X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Fgallium%2Fwinsys%2Fdrm%2Fradeon%2Fcore%2Fradeon_r300.c;h=d759beaba137b9eb484fe39c5250bc66b97046bc;hb=43867acb6afc7fad26cdc2f22b2a3bb6eeefb2da;hp=0875ee41cbfd76d0311258cd5871331f44bff330;hpb=7b5ad23c7f7f9016f725cb1caa3cf8971aeedbc8;p=mesa.git

diff --git a/src/gallium/winsys/drm/radeon/core/radeon_r300.c b/src/gallium/winsys/drm/radeon/core/radeon_r300.c
index 0875ee41cbf..d759beaba13 100644
--- a/src/gallium/winsys/drm/radeon/core/radeon_r300.c
+++ b/src/gallium/winsys/drm/radeon/core/radeon_r300.c
@@ -81,9 +81,13 @@ static void radeon_write_cs_reloc(struct radeon_winsys* winsys,
                                   uint32_t flags)
 {
     int retval = 0;
+    struct radeon_pipe_buffer* radeon_buffer =
+        (struct radeon_pipe_buffer*)pbuffer;
 
-    retval = radeon_cs_write_reloc(winsys->priv->cs,
-            ((struct radeon_pipe_buffer*)pbuffer)->bo, rd, wd, flags);
+    assert(!radeon_buffer->pb);
+
+    retval = radeon_cs_write_reloc(winsys->priv->cs, radeon_buffer->bo,
+                                   rd, wd, flags);
 
     if (retval) {
         debug_printf("radeon: Relocation of %p (%d, %d, %d) failed!\n",
@@ -108,6 +112,11 @@ static void radeon_flush_cs(struct radeon_winsys* winsys)
 {
     int retval;
 
+    /* Don't flush a zero-sized CS. */
+    if (!winsys->priv->cs->cdw) {
+        return;
+    }
+
     /* Emit the CS. */
     retval = radeon_cs_emit(winsys->priv->cs);
     if (retval) {