* [PATCH 3/3] bcm63xx_enet: avoid uninitialized variable warning
[not found] <20170118145306.1004008-1-arnd@arndb.de>
@ 2017-01-18 14:52 ` Arnd Bergmann
2017-01-20 16:46 ` David Miller
0 siblings, 1 reply; 2+ messages in thread
From: Arnd Bergmann @ 2017-01-18 14:52 UTC (permalink / raw)
To: linux-arm-kernel
gcc-7 and probably earlier versions get confused by this function
and print a harmless warning:
drivers/net/ethernet/broadcom/bcm63xx_enet.c: In function 'bcm_enet_open':
drivers/net/ethernet/broadcom/bcm63xx_enet.c:1130:3: error: 'phydev' may be used uninitialized in this function [-Werror=maybe-uninitialized]
This adds an initialization for the 'phydev' variable when it is unused
and changes the check to test for that NULL pointer to make it clear
that we always pass a valid pointer here.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
drivers/net/ethernet/broadcom/bcm63xx_enet.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/broadcom/bcm63xx_enet.c b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
index 1ad904680ca6..f0a0bcb31b7e 100644
--- a/drivers/net/ethernet/broadcom/bcm63xx_enet.c
+++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
@@ -913,6 +913,8 @@ static int bcm_enet_open(struct net_device *dev)
priv->old_link = 0;
priv->old_duplex = -1;
priv->old_pause = -1;
+ } else {
+ phydev = NULL;
}
/* mask all interrupts and request them */
@@ -1083,7 +1085,7 @@ static int bcm_enet_open(struct net_device *dev)
enet_dmac_writel(priv, priv->dma_chan_int_mask,
ENETDMAC_IRMASK, priv->tx_chan);
- if (priv->has_phy)
+ if (phydev)
phy_start(phydev);
else
bcm_enet_adjust_link(dev);
@@ -1126,7 +1128,7 @@ static int bcm_enet_open(struct net_device *dev)
free_irq(dev->irq, dev);
out_phy_disconnect:
- if (priv->has_phy)
+ if (phydev)
phy_disconnect(phydev);
return ret;
--
2.9.0
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