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power: supply: bq27xxx-i2c: Do not free non existing IRQ 

[ Upstream commit 2df70149e7 ]

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: 444ff00734 ("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>
This commit is contained in:
Hans de Goede 2024-02-15 16:51:33 +01:00 committed by Greg Kroah-Hartman
parent 11aabd7487
commit fbca8bae1b
1 changed files with 3 additions and 1 deletions
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4
drivers/power/supply/bq27xxx_battery_i2c.c
View File

@ -209,7 +209,9 @@ static void 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);