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drm/msm: Avoid rounding up to one jiffy

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If userspace is trying to achieve a timeout of zero, let 'em have it.
Only round up if the timeout is greater than zero.

Fixes: 4969bccd5f ("drm/msm: Avoid rounding down to zero jiffies")
Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Akhil P Oommen <quic_akhilpo@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/632264/
This commit is contained in:
Rob Clark 2025-01-13 07:48:41 -08:00
parent ef24989a62
commit 669c285620
1 changed files with 4 additions and 7 deletions
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11
drivers/gpu/drm/msm/msm_drv.h
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@ -537,15 +537,12 @@ static inline int align_pitch(int width, int bpp)
static inline unsigned long timeout_to_jiffies(const ktime_t *timeout)
{
ktime_t now = ktime_get();
s64 remaining_jiffies;
if (ktime_compare(*timeout, now) < 0) {
remaining_jiffies = 0;
} else {
ktime_t rem = ktime_sub(*timeout, now);
remaining_jiffies = ktime_divns(rem, NSEC_PER_SEC / HZ);
}
if (ktime_compare(*timeout, now) <= 0)
return 0;
ktime_t rem = ktime_sub(*timeout, now);
s64 remaining_jiffies = ktime_divns(rem, NSEC_PER_SEC / HZ);
return clamp(remaining_jiffies, 1LL, (s64)INT_MAX);
}