r300g: fix a race between CS and SET_TILING ioctls

3 files changed, 4 insertions, 7 deletions

diff --git a/src/gallium/drivers/r300/r300_state.c b/src/gallium/drivers/r300/r300_state.c
index aa18ab7d1e3..5d8298341d3 100644
--- a/src/gallium/drivers/r300/r300_state.c
+++ b/src/gallium/drivers/r300/r300_state.c
@@ -624,12 +624,7 @@ static void r300_tex_set_tiling_flags(struct r300_context *r300,
      * Skip changing the flags otherwise. */
     if (tex->tex.macrotile[tex->surface_level] !=
         tex->tex.macrotile[level]) {
-        /* Tiling determines how DRM treats the buffer data.
-         * We must flush CS when changing it if the buffer is referenced. */
-        if (r300->rws->cs_is_buffer_referenced(r300->cs, tex->cs_buf))
-            r300->context.flush(&r300->context, 0, NULL);
-
-        r300->rws->buffer_set_tiling(tex->buf,
+        r300->rws->buffer_set_tiling(tex->buf, r300->cs,
                 tex->tex.microtile, tex->tex.macrotile[level],
                 tex->tex.stride_in_bytes[0]);
 
diff --git a/src/gallium/drivers/r300/r300_texture.c b/src/gallium/drivers/r300/r300_texture.c
index 45a896d6109..354144cac79 100644
--- a/src/gallium/drivers/r300/r300_texture.c
+++ b/src/gallium/drivers/r300/r300_texture.c
@@ -800,7 +800,7 @@ r300_texture_create_object(struct r300_screen *rscreen,
 
     tex->cs_buf = rws->buffer_get_cs_handle(tex->buf);
 
-    rws->buffer_set_tiling(tex->buf,
+    rws->buffer_set_tiling(tex->buf, NULL,
             tex->tex.microtile, tex->tex.macrotile[0],
             tex->tex.stride_in_bytes[0]);
 
diff --git a/src/gallium/drivers/r300/r300_winsys.h b/src/gallium/drivers/r300/r300_winsys.h
index 6733253ccc9..d5c73585c81 100644
--- a/src/gallium/drivers/r300/r300_winsys.h
+++ b/src/gallium/drivers/r300/r300_winsys.h
@@ -168,6 +168,7 @@ struct r300_winsys_screen {
      * Set tiling flags describing a memory layout of a buffer object.
      *
      * \param buf       A winsys buffer object to set the flags for.
+     * \param cs        A command stream to flush if the buffer is referenced by it.
      * \param macrotile A macrotile flag.
      * \param microtile A microtile flag.
      * \param stride    A stride of the buffer in bytes, for texturing.
@@ -175,6 +176,7 @@ struct r300_winsys_screen {
      * \note microtile and macrotile are not bitmasks!
      */
     void (*buffer_set_tiling)(struct r300_winsys_bo *buf,
+                              struct r300_winsys_cs *cs,
                               enum r300_buffer_tiling microtile,
                               enum r300_buffer_tiling macrotile,
                               unsigned stride);