From 9319e47c18c41f2748c4140b0ac32097a56f36c1 Mon Sep 17 00:00:00 2001
From: Soren Brinkmann <soren.brinkmann@xilinx.com>
Date: Tue, 10 Dec 2013 20:57:57 -0800
Subject: [PATCH] net: macb: Fix build warning
When adjusting the link speed, the target frequency is determined by a
'swith (LINK_SPEED)' statement, that assigns the target rate only for
valid and expected LINK_SPEED values. This incomplete switch statement
leads to the following build warning:
drivers/net/ethernet/cadence/macb.c: In function 'macb_handle_link_change':
>> drivers/net/ethernet/cadence/macb.c:241:14: warning: 'rate' may be used uninitialized in this function [-Wmaybe-uninitialized]
netdev_warn(dev, "unable to generate target frequency: %ld Hz\n",
^
drivers/net/ethernet/cadence/macb.c:215:13: note: 'rate' was declared here
long ferr, rate, rate_rounded;
Fixing this by bailing out of that function in the switch's default case
before the rate variable is used.
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/ethernet/cadence/macb.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/cadence/macb.c b/drivers/net/ethernet/cadence/macb.c
index 419529a9309d..3190d38e16fb 100644
--- a/drivers/net/ethernet/cadence/macb.c
+++ b/drivers/net/ethernet/cadence/macb.c
@@ -225,7 +225,7 @@ static void macb_set_tx_clk(struct clk *clk, int speed, struct net_device *dev)
rate = 125000000;
break;
default:
- break;
+ return;
}
rate_rounded = clk_round_rate(clk, rate);
--
2.20.1