This is a note to let you know that I've just added the patch titled rtc: cmos: Disable ACPI RTC event on removal to the 6.1-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: rtc-cmos-disable-acpi-rtc-event-on-removal.patch and it can be found in the queue-6.1 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit f351441eaf91fbe761b288c8ead417dd9d0a89d6 Author: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx> Date: Wed Nov 9 13:15:36 2022 +0100 rtc: cmos: Disable ACPI RTC event on removal [ Upstream commit 83ebb7b3036d151ee39a4a752018665648fc3bd4 ] Make cmos_do_remove() drop the ACPI RTC fixed event handler so as to prevent it from operating on stale data in case the event triggers after driver removal. Fixes: 311ee9c151ad ("rtc: cmos: allow using ACPI for RTC alarm instead of HPET") Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx> Reviewed-by: Zhang Rui <rui.zhang@xxxxxxxxx> Tested-by: Zhang Rui <rui.zhang@xxxxxxxxx> Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> Link: https://lore.kernel.org/r/2224609.iZASKD2KPV@kreacher Signed-off-by: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/rtc/rtc-cmos.c b/drivers/rtc/rtc-cmos.c index 039486bfedf4..00e2ca7374ec 100644 --- a/drivers/rtc/rtc-cmos.c +++ b/drivers/rtc/rtc-cmos.c @@ -798,6 +798,14 @@ static void acpi_rtc_event_setup(struct device *dev) acpi_disable_event(ACPI_EVENT_RTC, 0); } +static void acpi_rtc_event_cleanup(void) +{ + if (acpi_disabled) + return; + + acpi_remove_fixed_event_handler(ACPI_EVENT_RTC, rtc_handler); +} + static void rtc_wake_on(struct device *dev) { acpi_clear_event(ACPI_EVENT_RTC); @@ -884,6 +892,10 @@ static inline void acpi_rtc_event_setup(struct device *dev) { } +static inline void acpi_rtc_event_cleanup(void) +{ +} + static inline void acpi_cmos_wake_setup(struct device *dev) { } @@ -1138,6 +1150,9 @@ static void cmos_do_remove(struct device *dev) hpet_unregister_irq_handler(cmos_interrupt); } + if (!dev_get_platdata(dev)) + acpi_rtc_event_cleanup(); + cmos->rtc = NULL; ports = cmos->iomem;