drm/stm: ltdc: check memory returned by devm_kzalloc()

[ Upstream commit fd39730c58890cd7f0a594231e19bb357f28877c ]

devm_kzalloc() can fail and return NULL pointer. Check its return status.
Identified with Coccinelle (kmerr.cocci script).

Fixes: 484e72d3146b ("drm/stm: ltdc: add support of ycbcr pixel formats")
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Acked-by: Raphael Gallais-Pou <raphael.gallais-pou@foss.st.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230531072854.142629-1-claudiu.beznea@microchip.com
Signed-off-by: Raphael Gallais-Pou <raphael.gallais-pou@foss.st.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/gpu/drm/stm/ltdc.c b/drivers/gpu/drm/stm/ltdc.c
index 5576fdae4962335e46dedaaeb320c302fb770c3b..5aec1e58c968c29a5573c75c6d53fae2000fc206 100644 (file)
--- a/drivers/gpu/drm/stm/ltdc.c
+++ b/drivers/gpu/drm/stm/ltdc.c
@@ -1580,6 +1580,8 @@ static struct drm_plane *ltdc_plane_create(struct drm_device *ddev,
                               ARRAY_SIZE(ltdc_drm_fmt_ycbcr_sp) +
                               ARRAY_SIZE(ltdc_drm_fmt_ycbcr_fp)) *
                               sizeof(*formats), GFP_KERNEL);
+       if (!formats)
+               return NULL;
 
        for (i = 0; i < ldev->caps.pix_fmt_nb; i++) {
                drm_fmt = ldev->caps.pix_fmt_drm[i];