Messages in this thread Patch in this message | | | From | Soren Brinkmann <> | Subject | [PATCH] net: macb: Fix build warning | Date | Tue, 10 Dec 2013 20:57:57 -0800 |
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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> --- 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); -- 1.8.5.1
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