In case we request a number of SMP blocks which is lower than
the already reserved blocks, we should not try to allocate a
negative number, but 0 blocks instead.
Signed-off-by: Stephane Viau <sviau at codeaurora.org>
---
drivers/gpu/drm/msm/mdp/mdp5/mdp5_smp.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_smp.c
b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_smp.c
index bf55188..1f795af89 100644
--- a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_smp.c
+++ b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_smp.c
@@ -119,9 +119,10 @@ static int smp_request_block(struct mdp5_smp *smp,
spin_lock_irqsave(&smp->state_lock, flags);
- nblks -= reserved;
- if (reserved)
+ if (reserved) {
+ nblks = max(0, nblks - reserved);
DBG("%d MMBs allocated (%d reserved)", nblks, reserved);
+ }
avail = cnt - bitmap_weight(smp->state, cnt);
if (nblks > avail) {
--
Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a
Linux Foundation Collaborative Project
