[PATCH v4 0/4] scsi: ufs: Fix WriteBooster and cleanup UFS driver

[PATCH v4 0/4] scsi: ufs: Fix WriteBooster and cleanup UFS driver

[Stanley Chu]

Hi,

This patch set fixes some WriteBooster issues and do small cleanup in UFS driver

v3 -> v4
  - Squash patch [4] and [5] (Asutosh)
  - Fix commit message in patch [4]

v2 -> v3
  - Introduce patch [5] to fix possible VCC power drain during runtime suspend (Asutosh)

v1 -> v2
  - Remove dummy new line in patch [4] (Asutosh)
  - Add more limitation to allow WriteBooster flush during Hibern8 in runtime-suspend. Now the device power mode is kept as Active power mode only if link is put in Hibern8 or Auto-Hibern8 is enabled during runtime-suspend (Asutosh)

Stanley Chu (4):
  scsi: ufs: Remove unnecessary memset for dev_info
  scsi: ufs: Allow WriteBooster on UFS 2.2 devices
  scsi: ufs: Fix index of attributes query for WriteBooster feature
  scsi: ufs: Fix WriteBooster flush during runtime suspend

 drivers/scsi/ufs/ufs-sysfs.c | 13 ++++-
 drivers/scsi/ufs/ufs.h       |  2 +-
 drivers/scsi/ufs/ufshcd.c    | 99 +++++++++++++++++++++++++-----------
 drivers/scsi/ufs/ufshcd.h    |  3 +-
 4 files changed, 82 insertions(+), 35 deletions(-)

-- 
2.18.0

[PATCH v4 1/4] scsi: ufs: Remove unnecessary memset for dev_info

[Stanley Chu]

The whole UFS host instance has been zero-initialized by
scsi_host_alloc(), thus UFS driver does not need to clear
"dev_info" member specifically in ufshcd_device_params_init().

Simply remove the unnecessary code.

Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Reviewed-by: Avri Altman <avri.altman@wdc.com>
---
 drivers/scsi/ufs/ufshcd.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index c3389c9a4f29..9e55c524f330 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -7267,9 +7267,6 @@ static int ufshcd_device_params_init(struct ufs_hba *hba)
 	bool flag;
 	int ret;
 
-	/* Clear any previous UFS device information */
-	memset(&hba->dev_info, 0, sizeof(hba->dev_info));
-
 	/* Init check for device descriptor sizes */
 	ufshcd_init_desc_sizes(hba);
 
-- 
2.18.0

[PATCH v4 2/4] scsi: ufs: Allow WriteBooster on UFS 2.2 devices

[Stanley Chu]

According to the UFS specification, WriteBooster is officially
supported by UFS 2.2.

Since UFS 2.2 specification has been finalized in JEDEC and
such devices have also showed up in the market, modify the
checking rule for ufshcd_wb_probe() to allow these devices to enable
WriteBooster.

Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Reviewed-by: Avri Altman <avri.altman@wdc.com>
---
 drivers/scsi/ufs/ufshcd.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 9e55c524f330..0dbd8a7a6642 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -6930,6 +6930,7 @@ static int ufs_get_device_desc(struct ufs_hba *hba)
 	 * UFS_DEVICE_QUIRK_SUPPORT_EXTENDED_FEATURES enabled
 	 */
 	if (dev_info->wspecversion >= 0x310 ||
+	    dev_info->wspecversion == 0x220 ||
 	    (hba->dev_quirks & UFS_DEVICE_QUIRK_SUPPORT_EXTENDED_FEATURES))
 		ufshcd_wb_probe(hba, desc_buf);
 
-- 
2.18.0

[PATCH v4 3/4] scsi: ufs: Fix index of attributes query for WriteBooster feature

[Stanley Chu]

For WriteBooster feature related attributes, the index used by
query shall be LUN ID if LU Dedicated buffer mode is enabled.

Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Reviewed-by: Avri Altman <avri.altman@wdc.com>
---
 drivers/scsi/ufs/ufs-sysfs.c | 13 +++++++++++--
 drivers/scsi/ufs/ufshcd.c    | 16 ++++++++++------
 drivers/scsi/ufs/ufshcd.h    |  2 +-
 3 files changed, 22 insertions(+), 9 deletions(-)

diff --git a/drivers/scsi/ufs/ufs-sysfs.c b/drivers/scsi/ufs/ufs-sysfs.c
index a0b3763e1dc2..2d71d232a69d 100644
--- a/drivers/scsi/ufs/ufs-sysfs.c
+++ b/drivers/scsi/ufs/ufs-sysfs.c
@@ -637,7 +637,7 @@ static ssize_t _name##_show(struct device *dev,				\
 	int ret;							\
 	struct ufs_hba *hba = dev_get_drvdata(dev);			\
 	if (ufshcd_is_wb_flags(QUERY_FLAG_IDN##_uname))			\
-		index = ufshcd_wb_get_flag_index(hba);			\
+		index = ufshcd_wb_get_query_index(hba);			\
 	pm_runtime_get_sync(hba->dev);					\
 	ret = ufshcd_query_flag(hba, UPIU_QUERY_OPCODE_READ_FLAG,	\
 		QUERY_FLAG_IDN##_uname, index, &flag);			\
@@ -680,6 +680,12 @@ static const struct attribute_group ufs_sysfs_flags_group = {
 	.attrs = ufs_sysfs_device_flags,
 };
 
+static inline bool ufshcd_is_wb_attrs(enum attr_idn idn)
+{
+	return ((idn >= QUERY_ATTR_IDN_WB_FLUSH_STATUS) &&
+		(idn <= QUERY_ATTR_IDN_CURR_WB_BUFF_SIZE));
+}
+
 #define UFS_ATTRIBUTE(_name, _uname)					\
 static ssize_t _name##_show(struct device *dev,				\
 	struct device_attribute *attr, char *buf)			\
@@ -687,9 +693,12 @@ static ssize_t _name##_show(struct device *dev,				\
 	struct ufs_hba *hba = dev_get_drvdata(dev);			\
 	u32 value;							\
 	int ret;							\
+	u8 index = 0;							\
+	if (ufshcd_is_wb_attrs(QUERY_ATTR_IDN##_uname))			\
+		index = ufshcd_wb_get_query_index(hba);			\
 	pm_runtime_get_sync(hba->dev);					\
 	ret = ufshcd_query_attr(hba, UPIU_QUERY_OPCODE_READ_ATTR,	\
-		QUERY_ATTR_IDN##_uname, 0, 0, &value);			\
+		QUERY_ATTR_IDN##_uname, index, 0, &value);		\
 	pm_runtime_put_sync(hba->dev);					\
 	if (ret)							\
 		return -EINVAL;						\
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 0dbd8a7a6642..3262ac0e39d4 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -5199,7 +5199,7 @@ static int ufshcd_wb_ctrl(struct ufs_hba *hba, bool enable)
 	else
 		opcode = UPIU_QUERY_OPCODE_CLEAR_FLAG;
 
-	index = ufshcd_wb_get_flag_index(hba);
+	index = ufshcd_wb_get_query_index(hba);
 	ret = ufshcd_query_flag_retry(hba, opcode,
 				      QUERY_FLAG_IDN_WB_EN, index, NULL);
 	if (ret) {
@@ -5225,7 +5225,7 @@ static int ufshcd_wb_toggle_flush_during_h8(struct ufs_hba *hba, bool set)
 	else
 		val = UPIU_QUERY_OPCODE_CLEAR_FLAG;
 
-	index = ufshcd_wb_get_flag_index(hba);
+	index = ufshcd_wb_get_query_index(hba);
 	return ufshcd_query_flag_retry(hba, val,
 				QUERY_FLAG_IDN_WB_BUFF_FLUSH_DURING_HIBERN8,
 				index, NULL);
@@ -5248,7 +5248,7 @@ static int ufshcd_wb_buf_flush_enable(struct ufs_hba *hba)
 	if (!ufshcd_is_wb_allowed(hba) || hba->wb_buf_flush_enabled)
 		return 0;
 
