Messages in this thread Patch in this message | | | From | Arnd Bergmann <> | Subject | [PATCH 3/3] bcm63xx_enet: avoid uninitialized variable warning | Date | Wed, 18 Jan 2017 15:52:53 +0100 |
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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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