lkml.org 
[lkml]   [2023]   [Oct]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: [PATCH v10 11/54] media: videobuf2: Access vb2_queue bufs array through helper functions
From

Le 11/10/2023 à 10:44, Hans Verkuil a écrit :
> On 03/10/2023 10:06, Benjamin Gaignard wrote:
>> This patch adds 2 helpers functions to add and remove vb2 buffers
>> from a queue. With these 2 and vb2_get_buffer(), bufs field of
>> struct vb2_queue becomes like a private member of the structure.
>>
>> 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.
> This needs to be extended: checking the returned pointer is a preparation
> for when buffers can be deleted. As it is right now, checking for a
> NULL pointer isn't needed.
>
> I wonder if it isn't better to drop those checks and instead apply them
> at the tail end of this series when the actual work on deleting buffers
> starts (before patch 49, I think).

I think that checking vb2_get_buffer() return value while removing direct
call to queue buffers array doesn't hurt here.
It is also needed to do that before "media: videobuf2: Add helper to get queue number of buffers" patch.

Regards,
Benjamin

>
> Regards,
>
> Hans
>
>> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
>> ---
>> .../media/common/videobuf2/videobuf2-core.c | 151 +++++++++++++-----
>> .../media/common/videobuf2/videobuf2-v4l2.c | 51 ++++--
>> 2 files changed, 146 insertions(+), 56 deletions(-)
>

\
 
 \ /
  Last update: 2023-10-11 11:33    [W:0.100 / U:0.740 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site