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Commit 2559d19f authored by Stephane Viau's avatar Stephane Viau Committed by Rob Clark
Browse files

drm/msm/mdp5: Fix negative SMP block allocation 



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: default avatarStephane Viau <sviau@codeaurora.org>
Signed-off-by: default avatarRob Clark <robdclark@gmail.com>
parent cddfaebd

drivers/gpu/drm/msm/mdp/mdp5/mdp5_smp.c

+3 −2
Original line number Diff line number Diff line
@@ -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) {