[PATCH 12/27] drm/etnaviv: hold GPU lock while inserting END command

[Lucas Stach]

Inserting the END command when suspending the GPU is changing the
command buffer state, which requires the GPU to be held.

Signed-off-by: Lucas Stach <l.stach at pengutronix.de>
---
 drivers/gpu/drm/etnaviv/etnaviv_gpu.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
index 1e1e34adb07f..85f6ee1da016 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
@@ -1631,7 +1631,9 @@ static int etnaviv_gpu_hw_suspend(struct etnaviv_gpu *gpu)
 {
 	if (gpu->buffer) {
 		/* Replace the last WAIT with END */
+		mutex_lock(&gpu->lock);
 		etnaviv_buffer_end(gpu);
+		mutex_unlock(&gpu->lock);
 
 		/*
 		 * We know that only the FE is busy here, this should
-- 
2.11.0