Merge 17c66e9e49a181498ae3c75809c98fdbe630de28 on remote branch

Change-Id: I49238aefe09bba152a8000c046959157c328f183

5 files changed, 37 insertions, 12 deletions

diff --git a/drivers/scsi/libsas/sas_expander.c b/drivers/scsi/libsas/sas_expander.c
index 1a6f65db615e..ee1f9ee995e5 100644
--- a/drivers/scsi/libsas/sas_expander.c
+++ b/drivers/scsi/libsas/sas_expander.c
@@ -2027,6 +2027,11 @@ static int sas_rediscover_dev(struct domain_device *dev, int phy_id, bool last)
 	if ((SAS_ADDR(sas_addr) == 0) || (res == -ECOMM)) {
 		phy->phy_state = PHY_EMPTY;
 		sas_unregister_devs_sas_addr(dev, phy_id, last);
+		/*
+		 * Even though the PHY is empty, for convenience we discover
+		 * the PHY to update the PHY info, like negotiated linkrate.
+		 */
+		sas_ex_phy_discover(dev, phy_id);
 		return res;
 	} else if (SAS_ADDR(sas_addr) == SAS_ADDR(phy->attached_sas_addr) &&
 		   dev_type_flutter(type, phy->attached_dev_type)) {
diff --git a/drivers/scsi/lpfc/lpfc_hbadisc.c b/drivers/scsi/lpfc/lpfc_hbadisc.c
index 4131addfb872..a67950908db1 100644
--- a/drivers/scsi/lpfc/lpfc_hbadisc.c
+++ b/drivers/scsi/lpfc/lpfc_hbadisc.c
@@ -902,7 +902,11 @@ lpfc_linkdown(struct lpfc_hba *phba)
 			lpfc_linkdown_port(vports[i]);
 		}
 	lpfc_destroy_vport_work_array(phba, vports);
-	/* Clean up any firmware default rpi's */
+
+	/* Clean up any SLI3 firmware default rpi's */
+	if (phba->sli_rev > LPFC_SLI_REV3)
+		goto skip_unreg_did;
+
 	mb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 	if (mb) {
 		lpfc_unreg_did(phba, 0xffff, LPFC_UNREG_ALL_DFLT_RPIS, mb);
@@ -914,6 +918,7 @@ lpfc_linkdown(struct lpfc_hba *phba)
 		}
 	}
 
+ skip_unreg_did:
 	/* Setup myDID for link up if we are in pt2pt mode */
 	if (phba->pport->fc_flag & FC_PT2PT) {
 		phba->pport->fc_myDID = 0;
@@ -4647,6 +4652,10 @@ lpfc_unreg_default_rpis(struct lpfc_vport *vport)
 	LPFC_MBOXQ_t     *mbox;
 	int rc;
 
+	/* Unreg DID is an SLI3 operation. */
+	if (phba->sli_rev > LPFC_SLI_REV3)
+		return;
+
 	mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 	if (mbox) {
 		lpfc_unreg_did(phba, vport->vpi, LPFC_UNREG_ALL_DFLT_RPIS,
diff --git a/drivers/scsi/qla4xxx/ql4_os.c b/drivers/scsi/qla4xxx/ql4_os.c
index c158967b59d7..d220b4f691c7 100644
--- a/drivers/scsi/qla4xxx/ql4_os.c
+++ b/drivers/scsi/qla4xxx/ql4_os.c
@@ -5939,7 +5939,7 @@ static int get_fw_boot_info(struct scsi_qla_host *ha, uint16_t ddb_index[])
 		val = rd_nvram_byte(ha, sec_addr);
 		if (val & BIT_7)
 			ddb_index[1] = (val & 0x7f);
-
+		goto exit_boot_info;
 	} else if (is_qla80XX(ha)) {
 		buf = dma_alloc_coherent(&ha->pdev->dev, size,
 					 &buf_dma, GFP_KERNEL);
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 605092092049..bfd7e3840874 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -2415,7 +2415,6 @@ sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer)
 	int res;
 	struct scsi_device *sdp = sdkp->device;
 	struct scsi_mode_data data;
-	int disk_ro = get_disk_ro(sdkp->disk);
 
 	set_disk_ro(sdkp->disk, 0);
 	if (sdp->skip_ms_page_3f) {
@@ -2455,7 +2454,7 @@ sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer)
 			  "Test WP failed, assume Write Enabled\n");
 	} else {
 		sdkp->write_prot = ((data.device_specific & 0x80) != 0);
-		set_disk_ro(sdkp->disk, sdkp->write_prot || disk_ro);
+		set_disk_ro(sdkp->disk, sdkp->write_prot);
 	}
 }
 
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 86a5bae0513b..2c1ee272f4f7 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -7162,19 +7162,19 @@ static u32 ufshcd_find_max_sup_active_icc_level(struct ufs_hba *hba,
 		goto out;
 	}
 
-	if (hba->vreg_info.vcc)
+	if (hba->vreg_info.vcc && hba->vreg_info.vcc->max_uA)
 		icc_level = ufshcd_get_max_icc_level(
 				hba->vreg_info.vcc->max_uA,
 				POWER_DESC_MAX_ACTV_ICC_LVLS - 1,
 				&desc_buf[PWR_DESC_ACTIVE_LVLS_VCC_0]);
 
-	if (hba->vreg_info.vccq)
+	if (hba->vreg_info.vccq && hba->vreg_info.vccq->max_uA)
 		icc_level = ufshcd_get_max_icc_level(
 				hba->vreg_info.vccq->max_uA,
 				icc_level,
 				&desc_buf[PWR_DESC_ACTIVE_LVLS_VCCQ_0]);
 
-	if (hba->vreg_info.vccq2)
+	if (hba->vreg_info.vccq2 && hba->vreg_info.vccq2->max_uA)
 		icc_level = ufshcd_get_max_icc_level(
 				hba->vreg_info.vccq2->max_uA,
 				icc_level,
@@ -7950,6 +7950,15 @@ static int ufshcd_config_vreg_load(struct device *dev, struct ufs_vreg *vreg,
 	if (!vreg)
 		return 0;
 
+	/*
+	 * "set_load" operation shall be required on those regulators
+	 * which specifically configured current limitation. Otherwise
+	 * zero max_uA may cause unexpected behavior when regulator is
+	 * enabled or set as high power mode.
+	 */
+	if (!vreg->max_uA)
+		return 0;
+
 	ret = regulator_set_load(vreg->reg, ua);
 	if (ret < 0) {
 		dev_err(dev, "%s: %s set load (ua=%d) failed, err=%d\n",
@@ -8001,12 +8010,15 @@ static int ufshcd_config_vreg(struct device *dev,
 		if (ret)
 			goto out;
 
-		min_uV = on ? vreg->min_uV : 0;
-		ret = regulator_set_voltage(reg, min_uV, vreg->max_uV);
-		if (ret) {
-			dev_err(dev, "%s: %s set voltage failed, err=%d\n",
+		if (vreg->min_uV && vreg->max_uV) {
+			min_uV = on ? vreg->min_uV : 0;
+			ret = regulator_set_voltage(reg, min_uV, vreg->max_uV);
+			if (ret) {
+				dev_err(dev,
+					"%s: %s set voltage failed, err=%d\n",
 					__func__, name, ret);
-			goto out;
+				goto out;
+			}
 		}
 	}
 out: