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SubjectRe: [PATCH][next] media: staging: intel-ipu3: fix unsigned comparison with < 0
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On 22/12/2018 11:49, Colin King wrote:
> From: Colin Ian King <colin.king@canonical.com>
>
> The comparison css->pipes[pipe].bindex < 0 is always false because
> bindex is an unsigned int. Fix this by using a signed integer for
> the comparison.
>
> Detected by CoverityScan, CID#1476023 ("Unsigned compared against 0")
>
> Fixes: f5f2e4273518 ("media: staging/intel-ipu3: Add css pipeline programming")
> Signed-off-by: Colin Ian King <colin.king@canonical.com>
> ---
> drivers/staging/media/ipu3/ipu3-css.c | 8 ++++----
> 1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/staging/media/ipu3/ipu3-css.c b/drivers/staging/media/ipu3/ipu3-css.c
> index 44c55639389a..b9354d2bb692 100644
> --- a/drivers/staging/media/ipu3/ipu3-css.c
> +++ b/drivers/staging/media/ipu3/ipu3-css.c
> @@ -1751,7 +1751,7 @@ int ipu3_css_fmt_try(struct ipu3_css *css,
> &q[IPU3_CSS_QUEUE_OUT].fmt.mpix;
> struct v4l2_pix_format_mplane *const vf =
> &q[IPU3_CSS_QUEUE_VF].fmt.mpix;
> - int i, s;
> + int i, s, ret;
>
> /* Adjust all formats, get statistics buffer sizes and formats */
> for (i = 0; i < IPU3_CSS_QUEUES; i++) {
> @@ -1826,12 +1826,12 @@ int ipu3_css_fmt_try(struct ipu3_css *css,
> s = (bds->height - gdc->height) / 2 - FILTER_SIZE;
> env->height = s < MIN_ENVELOPE ? MIN_ENVELOPE : s;
>
> - css->pipes[pipe].bindex =
> - ipu3_css_find_binary(css, pipe, q, r);
> - if (css->pipes[pipe].bindex < 0) {
> + ret = ipu3_css_find_binary(css, pipe, q, r);
> + if (ret < 0) {
> dev_err(css->dev, "failed to find suitable binary\n");
> return -EINVAL;
> }
> + css->pipes[pipe].bindex = ret;
>
> dev_dbg(css->dev, "Binary index %d for pipe %d found.",
> css->pipes[pipe].bindex, pipe);
>

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