On Monday 22 December 2014 16:50:37 Gabriele Mazzotta wrote:
> On Monday 22 December 2014 14:59:49 Matthew Garrett wrote:
> > Can you try this diff?
> 
> Unfortunately it doesn't work (I made a change, see here below).

I take a better look at the code and noticed a couple of mistakes in
your, but you nailed it.

Here below the working patch. There was an extra ! and another deadlock.

diff --git a/drivers/rtc/rtc-cmos.c b/drivers/rtc/rtc-cmos.c
index 5b2e761..4035927 100644
--- a/drivers/rtc/rtc-cmos.c
+++ b/drivers/rtc/rtc-cmos.c
@@ -48,6 +48,7 @@ struct cmos_rtc {
        struct device           *dev;
        int                     irq;
        struct resource         *iomem;
+       struct rtc_wkalrm       alm;
 
        void                    (*wake_on)(struct device *);
        void                    (*wake_off)(struct device *);
@@ -59,6 +60,8 @@ struct cmos_rtc {
        u8                      day_alrm;
        u8                      mon_alrm;
        u8                      century;
+
+       bool                    valid_alarm;
 };
 
 /* both platform and pnp busses use negative numbers for invalid irqs */
@@ -881,6 +884,8 @@ static int cmos_suspend(struct device *dev)
        }
        spin_unlock_irq(&rtc_lock);
 
+       cmos->valid_alarm = !cmos_read_alarm(dev, &cmos->alm);
+
        if (tmp & RTC_AIE) {
                cmos->enabled_wake = 1;
                if (cmos->wake_on)
@@ -951,6 +956,9 @@ static int cmos_resume(struct device *dev)
        }
        spin_unlock_irq(&rtc_lock);
 
+       if (cmos->valid_alarm)
+               cmos_set_alarm(dev, &cmos->alm);
+
        dev_dbg(dev, "resume, ctrl %02x\n", tmp);
 
        return 0;

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