-	index = ufshcd_wb_get_flag_index(hba);
+	index = ufshcd_wb_get_query_index(hba);
 	ret = ufshcd_query_flag_retry(hba, UPIU_QUERY_OPCODE_SET_FLAG,
 				      QUERY_FLAG_IDN_WB_BUFF_FLUSH_EN,
 				      index, NULL);
@@ -5270,7 +5270,7 @@ static int ufshcd_wb_buf_flush_disable(struct ufs_hba *hba)
 	if (!ufshcd_is_wb_allowed(hba) || !hba->wb_buf_flush_enabled)
 		return 0;
 
-	index = ufshcd_wb_get_flag_index(hba);
+	index = ufshcd_wb_get_query_index(hba);
 	ret = ufshcd_query_flag_retry(hba, UPIU_QUERY_OPCODE_CLEAR_FLAG,
 				      QUERY_FLAG_IDN_WB_BUFF_FLUSH_EN,
 				      index, NULL);
@@ -5290,10 +5290,12 @@ static bool ufshcd_wb_presrv_usrspc_keep_vcc_on(struct ufs_hba *hba,
 {
 	u32 cur_buf;
 	int ret;
+	u8 index;
 
+	index = ufshcd_wb_get_query_index(hba);
 	ret = ufshcd_query_attr_retry(hba, UPIU_QUERY_OPCODE_READ_ATTR,
 					      QUERY_ATTR_IDN_CURR_WB_BUFF_SIZE,
-					      0, 0, &cur_buf);
+					      index, 0, &cur_buf);
 	if (ret) {
 		dev_err(hba->dev, "%s dCurWriteBoosterBufferSize read failed %d\n",
 			__func__, ret);
@@ -5316,6 +5318,7 @@ static bool ufshcd_wb_keep_vcc_on(struct ufs_hba *hba)
 {
 	int ret;
 	u32 avail_buf;
+	u8 index;
 
 	if (!ufshcd_is_wb_allowed(hba))
 		return false;
@@ -5330,9 +5333,10 @@ static bool ufshcd_wb_keep_vcc_on(struct ufs_hba *hba)
 	 * buffer (dCurrentWriteBoosterBufferSize). There's no point in
 	 * keeping vcc on when current buffer is empty.
 	 */
+	index = ufshcd_wb_get_query_index(hba);
 	ret = ufshcd_query_attr_retry(hba, UPIU_QUERY_OPCODE_READ_ATTR,
 				      QUERY_ATTR_IDN_AVAIL_WB_BUFF_SIZE,
-				      0, 0, &avail_buf);
+				      index, 0, &avail_buf);
 	if (ret) {
 		dev_warn(hba->dev, "%s dAvailableWriteBoosterBufferSize read failed %d\n",
 			 __func__, ret);
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index 88d420242782..9acaeaf94d29 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -868,7 +868,7 @@ static inline bool ufshcd_keep_autobkops_enabled_except_suspend(
 	return hba->caps & UFSHCD_CAP_KEEP_AUTO_BKOPS_ENABLED_EXCEPT_SUSPEND;
 }
 
-static inline u8 ufshcd_wb_get_flag_index(struct ufs_hba *hba)
+static inline u8 ufshcd_wb_get_query_index(struct ufs_hba *hba)
 {
 	if (hba->dev_info.b_wb_buffer_type == WB_BUF_MODE_LU_DEDICATED)
 		return hba->dev_info.wb_dedicated_lu;
-- 
2.18.0

[PATCH v4 4/4] scsi: ufs: Fix WriteBooster flush during runtime suspend

[Stanley Chu]

Currently UFS host driver promises VCC supply if UFS device
needs to do WriteBooster flush during runtime suspend.

However the UFS specification mentions,

"While the flushing operation is in progress, the device is
in Active power mode."

Therefore UFS host driver needs to promise more: Keep UFS
device as "Active power mode", otherwise UFS device shall not
do any flush if device enters Sleep or PowerDown power mode.
Similarly, the same promises shall be applied if device needs
urgent BKOP during runtime suspend.

Fix this by not changing device power mode if WriteBooster
flush or urgent BKOP is required in ufshcd_suspend().

