[PATCH RESEND] drm/komeda: Add check for komeda_get_layer_fourcc_list()

[Haoxiang Li]

Add check for the return value of komeda_get_layer_fourcc_list()
to catch the potential exception.

Fixes: 5d51f6c0da1b ("drm/komeda: Add writeback support")
Cc: sta...@vger.kernel.org
Signed-off-by: Haoxiang Li <haoxiang_li2...@163.com>
---
 drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c 
b/drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c
index ebccb74306a7..f30b3d5eeca5 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c
@@ -160,6 +160,10 @@ static int komeda_wb_connector_add(struct komeda_kms_dev 
*kms,
        formats = komeda_get_layer_fourcc_list(&mdev->fmt_tbl,
                                               kwb_conn->wb_layer->layer_type,
                                               &n_formats);
+       if (!formats) {
+               kfree(kwb_conn);
+               return -ENOMEM;
+       }
 
        err = drm_writeback_connector_init(&kms->base, wb_conn,
                                           &komeda_wb_connector_funcs,
-- 
2.25.1