[PATCH v2] drm/rockchip: analogix_dp: Add missing error check for platform_get_resource()
From: Chen Ni <hidden>
Date: 2026-02-09 03:45:17
Also in:
dri-devel, linux-rockchip, lkml, stable
Subsystem:
arm/rockchip soc support, drm drivers, drm drivers and misc gpu patches, drm drivers for rockchip, the rest · Maintainers:
Heiko Stuebner, David Airlie, Simona Vetter, Maarten Lankhorst, Maxime Ripard, Thomas Zimmermann, Sandy Huang, Heiko Stübner, Andy Yan, Linus Torvalds
Add missing error check for platform_get_resource() return value to
prevent NULL pointer dereference when memory resource is not available.
Fixes: 718b3bb9c0ab ("drm/rockchip: analogix_dp: Expand device data to support multiple edp display")
Cc: stable@vger.kernel.org
Signed-off-by: Chen Ni <redacted>
Reviewed-by: Dragan Simic <redacted>
---
Changes in v2:
- Add Reviewed-by tag from Dragan Simic
- Add Cc stable tag as suggested
---
drivers/gpu/drm/rockchip/analogix_dp-rockchip.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
index fdab71d51e2a..3f5be14010c1 100644
--- a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
+++ b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c@@ -461,6 +461,8 @@ static int rockchip_dp_probe(struct platform_device *pdev) return -ENOMEM; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + return -EINVAL; i = 0; while (dp_data[i].reg) {
--
2.25.1