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authorAaron Lu <aaron.lu@amd.com>2012-05-15 10:43:00 +0400
committerJames Bottomley <JBottomley@Parallels.com>2012-05-22 14:09:50 +0400
commitd20ec597cba1e8ea407c9a7c668a9e04fc057c83 (patch)
tree8b4807a70dbeaca14a882ef96bc0410bcf1f464f /drivers/scsi/scsi_pm.c
parent6192bd7cdc37e2df9391403235b72668a5bf27da (diff)
downloadlinux-d20ec597cba1e8ea407c9a7c668a9e04fc057c83.tar.xz
[SCSI] scsi_pm: resume device if suspend failed
For scsi devices which use scsi bus runtime callback, runtime suspend will call scsi_dev_type_suspend, and if the drv->suspend failed, the device will still be in active state. But since scsi_device_quiesce is called, the device will not be able to respond any more commands. So add a check here to see if err occured, if so, bring the device back to normal state with scsi_device_resume. Signed-off-by: Aaron Lu <aaron.lu@amd.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi/scsi_pm.c')
-rw-r--r--drivers/scsi/scsi_pm.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/scsi/scsi_pm.c b/drivers/scsi/scsi_pm.c
index f661a41fa4c6..d4201ded3b22 100644
--- a/drivers/scsi/scsi_pm.c
+++ b/drivers/scsi/scsi_pm.c
@@ -24,8 +24,11 @@ static int scsi_dev_type_suspend(struct device *dev, pm_message_t msg)
err = scsi_device_quiesce(to_scsi_device(dev));
if (err == 0) {
drv = dev->driver;
- if (drv && drv->suspend)
+ if (drv && drv->suspend) {
err = drv->suspend(dev, msg);
+ if (err)
+ scsi_device_resume(to_scsi_device(dev));
+ }
}
dev_dbg(dev, "scsi suspend: %d\n", err);
return err;