rtc: cmos: Fix wake alarm breakage

Commit 4919d3eb2ec0 ("rtc: cmos: Fix event handler registration
ordering issue") overlooked the fact that cmos_do_probe() depended
on the preparations carried out by cmos_wake_setup() and the wake
alarm stopped working after the ordering of them had been changed.

Address this by partially reverting commit 4919d3eb2ec0 so that
cmos_wake_setup() is called before cmos_do_probe() again and moving
the rtc_wake_setup() invocation from cmos_wake_setup() directly to the
callers of cmos_do_probe() where it will happen after a successful
completion of the latter.

Fixes: 4919d3eb2ec0 ("rtc: cmos: Fix event handler registration ordering issue")
Reported-by: Zhang Rui <rui.zhang@intel.com>
Reported-by: Todd Brandt <todd.e.brandt@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://lore.kernel.org/r/5887691.lOV4Wx5bFT@kreacher
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

diff --git a/drivers/rtc/rtc-cmos.c b/drivers/rtc/rtc-cmos.c
index 610413b..01fb31f 100644 (file)
--- a/drivers/rtc/rtc-cmos.c
+++ b/drivers/rtc/rtc-cmos.c
@@ -1233,6 +1233,9 @@ static u32 rtc_handler(void *context)
 
 static inline void rtc_wake_setup(struct device *dev)
 {
+       if (acpi_disabled)
+               return;
+
        acpi_install_fixed_event_handler(ACPI_EVENT_RTC, rtc_handler, dev);
        /*
         * After the RTC handler is installed, the Fixed_RTC event should
@@ -1286,7 +1289,6 @@ static void cmos_wake_setup(struct device *dev)
 
        use_acpi_alarm_quirks();
 
-       rtc_wake_setup(dev);
        acpi_rtc_info.wake_on = rtc_wake_on;
        acpi_rtc_info.wake_off = rtc_wake_off;
 
@@ -1354,6 +1356,8 @@ static int cmos_pnp_probe(struct pnp_dev *pnp, const struct pnp_device_id *id)
 {
        int irq, ret;
 
+       cmos_wake_setup(&pnp->dev);
+
        if (pnp_port_start(pnp, 0) == 0x70 && !pnp_irq_valid(pnp, 0)) {
                irq = 0;
 #ifdef CONFIG_X86
@@ -1372,7 +1376,7 @@ static int cmos_pnp_probe(struct pnp_dev *pnp, const struct pnp_device_id *id)
        if (ret)
                return ret;
 
-       cmos_wake_setup(&pnp->dev);
+       rtc_wake_setup(&pnp->dev);
 
        return 0;
 }
@@ -1461,6 +1465,7 @@ static int __init cmos_platform_probe(struct platform_device *pdev)
        int irq, ret;
 
        cmos_of_init(pdev);
+       cmos_wake_setup(&pdev->dev);
 
        if (RTC_IOMAPPED)
                resource = platform_get_resource(pdev, IORESOURCE_IO, 0);
@@ -1474,7 +1479,7 @@ static int __init cmos_platform_probe(struct platform_device *pdev)
        if (ret)
                return ret;
 
-       cmos_wake_setup(&pdev->dev);
+       rtc_wake_setup(&pdev->dev);
 
        return 0;
 }