Now, if device finishes its job but not resumed for a very
long time, system will have unnecessary power drain because
VCC is still supplied. A method to re-check the threshold of
keeping VCC supply is required to fix the power drain. However,
the threshold re-check needs to re-activate the link first
because the decision depends on the latest device status.

So, also introduce a delayed work to force runtime resume
after a certain delay during runtime suspend. This makes
threshold re-check happen natually in the entrance of next
runtime-suspend. The device can continue its WriteBooster flush
or urgent BKOP jobs soon after resumed if device has no upcoming
requests and link enters hibern8 state either by Auto-Hibern8
or hibern8 during clk-gating scheme. This solution not only
prevents power drain but also makes as much use of time as
possible for device's background jobs.

Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
---
 drivers/scsi/ufs/ufs.h    |  2 +-
 drivers/scsi/ufs/ufshcd.c | 79 ++++++++++++++++++++++++++++-----------
 drivers/scsi/ufs/ufshcd.h |  1 +
 3 files changed, 59 insertions(+), 23 deletions(-)

diff --git a/drivers/scsi/ufs/ufs.h b/drivers/scsi/ufs/ufs.h
index fadba3a3bbcd..c70845d41449 100644
--- a/drivers/scsi/ufs/ufs.h
+++ b/drivers/scsi/ufs/ufs.h
@@ -574,7 +574,7 @@ struct ufs_dev_info {
 	u32 d_ext_ufs_feature_sup;
 	u8 b_wb_buffer_type;
 	u32 d_wb_alloc_units;
-	bool keep_vcc_on;
+	bool b_rpm_dev_flush_capable;
 	u8 b_presrv_uspc_en;
 };
 
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 3262ac0e39d4..94782b9b33c1 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -94,6 +94,9 @@
 /* default delay of autosuspend: 2000 ms */
 #define RPM_AUTOSUSPEND_DELAY_MS 2000
 
+/* Default delay of RPM device flush delayed work */
+#define RPM_DEV_FLUSH_RECHECK_WORK_DELAY_MS 5000
+
 /* Default value of wait time before gating device ref clock */
 #define UFSHCD_REF_CLK_GATING_WAIT_US 0xFF /* microsecs */
 
@@ -5314,7 +5317,7 @@ static bool ufshcd_wb_presrv_usrspc_keep_vcc_on(struct ufs_hba *hba,
 	return false;
 }
 
-static bool ufshcd_wb_keep_vcc_on(struct ufs_hba *hba)
+static bool ufshcd_wb_need_flush(struct ufs_hba *hba)
 {
 	int ret;
 	u32 avail_buf;
@@ -5352,6 +5355,21 @@ static bool ufshcd_wb_keep_vcc_on(struct ufs_hba *hba)
 	return ufshcd_wb_presrv_usrspc_keep_vcc_on(hba, avail_buf);
 }
 
