niu: fix warnings in drivers/net/niu.c

these warnings:

  drivers/net/niu.c: In function ‘serdes_init_niu_1g_serdes’:
  drivers/net/niu.c:451: warning: ‘sig’ may be used uninitialized in this function
  drivers/net/niu.c: In function ‘serdes_init_niu_10g_serdes’:
  drivers/net/niu.c:550: warning: ‘sig’ may be used uninitialized in this function

triggers because GCC does not recognize that the max_retry loop
always initializes 'sig', due to max_retry != 0.

Annotate them.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/niu.c b/drivers/net/niu.c
index f368e74..5b7b31d 100644 (file)
--- a/drivers/net/niu.c
+++ b/drivers/net/niu.c
@@ -448,7 +448,7 @@ static int serdes_init_niu_1g_serdes(struct niu *np)
        struct niu_link_config *lp = &np->link_config;
        u16 pll_cfg, pll_sts;
        int max_retry = 100;
-       u64 sig, mask, val;
+       u64 uninitialized_var(sig), mask, val;
        u32 tx_cfg, rx_cfg;
        unsigned long i;
        int err;
@@ -547,7 +547,7 @@ static int serdes_init_niu_10g_serdes(struct niu *np)
        struct niu_link_config *lp = &np->link_config;
        u32 tx_cfg, rx_cfg, pll_cfg, pll_sts;
        int max_retry = 100;
-       u64 sig, mask, val;
+       u64 uninitialized_var(sig), mask, val;
        unsigned long i;
        int err;