From: Karan Tilak Kumar <kartilak@cisco.com>
Date: Fri, 13 May 2022 13:56:05 -0700
Subject: scsi: fnic: Replace DMA mask of 64 bits with 47 bits
Git-commit: b559b99a5c08194c14dc271e69ca786771b353dc
Patch-mainline: v5.19-rc1
References: bsc#1199631

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.

[lduncan: modified/refreshed by hand to apply correctly to an older driver.]

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>
Acked-by: Lee Duncan <lduncan@suse.com>
---
 drivers/scsi/fnic/fnic_main.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/drivers/scsi/fnic/fnic_main.c
+++ b/drivers/scsi/fnic/fnic_main.c
@@ -608,10 +608,10 @@ static int fnic_probe(struct pci_dev *pd
 	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 = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
+	err = pci_set_dma_mask(pdev, DMA_BIT_MASK(47));
 	if (err) {
 		err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
 		if (err) {