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[v4,2/7] scsi: pm: add interface to autosuspend scsi device

Message ID 1343379650-2867-3-git-send-email-aaron.lu@amd.com
State Not Applicable
Delegated to: David Miller
Headers show

Commit Message

Aaron Lu July 27, 2012, 9 a.m. UTC 
Add a new interface scsi_autopm_put_device_autosuspend to mark
last busy for the device and then put autosuspend the device.

Signed-off-by: Aaron Lu <aaron.lu@amd.com>
---
 drivers/scsi/scsi_pm.c     | 7 +++++++
 include/scsi/scsi_device.h | 2 ++
 2 files changed, 9 insertions(+)
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Patch

diff --git a/drivers/scsi/scsi_pm.c b/drivers/scsi/scsi_pm.c
index dc0ad85..83edb93 100644
--- a/drivers/scsi/scsi_pm.c
+++ b/drivers/scsi/scsi_pm.c
@@ -201,6 +201,13 @@  void scsi_autopm_put_device(struct scsi_device *sdev)
 }
 EXPORT_SYMBOL_GPL(scsi_autopm_put_device);
 
+void scsi_autopm_put_device_autosuspend(struct scsi_device *sdev)
+{
+	pm_runtime_mark_last_busy(&sdev->sdev_gendev);
+	pm_runtime_put_autosuspend(&sdev->sdev_gendev);
+}
+EXPORT_SYMBOL_GPL(scsi_autopm_put_device_autosuspend);
+
 void scsi_autopm_get_target(struct scsi_target *starget)
 {
 	pm_runtime_get_sync(&starget->dev);
diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h
index 9895f69..3636146 100644
--- a/include/scsi/scsi_device.h
+++ b/include/scsi/scsi_device.h
@@ -395,9 +395,11 @@  extern int scsi_execute_req(struct scsi_device *sdev, const unsigned char *cmd,
 #ifdef CONFIG_PM_RUNTIME
 extern int scsi_autopm_get_device(struct scsi_device *);
 extern void scsi_autopm_put_device(struct scsi_device *);
+extern void scsi_autopm_put_device_autosuspend(struct scsi_device *);
 #else
 static inline int scsi_autopm_get_device(struct scsi_device *d) { return 0; }
 static inline void scsi_autopm_put_device(struct scsi_device *d) {}
+static inline void scsi_autopm_put_device_autosuspend(struct scsi_device *d) {}
 #endif /* CONFIG_PM_RUNTIME */
 
 static inline int __must_check scsi_device_reprobe(struct scsi_device *sdev)