Commit c4b03cd4 authored by Paul Fox's avatar Paul Fox Committed by Greg Kroah-Hartman

rtc-cmos: fix suspend/resume

commit 2fb08e6c upstream.

rtc-cmos was setting suspend/resume hooks at the device_driver level.
However, the platform bus code (drivers/base/platform.c) only looks for
resume hooks at the dev_pm_ops level, or within the platform_driver.

Switch rtc_cmos to use dev_pm_ops so that suspend/resume code is executed
again.

Paul said:

: The user visible symptom in our (XO laptop) case was that rtcwake would
: fail to wake the laptop.  The RTC alarm would expire, but the wakeup
: wasn't unmasked.
:
: As for severity, the impact may have been reduced because if I recall
: correctly, the bug only affected platforms with CONFIG_PNP disabled.
Signed-off-by: default avatarPaul Fox <pgf@laptop.org>
Signed-off-by: default avatarDaniel Drake <dsd@laptop.org>
Acked-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent d7839719
......@@ -36,6 +36,7 @@
#include <linux/platform_device.h>
#include <linux/mod_devicetable.h>
#include <linux/log2.h>
#include <linux/pm.h>
/* this is for "generic access to PC-style RTC" using CMOS_READ/CMOS_WRITE */
#include <asm-generic/rtc.h>
......@@ -850,7 +851,7 @@ static void __exit cmos_do_remove(struct device *dev)
#ifdef CONFIG_PM
static int cmos_suspend(struct device *dev, pm_message_t mesg)
static int cmos_suspend(struct device *dev)
{
struct cmos_rtc *cmos = dev_get_drvdata(dev);
unsigned char tmp;
......@@ -898,7 +899,7 @@ static int cmos_suspend(struct device *dev, pm_message_t mesg)
*/
static inline int cmos_poweroff(struct device *dev)
{
return cmos_suspend(dev, PMSG_HIBERNATE);
return cmos_suspend(dev);
}
static int cmos_resume(struct device *dev)
......@@ -945,9 +946,9 @@ static int cmos_resume(struct device *dev)
return 0;
}
static SIMPLE_DEV_PM_OPS(cmos_pm_ops, cmos_suspend, cmos_resume);
#else
#define cmos_suspend NULL
#define cmos_resume NULL
static inline int cmos_poweroff(struct device *dev)
{
......@@ -1077,7 +1078,7 @@ static void __exit cmos_pnp_remove(struct pnp_dev *pnp)
static int cmos_pnp_suspend(struct pnp_dev *pnp, pm_message_t mesg)
{
return cmos_suspend(&pnp->dev, mesg);
return cmos_suspend(&pnp->dev);
}
static int cmos_pnp_resume(struct pnp_dev *pnp)
......@@ -1157,8 +1158,9 @@ static struct platform_driver cmos_platform_driver = {
.shutdown = cmos_platform_shutdown,
.driver = {
.name = (char *) driver_name,
.suspend = cmos_suspend,
.resume = cmos_resume,
#ifdef CONFIG_PM
.pm = &cmos_pm_ops,
#endif
}
};
......
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