PM: Clear -EAGAIN in dpm_prepare

When the last device in the dpm list is unregistered directly after its
prepare() callback returned with -EAGAIN, the return code is passed to
the calling function, resulting in a suspend failure. Prevent this by
clearing the return code after -EAGAIN.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>

diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index fae7254..58a3e57 100644 (file)
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -762,6 +762,7 @@ static int dpm_prepare(pm_message_t state)
                        dev->power.status = DPM_ON;
                        if (error == -EAGAIN) {
                                put_device(dev);
+                               error = 0;
                                continue;
                        }
                        printk(KERN_ERR "PM: Failed to prepare device %s "