On 11/12/2013 05:57, Soren Brinkmann :
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 <[email protected]>
Signed-off-by: Soren Brinkmann <[email protected]>
Acked-by: Nicolas Ferre <[email protected]>
---
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);
--
Nicolas Ferre
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