[PATCH hulk-4.19-next 03/10] DTS:DTS2019030103192 Description:{fromtree} scsi:hisi_sas: fix calls to dma_set_mask_and_coherent()

[chenxiang <chenxiang66@xxxxxxxxxxxxx>]

From: c00284940 <c00284940@xxxxxxxxxx>

plinth inclusion
category: bugfix
bugzilla: NA
DTS: DTS2019030103192
CVE: NA

The change to use dma_set_mask_and_coherent() incorrectly made a second
call with the 32 bit DMA mask value when the call with the 64 bit DMA
mask value succeeded.  This resulted in FC connections failing due
to corrupted data buffers, and various other SCSI/FCP I/O errors.

Fixes: e4db40e ("scsi: hisi_sas: use dma_set_mask_and_coherent")
Cc: <stable@xxxxxxxxxxxxxxx>
Suggested-by: Ewan D. Milne <emilne@xxxxxxxxxx>
Signed-off-by: Hannes Reinecke <hare@xxxxxxxx>

Change-Id: I2d8b409b5b9675a8d7a17730cde342b2f7579c38
Signed-off-by: c00284940 <c00284940@xxxxxxxxxx>
Reviewed-on: http://10.90.31.173:8080/4799
Tested-by: public TuringEE <turingee@xxxxxxxxxx>
Reviewed-by: huangdaode 00314581 <huangdaode@xxxxxxxxxxxxx>
Reviewed-by: public TuringEE <turingee@xxxxxxxxxx>
---
 drivers/scsi/hisi_sas/hisi_sas_main.c  |  8 ++++++--
 drivers/scsi/hisi_sas/hisi_sas_v3_hw.c | 15 +++++++--------
 2 files changed, 13 insertions(+), 10 deletions(-)

diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c
index ff32799..a2a4c74 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_main.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_main.c
@@ -2556,6 +2556,7 @@ static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
 	struct Scsi_Host *shost;
 	struct hisi_hba *hisi_hba;
 	struct device *dev = &pdev->dev;
+	int error;
 
 	shost = scsi_host_alloc(hw->sht, sizeof(*hisi_hba));
 	if (!shost) {
@@ -2576,8 +2577,11 @@ static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
 	if (hisi_sas_get_fw_info(hisi_hba) < 0)
 		goto err_out;
 
-	if (dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)) &&
-	    dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32))) {
+	error = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
+	if (error)
+		error = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
+
+	if (error) {
 		dev_err(dev, "No usable DMA addressing method\n");
 		goto err_out;
 	}
diff --git a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
index b4bde32..24db55f 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
@@ -2903,14 +2903,13 @@ hisi_sas_v3_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	if (rc)
 		goto err_out_disable_device;
 
-	if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) != 0) ||
-	    (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)) != 0)) {
-		if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
-		   (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
-			dev_err(dev, "No usable DMA addressing method\n");
-			rc = -EIO;
-			goto err_out_regions;
-		}
+	rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
+	if (rc)
+		rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
+	if (rc) {
+		dev_err(dev, "No usable DMA addressing method\n");
+		rc = -ENODEV;
+		goto err_out_regions;
 	}
 
 	shost = hisi_sas_shost_alloc_pci(pdev);
-- 
2.8.1