From: Xiang Chen <chenxiang66@hisilicon.com>
Date: Tue, 24 Aug 2021 18:00:56 +0800
Subject: scsi: hisi_sas: Use managed PCI functions
Git-commit: 4f6094f1663e2ed26a940f1842cdaa15c1dd649a
Patch-mainline: v5.16-rc1
References: git-fixes

Use managed PCI functions such as pcim_enable_device() and
pcim_iomap_regions() to simplify exception handling code.

Link: https://lore.kernel.org/r/1629799260-120116-2-git-send-email-john.garry@huawei.com
Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Lee Duncan <lduncan@suse.com>
---
 drivers/scsi/hisi_sas/hisi_sas_v3_hw.c | 20 ++++++++------------
 1 file changed, 8 insertions(+), 12 deletions(-)

diff --git a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
index 3ab669dc806f..e3be5743e77b 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
@@ -518,6 +518,8 @@ struct hisi_sas_err_record_v3 {
 #define CHNL_INT_STS_INT2_MSK BIT(3)
 #define CHNL_WIDTH 4
 
+#define BAR_NO_V3_HW	5
+
 enum {
 	DSM_FUNC_ERR_HANDLE_MSI = 0,
 };
@@ -4676,15 +4678,15 @@ hisi_sas_v3_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	struct sas_ha_struct *sha;
 	int rc, phy_nr, port_nr, i;
 
-	rc = pci_enable_device(pdev);
+	rc = pcim_enable_device(pdev);
 	if (rc)
 		goto err_out;
 
 	pci_set_master(pdev);
 
-	rc = pci_request_regions(pdev, DRV_NAME);
+	rc = pcim_iomap_regions(pdev, 1 << BAR_NO_V3_HW, DRV_NAME);
 	if (rc)
-		goto err_out_disable_device;
+		goto err_out;
 
 	rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
 	if (rc)
@@ -4692,20 +4694,20 @@ hisi_sas_v3_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	if (rc) {
 		dev_err(dev, "No usable DMA addressing method\n");
 		rc = -ENODEV;
-		goto err_out_regions;
+		goto err_out;
 	}
 
 	shost = hisi_sas_shost_alloc_pci(pdev);
 	if (!shost) {
 		rc = -ENOMEM;
-		goto err_out_regions;
+		goto err_out;
 	}
 
 	sha = SHOST_TO_SAS_HA(shost);
 	hisi_hba = shost_priv(shost);
 	dev_set_drvdata(dev, sha);
 
-	hisi_hba->regs = pcim_iomap(pdev, 5, 0);
+	hisi_hba->regs = pcim_iomap_table(pdev)[BAR_NO_V3_HW];
 	if (!hisi_hba->regs) {
 		dev_err(dev, "cannot map register\n");
 		rc = -ENOMEM;
@@ -4799,10 +4801,6 @@ hisi_sas_v3_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 err_out_ha:
 	hisi_sas_free(hisi_hba);
 	scsi_host_put(shost);
-err_out_regions:
-	pci_release_regions(pdev);
-err_out_disable_device:
-	pci_disable_device(pdev);
 err_out:
 	return rc;
 }
@@ -4840,8 +4838,6 @@ static void hisi_sas_v3_remove(struct pci_dev *pdev)
 	sas_remove_host(sha->core.shost);
 
 	hisi_sas_v3_destroy_irqs(pdev, hisi_hba);
-	pci_release_regions(pdev);
-	pci_disable_device(pdev);
 	hisi_sas_free(hisi_hba);
 	debugfs_exit_v3_hw(hisi_hba);
 	scsi_host_put(shost);