linux-kernel - Re: [PATCH] [media] coda: remove redundant call to v4l2_m2m_get

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Date:   Mon, 27 Mar 2017 11:46:27 +0200
From:   Hans Verkuil <hverkuil@...all.nl>
To:     Colin King <colin.king@...onical.com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [media] coda: remove redundant call to v4l2_m2m_get_vq

On 23/03/17 12:57, Colin King wrote:
> From: Colin Ian King <colin.king@...onical.com>
> 
> The call to v4ls_m2m_get_vq is only used to get the return value
> which is not being used, so it appears to be redundant and can
> be removed.
> 
> Detected with CoverityScan, CID#1420674 ("Useless call")
> 
> Signed-off-by: Colin Ian King <colin.king@...onical.com>
> ---
>  drivers/media/platform/coda/coda-common.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/drivers/media/platform/coda/coda-common.c b/drivers/media/platform/coda/coda-common.c
> index 800d2477f1a0..95e4648f18e6 100644
> --- a/drivers/media/platform/coda/coda-common.c
> +++ b/drivers/media/platform/coda/coda-common.c
> @@ -817,8 +817,6 @@ static int coda_qbuf(struct file *file, void *priv,
>  static bool coda_buf_is_end_of_stream(struct coda_ctx *ctx,
>  				      struct vb2_v4l2_buffer *buf)
>  {
> -	v4l2_m2m_get_vq(ctx->fh.m2m_ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
> -
>  	return ((ctx->bit_stream_param & CODA_BIT_STREAM_END_FLAG) &&
>  		(buf->sequence == (ctx->qsequence - 1)));
>  }
> 

Philipp, is this correct, or should this actually check whether the queue is an
output queue?

Regards,

	Hans