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path: root/drivers/scsi/ufs/ufs-sysfs.c
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Diffstat (limited to 'drivers/scsi/ufs/ufs-sysfs.c')
-rw-r--r--drivers/scsi/ufs/ufs-sysfs.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/scsi/ufs/ufs-sysfs.c b/drivers/scsi/ufs/ufs-sysfs.c
index bdcd27faa054..08e72b7eef6a 100644
--- a/drivers/scsi/ufs/ufs-sysfs.c
+++ b/drivers/scsi/ufs/ufs-sysfs.c
@@ -28,6 +28,7 @@ static const char *ufschd_ufs_dev_pwr_mode_to_string(
case UFS_ACTIVE_PWR_MODE: return "ACTIVE";
case UFS_SLEEP_PWR_MODE: return "SLEEP";
case UFS_POWERDOWN_PWR_MODE: return "POWERDOWN";
+ case UFS_DEEPSLEEP_PWR_MODE: return "DEEPSLEEP";
default: return "UNKNOWN";
}
}
@@ -38,6 +39,7 @@ static inline ssize_t ufs_sysfs_pm_lvl_store(struct device *dev,
bool rpm)
{
struct ufs_hba *hba = dev_get_drvdata(dev);
+ struct ufs_dev_info *dev_info = &hba->dev_info;
unsigned long flags, value;
if (kstrtoul(buf, 0, &value))
@@ -46,6 +48,11 @@ static inline ssize_t ufs_sysfs_pm_lvl_store(struct device *dev,
if (value >= UFS_PM_LVL_MAX)
return -EINVAL;
+ if (ufs_pm_lvl_states[value].dev_state == UFS_DEEPSLEEP_PWR_MODE &&
+ (!(hba->caps & UFSHCD_CAP_DEEPSLEEP) ||
+ !(dev_info->wspecversion >= 0x310)))
+ return -EINVAL;
+
spin_lock_irqsave(hba->host->host_lock, flags);
if (rpm)
hba->rpm_lvl = value;