+static void ufshcd_rpm_dev_flush_recheck_work(struct work_struct *work)
+{
+	struct ufs_hba *hba = container_of(to_delayed_work(work),
+					   struct ufs_hba,
+					   rpm_dev_flush_recheck_work);
+	/*
+	 * To prevent unnecessary VCC power drain after device finishes
+	 * WriteBooster buffer flush or Auto BKOPs, force runtime resume
+	 * after a certain delay to recheck the threshold by next runtime
+	 * supsend.
+	 */
+	pm_runtime_get_sync(hba->dev);
+	pm_runtime_put_sync(hba->dev);
+}
+
 /**
  * ufshcd_exception_event_handler - handle exceptions raised by device
  * @work: pointer to work data
@@ -8099,8 +8117,7 @@ static void ufshcd_vreg_set_lpm(struct ufs_hba *hba)
 	    !hba->dev_info.is_lu_power_on_wp) {
 		ufshcd_setup_vreg(hba, false);
 	} else if (!ufshcd_is_ufs_dev_active(hba)) {
-		if (!hba->dev_info.keep_vcc_on)
-			ufshcd_toggle_vreg(hba->dev, hba->vreg_info.vcc, false);
+		ufshcd_toggle_vreg(hba->dev, hba->vreg_info.vcc, false);
 		if (!ufshcd_is_link_active(hba)) {
 			ufshcd_config_vreg_lpm(hba, hba->vreg_info.vccq);
 			ufshcd_config_vreg_lpm(hba, hba->vreg_info.vccq2);
@@ -8225,27 +8242,30 @@ static int ufshcd_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op)
 			ufshcd_disable_auto_bkops(hba);
 		}
 		/*
-		 * With wb enabled, if the bkops is enabled or if the
-		 * configured WB type is 70% full, keep vcc ON
-		 * for the device to flush the wb buffer
+		 * If device needs to do BKOP or WB buffer flush during
+		 * Hibern8, keep device power mode as "active power mode"
+		 * and VCC supply.
 		 */
-		if ((hba->auto_bkops_enabled && ufshcd_is_wb_allowed(hba)) ||
-		    ufshcd_wb_keep_vcc_on(hba))
-			hba->dev_info.keep_vcc_on = true;
-		else
-			hba->dev_info.keep_vcc_on = false;
-	} else {
-		hba->dev_info.keep_vcc_on = false;
-	}
+		hba->dev_info.b_rpm_dev_flush_capable =
+			hba->auto_bkops_enabled ||
+			(((req_link_state == UIC_LINK_HIBERN8_STATE) ||
+			((req_link_state == UIC_LINK_ACTIVE_STATE) &&
+			ufshcd_is_auto_hibern8_enabled(hba))) &&
+			ufshcd_wb_need_flush(hba));
+	}
+
+	if (req_dev_pwr_mode != hba->curr_dev_pwr_mode) {
+		if ((ufshcd_is_runtime_pm(pm_op) && !hba->auto_bkops_enabled) ||
+		    !ufshcd_is_runtime_pm(pm_op)) {
+			/* ensure that bkops is disabled */
+			ufshcd_disable_auto_bkops(hba);
+		}
 
-	if ((req_dev_pwr_mode != hba->curr_dev_pwr_mode) &&
-	    ((ufshcd_is_runtime_pm(pm_op) && !hba->auto_bkops_enabled) ||
-	    !ufshcd_is_runtime_pm(pm_op))) {
-		/* ensure that bkops is disabled */
-		ufshcd_disable_auto_bkops(hba);
-		ret = ufshcd_set_dev_pwr_mode(hba, req_dev_pwr_mode);
-		if (ret)
-			goto enable_gating;
+		if (!hba->dev_info.b_rpm_dev_flush_capable) {
+			ret = ufshcd_set_dev_pwr_mode(hba, req_dev_pwr_mode);
+			if (ret)
+				goto enable_gating;
+		}
 	}
 
 	flush_work(&hba->eeh_work);
@@ -8298,9 +8318,16 @@ static int ufshcd_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op)
 	if (hba->clk_scaling.is_allowed)
 		ufshcd_resume_clkscaling(hba);
 	hba->clk_gating.is_suspended = false;
+	hba->dev_info.b_rpm_dev_flush_capable = false;
 	ufshcd_release(hba);
 out:
+	if (hba->dev_info.b_rpm_dev_flush_capable) {
+		schedule_delayed_work(&hba->rpm_dev_flush_recheck_work,
+			msecs_to_jiffies(RPM_DEV_FLUSH_RECHECK_WORK_DELAY_MS));
+	}
+
 	hba->pm_op_in_progress = 0;
+
 	if (ret)
 		ufshcd_update_reg_hist(&hba->ufs_stats.suspend_err, (u32)ret);
 	return ret;
@@ -8389,6 +8416,11 @@ static int ufshcd_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op)
 	/* Enable Auto-Hibernate if configured */
 	ufshcd_auto_hibern8_enable(hba);
 
+	if (hba->dev_info.b_rpm_dev_flush_capable) {
+		hba->dev_info.b_rpm_dev_flush_capable = false;
+		cancel_delayed_work(&hba->rpm_dev_flush_recheck_work);
+	}
+
 	/* Schedule clock gating in case of no access to UFS device yet */
 	ufshcd_release(hba);
 
