scsi: fnic: Replace DMA mask of 64 bits with 47 bits

Cisco VIC supports only 47 bits.  If the host sends DMA addresses that are
greater than 47 bits, it causes work queue (WQ) errors in the VIC.

Link: https://lore.kernel.org/r/20220513205605.81788-1-kartilak@cisco.com
Tested-by: Karan Tilak Kumar <kartilak@cisco.com>
Co-developed-by: Dhanraj Jhawar <djhawar@cisco.com>
Signed-off-by: Dhanraj Jhawar <djhawar@cisco.com>
Co-developed-by: Sesidhar Baddela <sebaddel@cisco.com>
Signed-off-by: Sesidhar Baddela <sebaddel@cisco.com>
Signed-off-by: Arulprabhu Ponnusamy <arulponn@cisco.com>
Signed-off-by: Karan Tilak Kumar <kartilak@cisco.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Author: Karan Tilak Kumar

drivers/scsi/fnic/fnic.h

@@ -39,7 +39,7 @@
 
 #define DRV_NAME		"fnic"
 #define DRV_DESCRIPTION		"Cisco FCoE HBA Driver"
-#define DRV_VERSION		"1.6.0.53"
+#define DRV_VERSION		"1.6.0.54"
 #define PFX			DRV_NAME ": "
 #define DFX                     DRV_NAME "%d: "
 

drivers/scsi/fnic/fnic_main.c

@@ -612,10 +612,10 @@ static int fnic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	pci_set_master(pdev);
 
 	/* Query PCI controller on system for DMA addressing
-	 * limitation for the device.  Try 64-bit first, and
-	 * fail to 32-bit.
+	 * limitation for the device.  Try 47-bit first, and
+	 * fail to 32-bit. Cisco VIC supports 47 bits only.
 	 */
-	err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
+	err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(47));
 	if (err) {
 		err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
 		if (err) {