scsi: bnx2i: add error handling for ioremap_nocache

BugLink: https://bugs.launchpad.net/bugs/1836287
[ 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@gmail.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Acked-by: Manish Rangankar <Manish.Rangankar@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>

diff --git a/drivers/scsi/bnx2i/bnx2i_hwi.c b/drivers/scsi/bnx2i/bnx2i_hwi.c
index e0640e0f259f9643f88fa5821e175b1982e66445..4daac805f3f87160ae57f8b36e8c2fd93185a757 100644 (file)
--- a/drivers/scsi/bnx2i/bnx2i_hwi.c
+++ b/drivers/scsi/bnx2i/bnx2i_hwi.c
@@ -2732,6 +2732,8 @@ int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep)
                                              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;
        }