Commit 1e82e462 authored by Xiang Chen's avatar Xiang Chen Committed by Martin K. Petersen
Browse files

scsi: libsas: Resume SAS host for phy reset or enable via sysfs 

Currently if a phy reset or enable phy is issued via sysfs when controller
is suspended, those operations will be ignored as SAS_HA_REGISTERED is
cleared. If RPM is enabled then we may aggressively suspend automatically.
In this case it may be difficult to enable or reset a phy via sysfs, so
resume the host in these scenarios.

Link: https://lore.kernel.org/r/1657823002-139010-6-git-send-email-john.garry@huawei.com


Signed-off-by: default avatarXiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: default avatarJohn Garry <john.garry@huawei.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 7e15334f

drivers/scsi/libsas/sas_init.c

+4 −0
Original line number Diff line number Diff line
@@ -531,6 +531,7 @@ static int queue_phy_reset(struct sas_phy *phy, int hard_reset) 
	if (!d)

		return -ENOMEM;



	pm_runtime_get_sync(ha->dev);

	/* libsas workqueue coordinates ata-eh reset with discovery */

	mutex_lock(&d->event_lock);

	d->reset_result = 0;
@@ -544,6 +545,7 @@ static int queue_phy_reset(struct sas_phy *phy, int hard_reset) 
	if (rc == 0)

		rc = d->reset_result;

	mutex_unlock(&d->event_lock);

	pm_runtime_put_sync(ha->dev);



	return rc;

}
@@ -558,6 +560,7 @@ static int queue_phy_enable(struct sas_phy *phy, int enable) 
	if (!d)

		return -ENOMEM;



	pm_runtime_get_sync(ha->dev);

	/* libsas workqueue coordinates ata-eh reset with discovery */

	mutex_lock(&d->event_lock);

	d->enable_result = 0;
@@ -571,6 +574,7 @@ static int queue_phy_enable(struct sas_phy *phy, int enable) 
	if (rc == 0)

		rc = d->enable_result;

	mutex_unlock(&d->event_lock);

	pm_runtime_put_sync(ha->dev);



	return rc;

}