[PATCH] DRIVER MODEL: Get rid of the obsolete tri-level suspend/resume callbacks

In PM v1, all devices were called at SUSPEND_DISABLE level.  Then
all devices were called at SUSPEND_SAVE_STATE level, and finally
SUSPEND_POWER_DOWN level.  However, with PM v2, to maintain
compatibility for platform devices, I arranged for the PM v2
suspend/resume callbacks to call the old PM v1 suspend/resume
callbacks three times with each level in order so that existing
drivers continued to work.

Since this is obsolete infrastructure which is no longer necessary,
we can remove it.  Here's an (untested) patch to do exactly that.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 6 insertions, 14 deletions

diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index a1a56ff65b7..75ce8711bca 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -281,13 +281,9 @@ static int platform_suspend(struct device * dev, pm_message_t state)
 {
         int ret = 0;
 
-        if (dev->driver && dev->driver->suspend) {
-                ret = dev->driver->suspend(dev, state, SUSPEND_DISABLE);
-                if (ret == 0)
-                        ret = dev->driver->suspend(dev, state, SUSPEND_SAVE_STATE);
-                if (ret == 0)
-                        ret = dev->driver->suspend(dev, state, SUSPEND_POWER_DOWN);
-        }
+        if (dev->driver && dev->driver->suspend)
+                ret = dev->driver->suspend(dev, state);
+
         return ret;
 }
 
@@ -295,13 +291,9 @@ static int platform_resume(struct device * dev)
 {
         int ret = 0;
 
-        if (dev->driver && dev->driver->resume) {
-                ret = dev->driver->resume(dev, RESUME_POWER_ON);
-                if (ret == 0)
-                        ret = dev->driver->resume(dev, RESUME_RESTORE_STATE);
-                if (ret == 0)
-                        ret = dev->driver->resume(dev, RESUME_ENABLE);
-        }
+        if (dev->driver && dev->driver->resume)
+                ret = dev->driver->resume(dev);
+
         return ret;
 }