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authorRafael J. Wysocki <rjw@sisk.pl>2008-01-12 19:40:46 (GMT)
committerGreg Kroah-Hartman <gregkh@suse.de>2008-01-25 04:40:04 (GMT)
commit775b64d2b6ca37697de925f70799c710aab5849a (patch)
tree09e91c89228c8d3c6928a1b2ef56711190c69836 /include
parent7a83d456a86d559a6347115d206d23774bc152d9 (diff)
downloadlinux-775b64d2b6ca37697de925f70799c710aab5849a.tar.xz
PM: Acquire device locks on suspend
This patch reorganizes the way suspend and resume notifications are sent to drivers. The major changes are that now the PM core acquires every device semaphore before calling the methods, and calls to device_add() during suspends will fail, while calls to device_del() during suspends will block. It also provides a way to safely remove a suspended device with the help of the PM core, by using the device_pm_schedule_removal() callback introduced specifically for this purpose, and updates two drivers (msr and cpuid) that need to use it. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'include')
-rw-r--r--include/linux/device.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/device.h b/include/linux/device.h
index 2e15822..cf4ae5c 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -521,6 +521,14 @@ extern struct device *device_create(struct class *cls, struct device *parent,
dev_t devt, const char *fmt, ...)
__attribute__((format(printf,4,5)));
extern void device_destroy(struct class *cls, dev_t devt);
+#ifdef CONFIG_PM_SLEEP
+extern void destroy_suspended_device(struct class *cls, dev_t devt);
+#else /* !CONFIG_PM_SLEEP */
+static inline void destroy_suspended_device(struct class *cls, dev_t devt)
+{
+ device_destroy(cls, devt);
+}
+#endif /* !CONFIG_PM_SLEEP */
/*
* Platform "fixup" functions - allow the platform to have their say