[PATCH v2 2/2] drm: adv7511: Fix out-of-bounds array in clock_div_by_lanes

[Biju Das]

Fix out-of-bounds array in adv7511_dsi_config_timing_gen(),
when dsi lanes = 1.

Fixes: 78fa479d703c ("drm/bridge: adv7533: Use internal timing generator")
Reported-by: Hien Huynh <hien.huynh.px at renesas.com>
Signed-off-by: Biju Das <biju.das.jz at bp.renesas.com>
---
Changes in v2:
 - Added the tag "Cc: stable at vger.kernel.org" in the sign-off area.
 - Dropped Archit Taneja invalid Mail address
---
 drivers/gpu/drm/bridge/adv7511/adv7533.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/bridge/adv7511/adv7533.c b/drivers/gpu/drm/bridge/adv7511/adv7533.c
index 3e57ba838e5e..0c2236e53af5 100644
--- a/drivers/gpu/drm/bridge/adv7511/adv7533.c
+++ b/drivers/gpu/drm/bridge/adv7511/adv7533.c
@@ -185,6 +185,9 @@ int adv7533_parse_dt(struct device_node *np, struct adv7511 *adv)
 	adv->use_timing_gen = !of_property_read_bool(np,
 						"adi,disable-timing-generator");
 
+	if (adv->use_timing_gen && num_lanes == 1)
+		return -EINVAL;
+
 	/* TODO: Check if these need to be parsed by DT or not */
 	adv->rgb = true;
 	adv->embedded_sync = false;
-- 
2.43.0