In adv7511_probe, adv7511->hpd_work is bound with adv7511_hpd_work.
If we call adv7511_remove with a unfinished work. There may be a
race condition where bridge->hpd_mutex was destroyed by
drm_bridge_remove and used in adv7511_hpd_work in drm_bridge_hpd_notify.
Fix it by canceling the work before cleanup in adv7511_remove.
Fixes: 518cb7057a59 ("drm/bridge: adv7511: Use work_struct to defer hotplug handing to out of irq context")
Signed-off-by: Zheng Wang <[email protected]>
---
drivers/gpu/drm/bridge/adv7511/adv7511_drv.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
index ddceafa7b637..9bf72dd6c1d3 100644
--- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
+++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
@@ -1349,6 +1349,7 @@ static void adv7511_remove(struct i2c_client *i2c)
{
struct adv7511 *adv7511 = i2c_get_clientdata(i2c);
+ cancel_work_sync(&adv7511->hpd_work);
adv7511_uninit_regulators(adv7511);
drm_bridge_remove(&adv7511->bridge);
--
2.25.1