iris: fix sample mask for MSAA-off

diff --git a/src/gallium/drivers/iris/iris_state.c b/src/gallium/drivers/iris/iris_state.c
index e4ecba6825491bb40e415ae62dcd76c9fdd184f0..3e646584045cf41d185a7f4b33e21b8e49691ae9 100644 (file)
--- a/src/gallium/drivers/iris/iris_state.c
+++ b/src/gallium/drivers/iris/iris_state.c
@@ -1169,7 +1169,7 @@ iris_set_sample_mask(struct pipe_context *ctx, unsigned sample_mask)
 {
    struct iris_context *ice = (struct iris_context *) ctx;
 
-   ice->state.sample_mask = sample_mask;
+   ice->state.sample_mask = sample_mask == 0xffffffff ? 1 : sample_mask;
    ice->state.dirty |= IRIS_DIRTY_SAMPLE_MASK;
 }