3.19.8-ckt4 -stable review patch. If anyone has any objections, please let me
know.
------------------
From: Stefan Agner <ste...@agner.ch>
commit 119434f44c78df8c4b6d67f835448542a4bd7e91 upstream.
When entering suspend while an wakeup alarm is set, enable_set_wake
should make sure that the RTC interrupt keep being enabled and the
.irq_set_wake for the RTC interrupt get called. However, since the
driver uses the suspend_noirq callback, the call to enable_irq_wake
has been made after disabling the interrupts. While .irq_set_wake
has been called properly, the interrupt remained disabled.
Use the suspend callback to call enable_irq_wake early enough to
ensure the RTC interrupt remains enabled.
Fixes: 7654e9d4fd8f ("drivers/rtc/rtc-snvs: fix suspend/resume")
Signed-off-by: Stefan Agner <ste...@agner.ch>
Signed-off-by: Alexandre Belloni <alexandre.bell...@free-electrons.com>
Signed-off-by: Kamal Mostafa <ka...@canonical.com>
---
drivers/rtc/rtc-snvs.c | 30 +++++++++++++++++++++---------
1 file changed, 21 insertions(+), 9 deletions(-)
diff --git a/drivers/rtc/rtc-snvs.c b/drivers/rtc/rtc-snvs.c
index 0479e80..d87a85c 100644
--- a/drivers/rtc/rtc-snvs.c
+++ b/drivers/rtc/rtc-snvs.c
@@ -322,6 +322,13 @@ static int snvs_rtc_suspend(struct device *dev)
if (device_may_wakeup(dev))
enable_irq_wake(data->irq);
+ return 0;
+}
+
+static int snvs_rtc_suspend_noirq(struct device *dev)
+{
+ struct snvs_rtc_data *data = dev_get_drvdata(dev);
+
if (data->clk)
clk_disable_unprepare(data->clk);
@@ -331,23 +338,28 @@ static int snvs_rtc_suspend(struct device *dev)
static int snvs_rtc_resume(struct device *dev)
{
struct snvs_rtc_data *data = dev_get_drvdata(dev);
- int ret;
if (device_may_wakeup(dev))
- disable_irq_wake(data->irq);
+ return disable_irq_wake(data->irq);
- if (data->clk) {
- ret = clk_prepare_enable(data->clk);
- if (ret)
- return ret;
- }
+ return 0;
+}
+
+static int snvs_rtc_resume_noirq(struct device *dev)
+{
+ struct snvs_rtc_data *data = dev_get_drvdata(dev);
+
+ if (data->clk)
+ return clk_prepare_enable(data->clk);
return 0;
}
static const struct dev_pm_ops snvs_rtc_pm_ops = {
- .suspend_noirq = snvs_rtc_suspend,
- .resume_noirq = snvs_rtc_resume,
+ .suspend = snvs_rtc_suspend,
+ .suspend_noirq = snvs_rtc_suspend_noirq,
+ .resume = snvs_rtc_resume,
+ .resume_noirq = snvs_rtc_resume_noirq,
};
#define SNVS_RTC_PM_OPS (&snvs_rtc_pm_ops)
--
1.9.1
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