drm: atmel-hlcdc: fix a NULL check

If kmalloc() returned NULL we would end up dereferencing "state" a
couple lines later.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
index ac4e0632c2de..bd12231ab0cd 100644
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
@@ -414,8 +414,9 @@ atmel_hlcdc_crtc_duplicate_state(struct drm_crtc *crtc)
                 return NULL;
 
         state = kmalloc(sizeof(*state), GFP_KERNEL);
-        if (state)
-                __drm_atomic_helper_crtc_duplicate_state(crtc, &state->base);
+        if (!state)
+                return NULL;
+        __drm_atomic_helper_crtc_duplicate_state(crtc, &state->base);
 
         cur = drm_crtc_state_to_atmel_hlcdc_crtc_state(crtc->state);
         state->output_mode = cur->output_mode;