linux-kernel - [PATCH v2] tg3: fix return value check in tg3_read

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Message-Id: <1293630031-27372-1-git-send-email-dsterba@suse.cz>
Date:	Wed, 29 Dec 2010 14:40:31 +0100
From:	David Sterba <dsterba@...e.cz>
To:	mcarlson@...adcom.com
Cc:	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	David Sterba <dsterba@...e.cz>,
	Michael Chan <mchan@...adcom.com>
Subject: [PATCH v2] tg3: fix return value check in tg3_read_vpd()

Besides -ETIMEDOUT and -EINTR, pci_read_vpd may return other error
values like -ENODEV or -EINVAL which are ignored due to the buggy
check, but the data are not read from VPD anyway and this is checked
subsequently with at most 3 needless loop iterations. This does not
show up as a runtime bug.

CC: Matt Carlson <mcarlson@...adcom.com>
CC: Michael Chan <mchan@...adcom.com>
Signed-off-by: David Sterba <dsterba@...e.cz>
---
 drivers/net/tg3.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index 30ccbb6..6f97b7b 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -12658,7 +12658,7 @@ static void __devinit tg3_read_vpd(struct tg3 *tp)
 			cnt = pci_read_vpd(tp->pdev, pos,
 					   TG3_NVM_VPD_LEN - pos,
 					   &vpd_data[pos]);
-			if (cnt == -ETIMEDOUT || -EINTR)
+			if (cnt == -ETIMEDOUT || cnt == -EINTR)
 				cnt = 0;
 			else if (cnt < 0)
 				goto out_not_found;
-- 
1.7.4.rc0

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