From: Hans de Goede hdegoede@redhat.com
stable inclusion from stable-v5.10.212 commit d7acc4a569f5f4513120c85ea2b9f04909b7490f category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9Q8ME
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit 2df70149e73e79783bcbc7db4fa51ecef0e2022c ]
The bq27xxx i2c-client may not have an IRQ, in which case client->irq will be 0. bq27xxx_battery_i2c_probe() already has an if (client->irq) check wrapping the request_threaded_irq().
But bq27xxx_battery_i2c_remove() unconditionally calls free_irq(client->irq) leading to:
[ 190.310742] ------------[ cut here ]------------ [ 190.310843] Trying to free already-free IRQ 0 [ 190.310861] WARNING: CPU: 2 PID: 1304 at kernel/irq/manage.c:1893 free_irq+0x1b8/0x310
Followed by a backtrace when unbinding the driver. Add an if (client->irq) to bq27xxx_battery_i2c_remove() mirroring probe() to fix this.
Fixes: 444ff00734f3 ("power: supply: bq27xxx: Fix I2C IRQ race on remove") Signed-off-by: Hans de Goede hdegoede@redhat.com Link: https://lore.kernel.org/r/20240215155133.70537-1-hdegoede@redhat.com Signed-off-by: Sebastian Reichel sebastian.reichel@collabora.com Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Wang Hai wanghai38@huawei.com --- drivers/power/supply/bq27xxx_battery_i2c.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/power/supply/bq27xxx_battery_i2c.c b/drivers/power/supply/bq27xxx_battery_i2c.c index 0e32efb10ee7..6fbae8fc2e50 100644 --- a/drivers/power/supply/bq27xxx_battery_i2c.c +++ b/drivers/power/supply/bq27xxx_battery_i2c.c @@ -209,7 +209,9 @@ static int bq27xxx_battery_i2c_remove(struct i2c_client *client) { struct bq27xxx_device_info *di = i2c_get_clientdata(client);
- free_irq(client->irq, di); + if (client->irq) + free_irq(client->irq, di); + bq27xxx_battery_teardown(di);
mutex_lock(&battery_mutex);