[PATCH v1 1/2] scsi: ufs: support vops pre suspend

[peter.wang at mediatek.com]

From: Peter Wang <peter.wang at mediatek.com>

This patch introduce an solution to do pre suspned before SSU
(sleep) command.

Signed-off-by: Peter Wang <peter.wang at mediatek.com>
---
 drivers/scsi/ufs/ufshcd.c | 9 +++++++--
 drivers/scsi/ufs/ufshcd.h | 8 +++++---
 2 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 188de6f91050..73eb626fa88f 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -8897,6 +8897,10 @@ static int __ufshcd_wl_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op)
 
 	flush_work(&hba->eeh_work);
 
+	ret = ufshcd_vops_suspend(hba, pm_op, PRE_CHANGE);
+	if (ret)
+		goto enable_scaling;
+
 	if (req_dev_pwr_mode != hba->curr_dev_pwr_mode) {
 		if (pm_op != UFS_RUNTIME_PM)
 			/* ensure that bkops is disabled */
@@ -8924,7 +8928,7 @@ static int __ufshcd_wl_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op)
 	 * vendor specific host controller register space call them before the
 	 * host clocks are ON.
 	 */
-	ret = ufshcd_vops_suspend(hba, pm_op);
+	ret = ufshcd_vops_suspend(hba, pm_op, POST_CHANGE);
 	if (ret)
 		goto set_link_active;
 	goto out;
@@ -9052,7 +9056,8 @@ static int __ufshcd_wl_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op)
 set_old_link_state:
 	ufshcd_link_state_transition(hba, old_link_state, 0);
 vendor_suspend:
-	ufshcd_vops_suspend(hba, pm_op);
+	ufshcd_vops_suspend(hba, pm_op, PRE_CHANGE);
+	ufshcd_vops_suspend(hba, pm_op, POST_CHANGE);
 out:
 	if (ret)
 		ufshcd_update_evt_hist(hba, UFS_EVT_WL_RES_ERR, (u32)ret);
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index f0da5d3db1fa..e90320253d96 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -344,7 +344,8 @@ struct ufs_hba_variant_ops {
 					enum ufs_notify_change_status);
 	int	(*apply_dev_quirks)(struct ufs_hba *hba);
 	void	(*fixup_dev_quirks)(struct ufs_hba *hba);
-	int     (*suspend)(struct ufs_hba *, enum ufs_pm_op);
+	int     (*suspend)(struct ufs_hba *, enum ufs_pm_op,
+					enum ufs_notify_change_status);
 	int     (*resume)(struct ufs_hba *, enum ufs_pm_op);
 	void	(*dbg_register_dump)(struct ufs_hba *hba);
 	int	(*phy_initialization)(struct ufs_hba *);
@@ -1300,10 +1301,11 @@ static inline void ufshcd_vops_fixup_dev_quirks(struct ufs_hba *hba)
 		hba->vops->fixup_dev_quirks(hba);
 }
 
-static inline int ufshcd_vops_suspend(struct ufs_hba *hba, enum ufs_pm_op op)
+static inline int ufshcd_vops_suspend(struct ufs_hba *hba, enum ufs_pm_op op,
+				enum ufs_notify_change_status status)
 {
 	if (hba->vops && hba->vops->suspend)
-		return hba->vops->suspend(hba, op);
+		return hba->vops->suspend(hba, op, status);
 
 	return 0;
 }
-- 
2.18.0