@@ -8862,6 +8894,9 @@ int ufshcd_init(struct ufs_hba *hba, void __iomem *mmio_base, unsigned int irq)
 						UFS_SLEEP_PWR_MODE,
 						UIC_LINK_HIBERN8_STATE);
 
+	INIT_DELAYED_WORK(&hba->rpm_dev_flush_recheck_work,
+			  ufshcd_rpm_dev_flush_recheck_work);
+
 	/* Set the default auto-hiberate idle timer value to 150 ms */
 	if (ufshcd_is_auto_hibern8_supported(hba) && !hba->ahit) {
 		hba->ahit = FIELD_PREP(UFSHCI_AHIBERN8_TIMER_MASK, 150) |
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index 9acaeaf94d29..bf97d616e597 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -745,6 +745,7 @@ struct ufs_hba {
 	struct request_queue	*bsg_queue;
 	bool wb_buf_flush_enabled;
 	bool wb_enabled;
+	struct delayed_work rpm_dev_flush_recheck_work;
 };
 
 /* Returns true if clocks can be gated. Otherwise false */
-- 
2.18.0

Re: [PATCH v4 0/4] scsi: ufs: Fix WriteBooster and cleanup UFS driver

[Asutosh Das (asd)]

On 5/22/2020 1:32 AM, Stanley Chu wrote:
> Hi,
> 
> This patch set fixes some WriteBooster issues and do small cleanup in UFS driver
> 
> v3 -> v4
>    - Squash patch [4] and [5] (Asutosh)
>    - Fix commit message in patch [4]
> 
> v2 -> v3
>    - Introduce patch [5] to fix possible VCC power drain during runtime suspend (Asutosh)
> 
> v1 -> v2
>    - Remove dummy new line in patch [4] (Asutosh)
>    - Add more limitation to allow WriteBooster flush during Hibern8 in runtime-suspend. Now the device power mode is kept as Active power mode only if link is put in Hibern8 or Auto-Hibern8 is enabled during runtime-suspend (Asutosh)
> 
> Stanley Chu (4):
>    scsi: ufs: Remove unnecessary memset for dev_info
>    scsi: ufs: Allow WriteBooster on UFS 2.2 devices
>    scsi: ufs: Fix index of attributes query for WriteBooster feature
>    scsi: ufs: Fix WriteBooster flush during runtime suspend
> 
>   drivers/scsi/ufs/ufs-sysfs.c | 13 ++++-
>   drivers/scsi/ufs/ufs.h       |  2 +-
>   drivers/scsi/ufs/ufshcd.c    | 99 +++++++++++++++++++++++++-----------
>   drivers/scsi/ufs/ufshcd.h    |  3 +-
>   4 files changed, 82 insertions(+), 35 deletions(-)
> 

This set looks good to me.

Reviewed-by: Asutosh Das <asutoshd@codeaurora.org>

-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
Linux Foundation Collaborative Project

Re: [PATCH v4 0/4] scsi: ufs: Fix WriteBooster and cleanup UFS driver

[Martin K. Petersen]

On Fri, 22 May 2020 16:32:08 +0800, Stanley Chu wrote:

> This patch set fixes some WriteBooster issues and do small cleanup in UFS driver
> 
> v3 -> v4
>   - Squash patch [4] and [5] (Asutosh)
>   - Fix commit message in patch [4]
> 
> v2 -> v3
>   - Introduce patch [5] to fix possible VCC power drain during runtime suspend (Asutosh)
> 
> [...]

Applied to 5.8/scsi-queue, thanks!

[1/4] scsi: ufs: Remove unnecessary memset for dev_info
      https://git.kernel.org/mkp/scsi/c/3a66ae512b09
[2/4] scsi: ufs: Allow WriteBooster on UFS 2.2 devices
      https://git.kernel.org/mkp/scsi/c/c7cee3e746a5
[3/4] scsi: ufs: Fix index of attributes query for WriteBooster feature
      https://git.kernel.org/mkp/scsi/c/e31011ab3709
[4/4] scsi: ufs: Fix WriteBooster flush during runtime suspend
      https://git.kernel.org/mkp/scsi/c/51dd905bd2f6

-- 
Martin K. Petersen	Oracle Linux Engineering