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

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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: Xiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Xiang Chen 2022-07-15 02:23:22 +08:00 committed by Martin K. Petersen
parent 7e15334f5d
commit 1e82e4627a
1 changed files with 4 additions and 0 deletions
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4
drivers/scsi/libsas/sas_init.c
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@ -531,6 +531,7 @@ static int queue_phy_reset(struct sas_phy *phy, int hard_reset)
if (!d) if (!d)
return -ENOMEM; return -ENOMEM;
pm_runtime_get_sync(ha->dev);
/* libsas workqueue coordinates ata-eh reset with discovery */ /* libsas workqueue coordinates ata-eh reset with discovery */
mutex_lock(&d->event_lock); mutex_lock(&d->event_lock);
d->reset_result = 0; d->reset_result = 0;
@ -544,6 +545,7 @@ static int queue_phy_reset(struct sas_phy *phy, int hard_reset)
if (rc == 0) if (rc == 0)
rc = d->reset_result; rc = d->reset_result;
mutex_unlock(&d->event_lock); mutex_unlock(&d->event_lock);
pm_runtime_put_sync(ha->dev);
return rc; return rc;
} }
@ -558,6 +560,7 @@ static int queue_phy_enable(struct sas_phy *phy, int enable)
if (!d) if (!d)
return -ENOMEM; return -ENOMEM;
pm_runtime_get_sync(ha->dev);
/* libsas workqueue coordinates ata-eh reset with discovery */ /* libsas workqueue coordinates ata-eh reset with discovery */
mutex_lock(&d->event_lock); mutex_lock(&d->event_lock);
d->enable_result = 0; d->enable_result = 0;
@ -571,6 +574,7 @@ static int queue_phy_enable(struct sas_phy *phy, int enable)
if (rc == 0) if (rc == 0)
rc = d->enable_result; rc = d->enable_result;
mutex_unlock(&d->event_lock); mutex_unlock(&d->event_lock);
pm_runtime_put_sync(ha->dev);
return rc; return rc;
} }