radeon/compute: Always report at least 1 compute unit

Some apps will abort if they detect 0 compute units.  This fixes
crashes in some OpenCV tests.

diff --git a/src/gallium/drivers/radeon/r600_pipe_common.c b/src/gallium/drivers/radeon/r600_pipe_common.c
index 4b9d31c..1911cde 100644 (file)
--- a/src/gallium/drivers/radeon/r600_pipe_common.c
+++ b/src/gallium/drivers/radeon/r600_pipe_common.c
@@ -523,7 +523,7 @@ static int r600_get_compute_param(struct pipe_screen *screen,
        case PIPE_COMPUTE_CAP_MAX_COMPUTE_UNITS:
                if (ret) {
                        uint32_t *max_compute_units = ret;
-                       *max_compute_units = rscreen->info.max_compute_units;
+                       *max_compute_units = MAX2(rscreen->info.max_compute_units, 1);
                }
                return sizeof(uint32_t);