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drm/bridge: tc358767: Check if fully initialized before signalling HPD event via IRQ

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BugLink: https://bugs.launchpad.net/bugs/2084941

[ 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@denx.de>
Reviewed-by: Robert Foss <rfoss@kernel.org>
Signed-off-by: Robert Foss <rfoss@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240531203333.277476-1-marex@denx.de
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Manuel Diewald <manuel.diewald@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
This commit is contained in:
Marek Vasut
2024-05-31 22:33:12 +02:00
committed by Mehmet Basaran
parent 7debf609e5
commit 1b57cbabc4
1 changed files with 1 additions and 1 deletions
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drivers/gpu/drm/bridge/tc358767.c
+1 -1
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@@ -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.
*