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| author | Rafael J. Wysocki <rjw@sisk.pl> | 2009-04-18 11:45:13 (GMT) |
|---|---|---|
| committer | Rafael J. Wysocki <rjw@sisk.pl> | 2009-06-12 19:32:29 (GMT) |
| commit | 62b0124761b9c2e304ee07dcf4db46c4a3dfec11 (patch) | |
| tree | 81f27bb0e7eb92cd2d14a3ae3088ef3fa90a3cc2 /drivers | |
| parent | ce4b3c55475e451cb489e857640396c37ca88974 (diff) | |
| download | linux-62b0124761b9c2e304ee07dcf4db46c4a3dfec11.tar.xz | |
PM: Warn if interrupts are enabled during suspend-resume of sysdevs
Sysdevs have to be suspended and resumed with interrupts disabled and
things usually break in a way that's difficult to debug if one of
sysdev drivers enables interrupts by mistake during suspend or
resume. Add extra checks that will generate warnings in such cases.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/base/sys.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/base/sys.c b/drivers/base/sys.c index 3236b43..9742a78 100644 --- a/drivers/base/sys.c +++ b/drivers/base/sys.c @@ -343,11 +343,15 @@ static void __sysdev_resume(struct sys_device *dev) /* First, call the class-specific one */ if (cls->resume) cls->resume(dev); + WARN_ONCE(!irqs_disabled(), + "Interrupts enabled after %pF\n", cls->resume); /* Call auxillary drivers next. */ list_for_each_entry(drv, &cls->drivers, entry) { if (drv->resume) drv->resume(dev); + WARN_ONCE(!irqs_disabled(), + "Interrupts enabled after %pF\n", drv->resume); } } @@ -377,6 +381,9 @@ int sysdev_suspend(pm_message_t state) if (ret) return ret; + WARN_ONCE(!irqs_disabled(), + "Interrupts enabled while suspending system devices\n"); + pr_debug("Suspending System Devices\n"); list_for_each_entry_reverse(cls, &system_kset->list, kset.kobj.entry) { @@ -393,6 +400,9 @@ int sysdev_suspend(pm_message_t state) if (ret) goto aux_driver; } + WARN_ONCE(!irqs_disabled(), + "Interrupts enabled after %pF\n", + drv->suspend); } /* Now call the generic one */ @@ -400,6 +410,9 @@ int sysdev_suspend(pm_message_t state) ret = cls->suspend(sysdev, state); if (ret) goto cls_driver; + WARN_ONCE(!irqs_disabled(), + "Interrupts enabled after %pF\n", + cls->suspend); } } } @@ -452,6 +465,9 @@ int sysdev_resume(void) { struct sysdev_class *cls; + WARN_ONCE(!irqs_disabled(), + "Interrupts enabled while resuming system devices\n"); + pr_debug("Resuming System Devices\n"); list_for_each_entry(cls, &system_kset->list, kset.kobj.entry) { |