r600g: print to stderr that a CS has been rejected by the kernel

Just fixing the warning that r is unused.

diff --git a/src/gallium/winsys/r600/drm/r600_hw_context.c b/src/gallium/winsys/r600/drm/r600_hw_context.c
index 922367d..365ab15 100644 (file)
--- a/src/gallium/winsys/r600/drm/r600_hw_context.c
+++ b/src/gallium/winsys/r600/drm/r600_hw_context.c
@@ -1537,6 +1537,10 @@ void r600_context_flush(struct r600_context *ctx)
        chunk_array[1] = (uint64_t)(uintptr_t)&chunks[1];
        r = drmCommandWriteRead(ctx->radeon->fd, DRM_RADEON_CS, &drmib,
                                sizeof(struct drm_radeon_cs));
+       if (r) {
+               fprintf(stderr, "radeon: The kernel rejected CS, "
+                       "see dmesg for more information.\n");
+       }
 #else
        *ctx->radeon->cfence = ctx->radeon->fence;
 #endif