linux-kernel - [PATCH AUTOSEL for 4.4 025/162] scsi: lpfc: Fix return value of board_mode store routine in case of online failure

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Date:   Mon, 9 Apr 2018 00:28:00 +0000
From:   Sasha Levin <Alexander.Levin@...rosoft.com>
To:     "stable@...r.kernel.org" <stable@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     James Smart <jsmart2021@...il.com>,
        Dick Kennedy <dick.kennedy@...adcom.com>,
        James Smart <james.smart@...adcom.com>,
        "Martin K . Petersen" <martin.petersen@...cle.com>,
        Sasha Levin <Alexander.Levin@...rosoft.com>
Subject: [PATCH AUTOSEL for 4.4 025/162] scsi: lpfc: Fix return value of
 board_mode store routine in case of online failure

From: James Smart <jsmart2021@...il.com>

[ Upstream commit 522dceeb62ded1a7b538d2f1f61cc69a1402537d ]

On hbacmd reset failure, observing wrong string "nline" in kernel log.

On failure, non negative value (1) is returned from sysfs store
routine. It is interpreted as count by kernel and store routine is
called again with the remaining characters as input.

Fix: Return negative error code (-EIO) in case of failure.

Signed-off-by: Dick Kennedy <dick.kennedy@...adcom.com>
Signed-off-by: James Smart <james.smart@...adcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
---
 drivers/scsi/lpfc/lpfc_attr.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/scsi/lpfc/lpfc_attr.c b/drivers/scsi/lpfc/lpfc_attr.c
index 4639dac64e7f..5708bbc056c6 100644
--- a/drivers/scsi/lpfc/lpfc_attr.c
+++ b/drivers/scsi/lpfc/lpfc_attr.c
@@ -1090,6 +1090,8 @@ lpfc_board_mode_store(struct device *dev, struct device_attribute *attr,
 			goto board_mode_out;
 		}
 		wait_for_completion(&online_compl);
+		if (status)
+			status = -EIO;
 	} else if (strncmp(buf, "offline", sizeof("offline") - 1) == 0)
 		status = lpfc_do_offline(phba, LPFC_EVT_OFFLINE);
 	else if (strncmp(buf, "warm", sizeof("warm") - 1) == 0)
-- 
2.15.1