6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Mario Limonciello <mario.limonciello@xxxxxxx> commit 1311a8f0d4b23f58bbababa13623aa40b8ad4e0c upstream. When mc146818_avoid_UIP() fails to return a valid value, this is because UIP didn't clear in the timeout period. Adjust the return code in this case to -ETIMEDOUT. Tested-by: Mateusz Jończyk <mat.jonczyk@xxxxx> Reviewed-by: Mateusz Jończyk <mat.jonczyk@xxxxx> Acked-by: Mateusz Jończyk <mat.jonczyk@xxxxx> Cc: <stable@xxxxxxxxxxxxxxx> Fixes: cdedc45c579f ("rtc: cmos: avoid UIP when reading alarm time") Fixes: cd17420ebea5 ("rtc: cmos: avoid UIP when writing alarm time") Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx> Link: https://lore.kernel.org/r/20231128053653.101798-3-mario.limonciello@xxxxxxx Signed-off-by: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/rtc/rtc-cmos.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/rtc/rtc-cmos.c +++ b/drivers/rtc/rtc-cmos.c @@ -292,7 +292,7 @@ static int cmos_read_alarm(struct device /* This not only a rtc_op, but also called directly */ if (!is_valid_irq(cmos->irq)) - return -EIO; + return -ETIMEDOUT; /* Basic alarms only support hour, minute, and seconds fields. * Some also support day and month, for alarms up to a year in @@ -557,7 +557,7 @@ static int cmos_set_alarm(struct device * Use mc146818_avoid_UIP() to avoid this. */ if (!mc146818_avoid_UIP(cmos_set_alarm_callback, &p)) - return -EIO; + return -ETIMEDOUT; cmos->alarm_expires = rtc_tm_to_time64(&t->time);