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authorSanchayan Maity <maitysanchayan@gmail.com>2014-12-10 15:54:20 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2014-12-10 17:41:16 -0800
commit7654e9d4fd8f160b3736b297c4b35684988c8c62 (patch)
tree90b327d572fa7d39fb13ccc01a06da532dbcc358 /drivers/rtc
parent7f899399541060a2888cd99ec9f15abd643b4c54 (diff)
downloadlinux-7654e9d4fd8f160b3736b297c4b35684988c8c62.tar.bz2
drivers/rtc/rtc-snvs: fix suspend/resume
The alarm interrupt handler also reads registers which are part of SNVS and need clocks enabled. However, the resume function is called after IRQ's have been enabled, hence this leads to a abort: Unhandled fault: external abort on non-linefetch (0x1008) at 0x908c604c Internal error: : 1008 [#1] ARM Modules linked in: CPU: 0 PID: 421 Comm: sh Not tainted 3.18.0-rc5-00135-g0689c67-dirty #1592 task: 8e03e800 ti: 8cad8000 task.ti: 8cad8000 PC is at snvs_rtc_irq_handler+0x14/0x74 LR is at handle_irq_event_percpu+0x3c/0x144 Fix this by using the .{suspend/resume}_noirq callbacks instead of .{suspend/resume} . Signed-off-by: Sanchayan Maity <maitysanchayan@gmail.com> Cc: Shawn Guo <shawn.guo@linaro.org> Cc: Stefan Agner <stefan@agner.ch> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/rtc')
-rw-r--r--drivers/rtc/rtc-snvs.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/rtc/rtc-snvs.c b/drivers/rtc/rtc-snvs.c
index d4a651268174..2cd8ffe5c698 100644
--- a/drivers/rtc/rtc-snvs.c
+++ b/drivers/rtc/rtc-snvs.c
@@ -346,7 +346,10 @@ static int snvs_rtc_resume(struct device *dev)
}
#endif
-static SIMPLE_DEV_PM_OPS(snvs_rtc_pm_ops, snvs_rtc_suspend, snvs_rtc_resume);
+static const struct dev_pm_ops snvs_rtc_pm_ops = {
+ .suspend_noirq = snvs_rtc_suspend,
+ .resume_noirq = snvs_rtc_resume,
+};
static const struct of_device_id snvs_dt_ids[] = {
{ .compatible = "fsl,sec-v4.0-mon-rtc-lp", },