diff mbox series

[RFC,v4,01/42] drm: Don't treat 0 as -1 in drm_fixp2int_ceil

Message ID 20240226211100.100108-2-harry.wentland@amd.com (mailing list archive)
State New, archived
Headers show
Series Color Pipeline API w/ VKMS | expand

Commit Message

Harry Wentland Feb. 26, 2024, 9:10 p.m. UTC 
Unit testing this in VKMS shows that passing 0 into
this function returns -1, which is highly counter-
intuitive. Fix it by checking whether the input is
>= 0 instead of > 0.

Fixes: 64566b5e767f9 ("drm: Add drm_fixp_from_fraction and drm_fixp2int_ceil")
Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Reviewed-by: Simon Ser <contact@emersion.fr>
Reviewed-by: Melissa Wen <mwen@igalia.com>
---
 include/drm/drm_fixed.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Melissa Wen March 14, 2024, 1:41 p.m. UTC | #1 
On 02/26, Harry Wentland wrote:
> Unit testing this in VKMS shows that passing 0 into
> this function returns -1, which is highly counter-
> intuitive. Fix it by checking whether the input is
> >= 0 instead of > 0.
> 
> Fixes: 64566b5e767f9 ("drm: Add drm_fixp_from_fraction and drm_fixp2int_ceil")
> Signed-off-by: Harry Wentland <harry.wentland@amd.com>
> Reviewed-by: Simon Ser <contact@emersion.fr>
> Reviewed-by: Melissa Wen <mwen@igalia.com>

It was already applied upstream:
https://cgit.freedesktop.org/drm/drm-misc/commit/include?id=cf8837d7204481026335461629b84ac7f4538fa5

Thanks

Melissa
> ---
>  include/drm/drm_fixed.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/include/drm/drm_fixed.h b/include/drm/drm_fixed.h
> index 6ea339d5de08..0c9f917a4d4b 100644
> --- a/include/drm/drm_fixed.h
> +++ b/include/drm/drm_fixed.h
> @@ -95,7 +95,7 @@ static inline int drm_fixp2int_round(s64 a)
>  
>  static inline int drm_fixp2int_ceil(s64 a)
>  {
> -	if (a > 0)
> +	if (a >= 0)
>  		return drm_fixp2int(a + DRM_FIXED_ALMOST_ONE);
>  	else
>  		return drm_fixp2int(a - DRM_FIXED_ALMOST_ONE);
> -- 
> 2.44.0
>
diff mbox series

Patch

diff --git a/include/drm/drm_fixed.h b/include/drm/drm_fixed.h
index 6ea339d5de08..0c9f917a4d4b 100644
--- a/include/drm/drm_fixed.h
+++ b/include/drm/drm_fixed.h
@@ -95,7 +95,7 @@  static inline int drm_fixp2int_round(s64 a)
 
 static inline int drm_fixp2int_ceil(s64 a)
 {
-	if (a > 0)
+	if (a >= 0)
 		return drm_fixp2int(a + DRM_FIXED_ALMOST_ONE);
 	else
 		return drm_fixp2int(a - DRM_FIXED_ALMOST_ONE);