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Subject[PATCH v3 5/5] Revert "scsi: ufs: disable vccq if it's not needed by UFS device"
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This reverts commit 60f0187031c05e04cbadffb62f557d0ff3564490.

Calling ufshcd_set_vccq_rail_unused hangs my system.
It seems vccq is not *not* needed.

Signed-off-by: Marc Gonzalez <marc.w.gonzalez@free.fr>
---
drivers/scsi/ufs/ufs.h | 1 -
drivers/scsi/ufs/ufshcd.c | 59 +++------------------------------------
2 files changed, 4 insertions(+), 56 deletions(-)

diff --git a/drivers/scsi/ufs/ufs.h b/drivers/scsi/ufs/ufs.h
index dd65fea07687..7da7318eb6a6 100644
--- a/drivers/scsi/ufs/ufs.h
+++ b/drivers/scsi/ufs/ufs.h
@@ -514,7 +514,6 @@ struct ufs_vreg {
struct regulator *reg;
const char *name;
bool enabled;
- bool unused;
int min_uV;
int max_uV;
int min_uA;
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 9ba7671b84f8..8b9a01073d62 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -245,7 +245,6 @@ static int ufshcd_probe_hba(struct ufs_hba *hba);
static int __ufshcd_setup_clocks(struct ufs_hba *hba, bool on,
bool skip_ref_clk);
static int ufshcd_setup_clocks(struct ufs_hba *hba, bool on);
-static int ufshcd_set_vccq_rail_unused(struct ufs_hba *hba, bool unused);
static int ufshcd_uic_hibern8_exit(struct ufs_hba *hba);
static int ufshcd_uic_hibern8_enter(struct ufs_hba *hba);
static inline void ufshcd_add_delay_before_dme_cmd(struct ufs_hba *hba);
@@ -6819,11 +6818,6 @@ static int ufshcd_probe_hba(struct ufs_hba *hba)
ufs_fixup_device_setup(hba, &card);
ufshcd_tune_unipro_params(hba);

- ret = ufshcd_set_vccq_rail_unused(hba,
- (hba->dev_quirks & UFS_DEVICE_NO_VCCQ) ? true : false);
- if (ret)
- goto out;
-
/* UFS device is also active now */
ufshcd_set_ufs_dev_active(hba);
ufshcd_force_reset_auto_bkops(hba);
@@ -7007,24 +7001,13 @@ static int ufshcd_config_vreg_load(struct device *dev, struct ufs_vreg *vreg,
static inline int ufshcd_config_vreg_lpm(struct ufs_hba *hba,
struct ufs_vreg *vreg)
{
- if (!vreg)
- return 0;
- else if (vreg->unused)
- return 0;
- else
- return ufshcd_config_vreg_load(hba->dev, vreg,
- UFS_VREG_LPM_LOAD_UA);
+ return ufshcd_config_vreg_load(hba->dev, vreg, UFS_VREG_LPM_LOAD_UA);
}

static inline int ufshcd_config_vreg_hpm(struct ufs_hba *hba,
struct ufs_vreg *vreg)
{
- if (!vreg)
- return 0;
- else if (vreg->unused)
- return 0;
- else
- return ufshcd_config_vreg_load(hba->dev, vreg, vreg->max_uA);
+ return ufshcd_config_vreg_load(hba->dev, vreg, vreg->max_uA);
}

static int ufshcd_config_vreg(struct device *dev,
@@ -7062,9 +7045,7 @@ static int ufshcd_enable_vreg(struct device *dev, struct ufs_vreg *vreg)
{
int ret = 0;

- if (!vreg)
- goto out;
- else if (vreg->enabled || vreg->unused)
+ if (!vreg || vreg->enabled)
goto out;

ret = ufshcd_config_vreg(dev, vreg, true);
@@ -7084,9 +7065,7 @@ static int ufshcd_disable_vreg(struct device *dev, struct ufs_vreg *vreg)
{
int ret = 0;

- if (!vreg)
- goto out;
- else if (!vreg->enabled || vreg->unused)
+ if (!vreg || !vreg->enabled)
goto out;

ret = regulator_disable(vreg->reg);
@@ -7192,36 +7171,6 @@ static int ufshcd_init_hba_vreg(struct ufs_hba *hba)
return 0;
}

-static int ufshcd_set_vccq_rail_unused(struct ufs_hba *hba, bool unused)
-{
- int ret = 0;
- struct ufs_vreg_info *info = &hba->vreg_info;
-
- if (!info)
- goto out;
- else if (!info->vccq)
- goto out;
-
- if (unused) {
- /* shut off the rail here */
- ret = ufshcd_toggle_vreg(hba->dev, info->vccq, false);
- /*
- * Mark this rail as no longer used, so it doesn't get enabled
- * later by mistake
- */
- if (!ret)
- info->vccq->unused = true;
- } else {
- /*
- * rail should have been already enabled hence just make sure
- * that unused flag is cleared.
- */
- info->vccq->unused = false;
- }
-out:
- return ret;
-}
-
static int __ufshcd_setup_clocks(struct ufs_hba *hba, bool on,
bool skip_ref_clk)
{
--
2.17.1
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