2017년 01월 21일 01:54에 Tobias Jakobi 이(가) 쓴 글:
> From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
>
> We were trying to print an error message if we timed out here, but the
> loop actually ends with "tries" set to UINT_MAX and not zero. Fix this
> by changing from tries-- to --tries.
Sorry but I already know this patch from long ago but I'm not clear yet.
How the variable, tries, could have UNIT_MAX?
Seems something I'm missing.
Thanks.
>
> A for loop would actually be the most natural way to do this. My fix
> means we only loop 99 times instead of 100 but that's probably ok.
>
> Fixes: a696394c5224 ('drm/exynos: mixer: simplify loop in vp_win_reset()')
> Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
> Reviewed-by: Tobias Jakobi <tjakobi@xxxxxxxxxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/exynos/exynos_mixer.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c b/drivers/gpu/drm/exynos/exynos_mixer.c
> index edb20a3..fcc7e4f 100644
> --- a/drivers/gpu/drm/exynos/exynos_mixer.c
> +++ b/drivers/gpu/drm/exynos/exynos_mixer.c
> @@ -701,7 +701,7 @@ static void vp_win_reset(struct mixer_context *ctx)
> unsigned int tries = 100;
>
> vp_reg_write(res, VP_SRESET, VP_SRESET_PROCESSING);
> - while (tries--) {
> + while (--tries) {
> /* waiting until VP_SRESET_PROCESSING is 0 */
> if (~vp_reg_read(res, VP_SRESET) & VP_SRESET_PROCESSING)
> break;
>
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