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Subject[PATCH v4 2/7] scsi: pm: add interface to autosuspend scsi device
Date
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(+)

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)
--
1.7.11.3



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