Re: [PATCH 20/28] net: bcm63xx: avoid referencing uninitialized variable

[David Miller]

From: Arnd Bergmann 
Date: Tue, 18 Oct 2016 00:16:08 +0200

> gcc found a reference to an uninitialized variable in the error handling
> of bcm_enet_open, introduced by a recent cleanup:
> 
> drivers/net/ethernet/broadcom/bcm63xx_enet.c: In function 'bcm_enet_open'
> drivers/net/ethernet/broadcom/bcm63xx_enet.c:1129:2: warning: 'phydev' may be 
> used uninitialized in this function [-Wmaybe-uninitialized]
> 
> This makes the use of that variable conditional, so we only reference it
> here after it has been used before. Unlike my normal patches, I have not
> build-tested this one, as I don't currently have mips test in my
> randconfig setup.
> 
> Fixes: 625eb8667d6f ("net: ethernet: broadcom: bcm63xx: use phydev from 
> struct net_device")
> Cc: Philippe Reynes 
> Reported-by: kbuild test robot 
> Signed-off-by: Arnd Bergmann 

Applied.

[PATCH 20/28] net: bcm63xx: avoid referencing uninitialized variable

[Arnd Bergmann]

gcc found a reference to an uninitialized variable in the error handling
of bcm_enet_open, introduced by a recent cleanup:

drivers/net/ethernet/broadcom/bcm63xx_enet.c: In function 'bcm_enet_open'
drivers/net/ethernet/broadcom/bcm63xx_enet.c:1129:2: warning: 'phydev' may be 
used uninitialized in this function [-Wmaybe-uninitialized]

This makes the use of that variable conditional, so we only reference it
here after it has been used before. Unlike my normal patches, I have not
build-tested this one, as I don't currently have mips test in my
randconfig setup.

Fixes: 625eb8667d6f ("net: ethernet: broadcom: bcm63xx: use phydev from struct 
net_device")
Cc: Philippe Reynes 
Reported-by: kbuild test robot 
Signed-off-by: Arnd Bergmann 
---
 drivers/net/ethernet/broadcom/bcm63xx_enet.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/broadcom/bcm63xx_enet.c 
b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
index ae364c7..5370909 100644
--- a/drivers/net/ethernet/broadcom/bcm63xx_enet.c
+++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
@@ -1126,7 +1126,8 @@ static int bcm_enet_open(struct net_device *dev)
free_irq(dev->irq, dev);
 
 out_phy_disconnect:
-   phy_disconnect(phydev);
+   if (priv->has_phy)
+   phy_disconnect(phydev);
 
return ret;
 }
-- 
2.9.0