The interrupt handler got enabled very early. If the interrupt cause is triggering immediately before the context is fully prepared. This can lead to undefined behaviour. Therefor we move the interrupt enable code to the end of the probe function.
Signed-off-by: Michael Grzeschik <[email protected]> Signed-off-by: Denis Osterland <[email protected]> --- drivers/rtc/rtc-isl1208.c | 34 +++++++++++++++++----------------- 1 file changed, 17 insertions(+), 17 deletions(-) diff --git a/drivers/rtc/rtc-isl1208.c b/drivers/rtc/rtc-isl1208.c index c8b4953482296..a13a4ba79004d 100644 --- a/drivers/rtc/rtc-isl1208.c +++ b/drivers/rtc/rtc-isl1208.c @@ -635,23 +635,6 @@ isl1208_probe(struct i2c_client *client, const struct i2c_device_id *id) if (isl1208_i2c_validate_client(client) < 0) return -ENODEV; - if (client->irq > 0) { - rc = devm_request_threaded_irq(&client->dev, client->irq, NULL, - isl1208_rtc_interrupt, - IRQF_SHARED | IRQF_ONESHOT, - isl1208_driver.driver.name, - client); - if (!rc) { - device_init_wakeup(&client->dev, 1); - enable_irq_wake(client->irq); - } else { - dev_err(&client->dev, - "Unable to request irq %d, no alarm support\n", - client->irq); - client->irq = 0; - } - } - rtc = devm_rtc_device_register(&client->dev, isl1208_driver.driver.name, &isl1208_rtc_ops, THIS_MODULE); @@ -674,6 +657,23 @@ isl1208_probe(struct i2c_client *client, const struct i2c_device_id *id) if (rc) return rc; + if (client->irq > 0) { + rc = devm_request_threaded_irq(&client->dev, client->irq, NULL, + isl1208_rtc_interrupt, + IRQF_SHARED | IRQF_ONESHOT, + isl1208_driver.driver.name, + client); + if (!rc) { + device_init_wakeup(&client->dev, 1); + enable_irq_wake(client->irq); + } else { + dev_err(&client->dev, + "Unable to request irq %d, no alarm support\n", + client->irq); + client->irq = 0; + } + } + return 0; } -- 2.11.0
