Driver core: add suspend() and resume() to struct device_type

Driver core: add suspend() and resume() to struct device_type

In cases when there are devices of different types in the same class
we can't use class's implementation of suspend and resume methods and
we need to add them to struct device_type instead.

Also fix error handling in resume code (we should not try to call
class's resume method iof bus's resume method for the device failed.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 12 insertions, 1 deletions

diff --git a/drivers/base/power/resume.c b/drivers/base/power/resume.c
index 020be36705a6..a2c64188d713 100644
--- a/drivers/base/power/resume.c
+++ b/drivers/base/power/resume.c
@@ -26,7 +26,9 @@ int resume_device(struct device * dev)
 
         TRACE_DEVICE(dev);
         TRACE_RESUME(0);
+
         down(&dev->sem);
+
         if (dev->power.pm_parent
                         && dev->power.pm_parent->power.power_state.event) {
                 dev_err(dev, "PM: resume from %d, parent %s still %d\n",
@@ -34,15 +36,24 @@ int resume_device(struct device * dev)
                         dev->power.pm_parent->bus_id,
                         dev->power.pm_parent->power.power_state.event);
         }
+
         if (dev->bus && dev->bus->resume) {
                 dev_dbg(dev,"resuming\n");
                 error = dev->bus->resume(dev);
         }
-        if (dev->class && dev->class->resume) {
+
+        if (!error && dev->type && dev->type->resume) {
+                dev_dbg(dev,"resuming\n");
+                error = dev->type->resume(dev);
+        }
+
+        if (!error && dev->class && dev->class->resume) {
                 dev_dbg(dev,"class resume\n");
                 error = dev->class->resume(dev);
         }
+
         up(&dev->sem);
+
         TRACE_RESUME(error);
         return error;
 }