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drm/etnaviv: add lockdep assert to fence allocation
author
Lucas Stach
<l.stach@pengutronix.de>
Wed, 22 Mar 2017 11:23:43 +0000
(12:23 +0100)
committer
Lucas Stach
<l.stach@pengutronix.de>
Wed, 29 Mar 2017 13:52:26 +0000
(15:52 +0200)
Make sure the GPU lock is taken, so that fence completion order matches
seqno order.
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
drivers/gpu/drm/etnaviv/etnaviv_gpu.c
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diff --git
a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
index
130d7d5
..
a81a2e8
100644
(file)
--- a/
drivers/gpu/drm/etnaviv/etnaviv_gpu.c
+++ b/
drivers/gpu/drm/etnaviv/etnaviv_gpu.c
@@
-1051,6
+1051,12
@@
static struct dma_fence *etnaviv_gpu_fence_alloc(struct etnaviv_gpu *gpu)
{
struct etnaviv_fence *f;
+ /*
+ * GPU lock must already be held, otherwise fence completion order might
+ * not match the seqno order assigned here.
+ */
+ lockdep_assert_held(&gpu->lock);
+
f = kzalloc(sizeof(*f), GFP_KERNEL);
if (!f)
return NULL;