drm/radeon/kms: don't allow ERESTART to hit userspace.

the pre-r600 fence code returns ebusy if we get hit by a signal
so we should continue to do that.

Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 7 insertions, 3 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_fence.c b/drivers/gpu/drm/radeon/radeon_fence.c
index 506dd4dd3a24..01a89633e265 100644
--- a/drivers/gpu/drm/radeon/radeon_fence.c
+++ b/drivers/gpu/drm/radeon/radeon_fence.c
@@ -199,7 +199,7 @@ int r600_fence_wait(struct radeon_fence *fence,  bool intr, bool lazy)
                         schedule_timeout(1);
 
                 if (intr && signal_pending(current)) {
-                        ret = -ERESTART;
+                        ret = -ERESTARTSYS;
                         break;
                 }
         }
@@ -225,8 +225,12 @@ int radeon_fence_wait(struct radeon_fence *fence, bool intr)
                 return 0;
         }
 
-        if (rdev->family >= CHIP_R600)
-                return r600_fence_wait(fence, intr, 0);
+        if (rdev->family >= CHIP_R600) {
+                r = r600_fence_wait(fence, intr, 0);
+                if (r == -ERESTARTSYS)
+                        return -EBUSY;
+                return r;
+        }
 
 retry:
         cur_jiffies = jiffies;