linux-kernel - [PATCH 1/1] scsi: fnic: fix improper return value

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Date:   Sun,  4 Dec 2016 13:58:28 +0800
From:   Pan Bian <bianpan201604@....com>
To:     Hiral Patel <hiralpat@...co.com>, Suma Ramars <sramars@...co.com>,
        Brian Uchino <buchino@...co.com>,
        "James E.J. Bottomley" <jejb@...ux.vnet.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        linux-scsi@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, Pan Bian <bianpan2016@....com>
Subject: [PATCH 1/1] scsi: fnic: fix improper return value

From: Pan Bian <bianpan2016@....com>

When the calls to mempool_create_slab_pool() return unexpected values,
the value of return variable err is 0. 0 means no error. Thus, the
caller of fnic_probe() cannot detect the error, and may be misled. This
patch fixes the bug, assigning "-ENOMEM" to err before calling
mempool_create_slab_pool().

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=189051

Signed-off-by: Pan Bian <bianpan2016@....com>
---
 drivers/scsi/fnic/fnic_main.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/scsi/fnic/fnic_main.c b/drivers/scsi/fnic/fnic_main.c
index 58ce902..389c13e 100644
--- a/drivers/scsi/fnic/fnic_main.c
+++ b/drivers/scsi/fnic/fnic_main.c
@@ -735,6 +735,7 @@ static int fnic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	for (i = 0; i < FNIC_IO_LOCKS; i++)
 		spin_lock_init(&fnic->io_req_lock[i]);
 
+	err = -ENOMEM;
 	fnic->io_req_pool = mempool_create_slab_pool(2, fnic_io_req_cache);
 	if (!fnic->io_req_pool)
 		goto err_out_free_resources;
-- 
1.9.1