linux-kernel - [PATCH] mwifiex: don't return zero on failure paths in mwifiex_pcie

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Message-Id: <1359147363-9587-1-git-send-email-khoroshilov@ispras.ru>
Date:	Sat, 26 Jan 2013 00:56:03 +0400
From:	Alexey Khoroshilov <khoroshilov@...ras.ru>
To:	Bing Zhao <bzhao@...vell.com>
Cc:	Alexey Khoroshilov <khoroshilov@...ras.ru>,
	"John W. Linville" <linville@...driver.com>,
	linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, ldv-project@...uxtesting.org
Subject: [PATCH] mwifiex: don't return zero on failure paths in mwifiex_pcie_init()

If pci_iomap() fails in mwifiex_pcie_init(), it breaks off initialization,
deallocates all resources, but returns zero.
The patch adds -EIO as return value in this case.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov@...ras.ru>
---
 drivers/net/wireless/mwifiex/pcie.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/wireless/mwifiex/pcie.c b/drivers/net/wireless/mwifiex/pcie.c
index 13fbc4e..9d9349c 100644
--- a/drivers/net/wireless/mwifiex/pcie.c
+++ b/drivers/net/wireless/mwifiex/pcie.c
@@ -1739,6 +1739,7 @@ static int mwifiex_pcie_init(struct mwifiex_adapter *adapter)
 	card->pci_mmap = pci_iomap(pdev, 0, 0);
 	if (!card->pci_mmap) {
 		dev_err(adapter->dev, "iomap(0) error\n");
+		ret = -EIO;
 		goto err_iomap0;
 	}
 	ret = pci_request_region(pdev, 2, DRV_NAME);
@@ -1749,6 +1750,7 @@ static int mwifiex_pcie_init(struct mwifiex_adapter *adapter)
 	card->pci_mmap1 = pci_iomap(pdev, 2, 0);
 	if (!card->pci_mmap1) {
 		dev_err(adapter->dev, "iomap(2) error\n");
+		ret = -EIO;
 		goto err_iomap2;
 	}
 
-- 
1.7.9.5

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