From 162e48cb1d84c2c966b649b8ac5c9d4f75f6d44f Mon Sep 17 00:00:00 2001 From: Marek Vasut Date: Fri, 31 May 2024 22:33:12 +0200 Subject: [PATCH] drm/bridge: tc358767: Check if fully initialized before signalling HPD event via IRQ 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 Reviewed-by: Robert Foss Signed-off-by: Robert Foss Link: https://patchwork.freedesktop.org/patch/msgid/20240531203333.277476-1-marex@denx.de --- 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 32409f4aef6b9..87c7346d037e7 100644 --- a/drivers/gpu/drm/bridge/tc358767.c +++ b/drivers/gpu/drm/bridge/tc358767.c @@ -2152,7 +2152,7 @@ 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. * -- 2.39.5