[PATCH AUTOSEL 6.6 46/83] drm/bridge: tc358767: Check if fully initialized before signalling HPD event via IRQ

[Sasha Levin]

From: Marek Vasut <marex@xxxxxxx>

[ Upstream commit 162e48cb1d84c2c966b649b8ac5c9d4f75f6d44f ]

Make sure the connector is fully initialized before signalling any
HPD events via drm_kms_helper_hotplug_event(), otherwise this may
lead to NULL pointer dereference.

Signed-off-by: Marek Vasut <marex@xxxxxxx>
Reviewed-by: Robert Foss <rfoss@xxxxxxxxxx>
Signed-off-by: Robert Foss <rfoss@xxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20240531203333.277476-1-marex@xxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/gpu/drm/bridge/tc358767.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/bridge/tc358767.c b/drivers/gpu/drm/bridge/tc358767.c
index d941c3a0e6113..7fd4a5fe03edf 100644
--- a/drivers/gpu/drm/bridge/tc358767.c
+++ b/drivers/gpu/drm/bridge/tc358767.c
@@ -2034,7 +2034,7 @@ static irqreturn_t tc_irq_handler(int irq, void *arg)
 		dev_err(tc->dev, "syserr %x\n", stat);
 	}
 
-	if (tc->hpd_pin >= 0 && tc->bridge.dev) {
+	if (tc->hpd_pin >= 0 && tc->bridge.dev && tc->aux.drm_dev) {
 		/*
 		 * H is triggered when the GPIO goes high.
 		 *
-- 
2.43.0