lkml.org 
[lkml]   [2023]   [Mar]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] drm/bridge: adv7511: fix race condition bug in adv7511_remove due to unfinished work
Date
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.

Signed-off-by: Zheng Wang <zyytlz.wz@163.com>
---
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
\
 
 \ /
  Last update: 2023-03-27 00:50    [W:0.060 / U:0.040 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site