netdev - [PATCH net-next] mv88e6xxx: Fix uninitialized variable warning.

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-Id: <20180520.190505.1211749860830837732.davem@davemloft.net>
Date:   Sun, 20 May 2018 19:05:05 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     andrew@...n.ch
CC:     netdev@...r.kernel.org
Subject: [PATCH net-next] mv88e6xxx: Fix uninitialized variable warning.

In mv88e6xxx_probe(), ("np" or "pdata") might be an invariant
but GCC can't see that, therefore:

drivers/net/dsa/mv88e6xxx/chip.c: In function ‘mv88e6xxx_probe’:
drivers/net/dsa/mv88e6xxx/chip.c:4420:13: warning: ‘compat_info’ may be used uninitialized in this function [-Wmaybe-uninitialized]
  chip->info = compat_info;

Actually, it should have warned on the "if (!compat_info)" test, but
whatever.

Explicitly initialize to NULL in the variable declaration to
deal with this.

Fixes: 877b7cb0b6f2 ("net: dsa: mv88e6xxx: Add minimal platform_data support")
Signed-off-by: David S. Miller <davem@...emloft.net>
---
 drivers/net/dsa/mv88e6xxx/chip.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index 1fa1f820a437..12df00f593b7 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -4382,9 +4382,9 @@ static const void *pdata_device_get_match_data(struct device *dev)
 static int mv88e6xxx_probe(struct mdio_device *mdiodev)
 {
 	struct dsa_mv88e6xxx_pdata *pdata = mdiodev->dev.platform_data;
+	const struct mv88e6xxx_info *compat_info = NULL;
 	struct device *dev = &mdiodev->dev;
 	struct device_node *np = dev->of_node;
-	const struct mv88e6xxx_info *compat_info;
 	struct mv88e6xxx_chip *chip;
 	int port;
 	int err;
-- 
2.17.0