From 4ff2f941b7828042feb2971c7039c8f790a105a4 Mon Sep 17 00:00:00 2001 From: Damon Ding Date: Fri, 28 Aug 2026 14:51:52 +0800 Subject: [PATCH] drm/bridge: analogix_dp: Add validation for samsung,lane-count property Add validity check for samsung,lane-count to ensure DT-provided lane count values are specification-compliant. Suggested-by: Luca Ceresoli Reviewed-by: Luca Ceresoli Signed-off-by: Damon Ding Link: https://patch.msgid.link/20260828065153.590802-5-damon.ding@rock-chips.com Signed-off-by: Luca Ceresoli --- drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c index ddb15d6de05f..a74c855936b2 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c @@ -1274,7 +1274,8 @@ static int analogix_dp_dt_parse_pdata(struct analogix_dp_device *dp) return dev_err_probe(dp->dev, -EINVAL, "Failed to get samsung,link-rate\n"); video_info->max_link_rate = val; - if (of_property_read_u32(dp_node, "samsung,lane-count", &val)) + if (of_property_read_u32(dp_node, "samsung,lane-count", &val) || + !drm_dp_lane_count_is_valid(val)) return dev_err_probe(dp->dev, -EINVAL, "Failed to get samsung,lane-count\n"); video_info->max_lane_count = val;