Merge branch 'arm-aesbs' of git://git.linaro.org/people/ardbiesheuvel/linux-arm into devel-stable

1 files changed, 9 insertions, 1 deletions

diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
index a60584763b61..a0b9d8a95b16 100644
--- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
@@ -124,6 +124,8 @@ void adreno_recover(struct msm_gpu *gpu)
 
         /* reset completed fence seqno, just discard anything pending: */
         adreno_gpu->memptrs->fence = gpu->submitted_fence;
+        adreno_gpu->memptrs->rptr  = 0;
+        adreno_gpu->memptrs->wptr  = 0;
 
         gpu->funcs->pm_resume(gpu);
         ret = gpu->funcs->hw_init(gpu);
@@ -229,7 +231,7 @@ void adreno_idle(struct msm_gpu *gpu)
                         return;
         } while(time_before(jiffies, t));
 
-        DRM_ERROR("timeout waiting for %s to drain ringbuffer!\n", gpu->name);
+        DRM_ERROR("%s: timeout waiting to drain ringbuffer!\n", gpu->name);
 
         /* TODO maybe we need to reset GPU here to recover from hang? */
 }
@@ -256,11 +258,17 @@ void adreno_wait_ring(struct msm_gpu *gpu, uint32_t ndwords)
 {
         struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
         uint32_t freedwords;
+        unsigned long t = jiffies + ADRENO_IDLE_TIMEOUT;
         do {
                 uint32_t size = gpu->rb->size / 4;
                 uint32_t wptr = get_wptr(gpu->rb);
                 uint32_t rptr = adreno_gpu->memptrs->rptr;
                 freedwords = (rptr + (size - 1) - wptr) % size;
+
+                if (time_after(jiffies, t)) {
+                        DRM_ERROR("%s: timeout waiting for ringbuffer space\n", gpu->name);
+                        break;
+                }
         } while(freedwords < ndwords);
 }