1 files changed, 16 insertions, 3 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_semaphore.c b/drivers/gpu/drm/radeon/radeon_semaphore.c
index 2b42aa1914f2..9006b32d5eed 100644
--- a/drivers/gpu/drm/radeon/radeon_semaphore.c
+++ b/drivers/gpu/drm/radeon/radeon_semaphore.c
@@ -34,14 +34,15 @@
 int radeon_semaphore_create(struct radeon_device *rdev,
                             struct radeon_semaphore **semaphore)
 {
+        uint32_t *cpu_addr;
         int i, r;
 
         *semaphore = kmalloc(sizeof(struct radeon_semaphore), GFP_KERNEL);
         if (*semaphore == NULL) {
                 return -ENOMEM;
         }
-        r = radeon_sa_bo_new(rdev, &rdev->ring_tmp_bo,
-                             &(*semaphore)->sa_bo, 8, 8, true);
+        r = radeon_sa_bo_new(rdev, &rdev->ring_tmp_bo, &(*semaphore)->sa_bo,
+                             8 * RADEON_NUM_SYNCS, 8, true);
         if (r) {
                 kfree(*semaphore);
                 *semaphore = NULL;
@@ -49,7 +50,10 @@ int radeon_semaphore_create(struct radeon_device *rdev,
         }
         (*semaphore)->waiters = 0;
         (*semaphore)->gpu_addr = radeon_sa_bo_gpu_addr((*semaphore)->sa_bo);
-        *((uint64_t*)radeon_sa_bo_cpu_addr((*semaphore)->sa_bo)) = 0;
+
+        cpu_addr = radeon_sa_bo_cpu_addr((*semaphore)->sa_bo);
+        for (i = 0; i < RADEON_NUM_SYNCS; ++i)
+                cpu_addr[i] = 0;
 
         for (i = 0; i < RADEON_NUM_RINGS; ++i)
                 (*semaphore)->sync_to[i] = NULL;
@@ -125,6 +129,7 @@ int radeon_semaphore_sync_rings(struct radeon_device *rdev,
                                 struct radeon_semaphore *semaphore,
                                 int ring)
 {
+        unsigned count = 0;
         int i, r;
 
         for (i = 0; i < RADEON_NUM_RINGS; ++i) {
@@ -140,6 +145,12 @@ int radeon_semaphore_sync_rings(struct radeon_device *rdev,
                         return -EINVAL;
                 }
 
+                if (++count > RADEON_NUM_SYNCS) {
+                        /* not enough room, wait manually */
+                        radeon_fence_wait_locked(fence);
+                        continue;
+                }
+
                 /* allocate enough space for sync command */
                 r = radeon_ring_alloc(rdev, &rdev->ring[i], 16);
                 if (r) {
@@ -164,6 +175,8 @@ int radeon_semaphore_sync_rings(struct radeon_device *rdev,
 
                 radeon_ring_commit(rdev, &rdev->ring[i]);
                 radeon_fence_note_sync(fence, ring);
+
+                semaphore->gpu_addr += 8;
         }
 
         return 0;