gpu/drm/radeon/radeon_irq.c: move a dereference below a NULL test

If a NULL value is possible, the dereference should only occur after the
NULL test.

Coverity CID: 13338

Signed-off-by: Darren Jenkins <darrenrjenkins@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 5 insertions, 5 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_irq.c b/drivers/gpu/drm/radeon/radeon_irq.c
index b79ecc4a7cc4..2f349a300195 100644
--- a/drivers/gpu/drm/radeon/radeon_irq.c
+++ b/drivers/gpu/drm/radeon/radeon_irq.c
@@ -289,16 +289,16 @@ int radeon_irq_emit(struct drm_device *dev, void *data, struct drm_file *file_pr
         drm_radeon_irq_emit_t *emit = data;
         int result;
 
-        if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_R600)
-                return -EINVAL;
-
-        LOCK_TEST_WITH_RETURN(dev, file_priv);
-
         if (!dev_priv) {
                 DRM_ERROR("called with no initialization\n");
                 return -EINVAL;
         }
 
+        if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_R600)
+                return -EINVAL;
+
+        LOCK_TEST_WITH_RETURN(dev, file_priv);
+
         result = radeon_emit_irq(dev);
 
         if (DRM_COPY_TO_USER(emit->irq_seq, &result, sizeof(int))) {