linux-kernel - Re: [PATCH v5 1/3] videobuf2: core: Rename min_buffers_needed field to vb2

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Date:   Wed, 13 Dec 2023 17:39:05 +0100
From:   Hans Verkuil <hverkuil@...all.nl>
To:     Benjamin Gaignard <benjamin.gaignard@...labora.com>,
        mchehab@...nel.org, tfiga@...omium.org
Cc:     linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
        linux-staging@...ts.linux.dev, kernel@...labora.com
Subject: Re: [PATCH v5 1/3] videobuf2: core: Rename min_buffers_needed field
 to vb2_queue

Hi Benjamin,

On 11/12/2023 14:32, Benjamin Gaignard wrote:
> Rename min_buffers_needed into min_queued_buffers and update
> the documentation about it.

I merged this patch, but not the others. I also dropped one functional
change:

<snip>

> diff --git a/drivers/media/common/videobuf2/videobuf2-core.c b/drivers/media/common/videobuf2/videobuf2-core.c
> index 40d89f29fa33..8912dff5bde3 100644
> --- a/drivers/media/common/videobuf2/videobuf2-core.c
> +++ b/drivers/media/common/videobuf2/videobuf2-core.c
> @@ -865,7 +865,7 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory,
>  	/*
>  	 * Make sure the requested values and current defaults are sane.
>  	 */
> -	num_buffers = max_t(unsigned int, *count, q->min_buffers_needed);
> +	num_buffers = max_t(unsigned int, *count, q->min_queued_buffers + 1);
>  	num_buffers = min_t(unsigned int, num_buffers, q->max_num_buffers);
>  	memset(q->alloc_devs, 0, sizeof(q->alloc_devs));
>  	/*

That "+ 1" didn't really belong here, since everything else was just renaming a
field. Such a patch shouldn't make any other changes.

There were also three more occurrences of min_buffers_needed (one in a comment,
two in a vivid function argument), and I renamed those as well.

'git grep min_buffers_needed' now no longer shows any hits.

I decided not to take the other patches, I think it is best if you rebase
and repost the series on top of staging and in the new year we'll continue with
it. I did not feel that I had enough time to really review the remaining patches.

However, it is nice to have this large rename patch merged. It touches on a lot
of files, so it is annoying to have to carry that around. And now was a good
moment to merge it.

Regards,

	Hans