: use lock if wait_prepare/finish are NULL") it is no longer needed to set the wait_prepare/finish vb2_ops callbacks as long as the lock field in vb2_queue is set. Set the queue lock to &ctx->mutex, which makes it possible to drop the wait_prepare/finish callbacks. This simplifies the code and this is a step towards the goal of deleting these callbacks. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab

media: dvb-core: dmxdevfilter must always flush bufs

2025-12-18T10:14:56+00:00

Currently the buffers are being filled until full, which works fine for the transport stream, but not when reading sections, those have to be returned to userspace immediately, otherwise dvbv5-scan will just wait forever. Add a 'flush' argument to dvb_vb2_fill_buffer to indicate whether the buffer must be flushed or wait until it is full. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab

media: dvb-core: add missing buffer index check

2024-10-15T05:00:58+00:00

dvb_vb2_expbuf() didn't check if the given buffer index was for a valid buffer. Add this check. Signed-off-by: Hans Verkuil Reported-by: Chenyuan Yang Closes: https://lore.kernel.org/linux-media/?q=WARNING+in+vb2_core_reqbufs Fixes: 7dc866df4012 ("media: dvb-core: Use vb2_get_buffer() instead of directly access to buffers array") Reviewed-by: Benjamin Gaignard Cc: Signed-off-by: Mauro Carvalho Chehab

media: videobuf2: core: Rename min_buffers_needed field in vb2_queue

2023-12-13T16:31:27+00:00

Rename min_buffers_needed into min_queued_buffers and update the documentation about it. Signed-off-by: Benjamin Gaignard Signed-off-by: Hans Verkuil [hverkuil: Drop the change where min_queued_buffers + 1 buffers would be] [hverkuil: allocated. Now this patch only renames this field instead of making] [hverkuil: a functional change as well.] [hverkuil: Renamed 3 remaining min_buffers_needed occurrences.]

media: dvb-core: Do not initialize twice queue num_buffer field

2023-11-23T11:10:06+00:00

The above memset already zeroed all the ctx fields, it is useless to do it here again. Signed-off-by: Benjamin Gaignard Reviewed-by: Andrzej Pietrasiewicz Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab

media: dvb-core: Use vb2_get_buffer() instead of directly access to buffers array

2023-11-23T11:09:43+00:00

Use vb2_get_buffer() instead of direct access to the vb2_queue bufs array. This allows us to change the type of the bufs in the future. After each call to vb2_get_buffer() we need to be sure that we get a valid pointer so check the return value of all of them. Signed-off-by: Benjamin Gaignard Reviewed-by: Andrzej Pietrasiewicz Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab

media: videobuf2: Use vb2_buffer instead of index

2023-11-23T10:52:04+00:00

Directly use vb2_buffer pointer instead of index inside queue array. Signed-off-by: Benjamin Gaignard Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab

media: dvb_vb2: fix possible out of bound access

2022-09-27T08:24:44+00:00

vb2_core_qbuf and vb2_core_querybuf don't check the range of b->index controlled by the user. Fix this by adding range checking code before using them. Fixes: 57868acc369a ("media: videobuf2: Add new uAPI for DVB streaming I/O") Signed-off-by: Hangyu Hua Reviewed-by: Sergey Senozhatsky Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab

media: dvb-core: Convert to SPDX identifier

2021-11-19T15:22:13+00:00

use SPDX-License-Identifier instead of a verbose license text and remove verbose license text. Link: https://lore.kernel.org/linux-media/20210916020018.8550-1-caihuoqing@baidu.com Signed-off-by: Cai Huoqing Signed-off-by: Mauro Carvalho Chehab

media: videobuf2: add queue memory coherency parameter

2021-09-30T08:07:57+00:00

Preparations for future V4L2_MEMORY_FLAG_NON_COHERENT support. Extend the vb2_core_reqbufs() parameters list to accept requests' ->flags, which will be used for memory coherency configuration. An attempt to allocate a buffer with coherency requirements that do not match the queue's consistency model will fail. Signed-off-by: Sergey Senozhatsky Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab