[PATCH 4.18 105/228] scsi: bnx2i: add error handling for ioremap_nocache

[Greg Kroah-Hartman]

4.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Zhouyang Jia <jiazhouyang09@xxxxxxxxx>

[ Upstream commit aa154ea885eb0c2407457ce9c1538d78c95456fa ]

When ioremap_nocache fails, the lack of error-handling code may cause
unexpected results.

This patch adds error-handling code after calling ioremap_nocache.

Signed-off-by: Zhouyang Jia <jiazhouyang09@xxxxxxxxx>
Reviewed-by: Johannes Thumshirn <jthumshirn@xxxxxxx>
Acked-by: Manish Rangankar <Manish.Rangankar@xxxxxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/scsi/bnx2i/bnx2i_hwi.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/scsi/bnx2i/bnx2i_hwi.c
+++ b/drivers/scsi/bnx2i/bnx2i_hwi.c
@@ -2727,6 +2727,8 @@ int bnx2i_map_ep_dbell_regs(struct bnx2i
 					      BNX2X_DOORBELL_PCI_BAR);
 		reg_off = (1 << BNX2X_DB_SHIFT) * (cid_num & 0x1FFFF);
 		ep->qp.ctx_base = ioremap_nocache(reg_base + reg_off, 4);
+		if (!ep->qp.ctx_base)
+			return -ENOMEM;
 		goto arm_cq;
 	}