This is a note to let you know that I've just added the patch titled
power: supply: bq27xxx: Fix I2C IRQ race on remove
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
power-supply-bq27xxx-fix-i2c-irq-race-on-remove.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 444ff00734f3878cd54ddd1ed5e2e6dbea9326d5 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@xxxxxxxxxx>
Date: Sat, 15 Apr 2023 20:23:33 +0200
Subject: power: supply: bq27xxx: Fix I2C IRQ race on remove
From: Hans de Goede <hdegoede@xxxxxxxxxx>
commit 444ff00734f3878cd54ddd1ed5e2e6dbea9326d5 upstream.
devm_request_threaded_irq() requested IRQs are only free-ed after
the driver's remove function has ran. So the IRQ could trigger and
call bq27xxx_battery_update() after bq27xxx_battery_teardown() has
already run.
Switch to explicitly free-ing the IRQ in bq27xxx_battery_i2c_remove()
to fix this.
Fixes: 8807feb91b76 ("power: bq27xxx_battery: Add interrupt handling support")
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
Signed-off-by: Sebastian Reichel <sebastian.reichel@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/power/supply/bq27xxx_battery_i2c.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/power/supply/bq27xxx_battery_i2c.c
+++ b/drivers/power/supply/bq27xxx_battery_i2c.c
@@ -187,7 +187,7 @@ static int bq27xxx_battery_i2c_probe(str
i2c_set_clientdata(client, di);
if (client->irq) {
- ret = devm_request_threaded_irq(&client->dev, client->irq,
+ ret = request_threaded_irq(client->irq,
NULL, bq27xxx_battery_irq_handler_thread,
IRQF_ONESHOT,
di->name, di);
@@ -217,6 +217,7 @@ static int bq27xxx_battery_i2c_remove(st
{
struct bq27xxx_device_info *di = i2c_get_clientdata(client);
+ free_irq(client->irq, di);
bq27xxx_battery_teardown(di);
mutex_lock(&battery_mutex);
Patches currently in stable-queue which might be from hdegoede@xxxxxxxxxx are
queue-4.19/power-supply-leds-fix-blink-to-led-on-transition.patch
queue-4.19/power-supply-bq27xxx-fix-i2c-irq-race-on-remove.patch
queue-4.19/power-supply-bq27xxx-fix-bq27xxx_battery_update-race-condition.patch
queue-4.19/wifi-iwlwifi-dvm-fix-memcpy-detected-field-spanning-.patch
queue-4.19/power-supply-bq27xxx-fix-poll_interval-handling-and-races-on-remove.patch
