[PATCH 4.4 07/54] net: sky2: initialize return of gm_phy_read

[Greg Kroah-Hartman]

From: Tom Rix <t...@redhat.com>

[ Upstream commit 28b18e4eb515af7c6661c3995c6e3c34412c2874 ]

clang static analysis flags this garbage return

drivers/net/ethernet/marvell/sky2.c:208:2: warning: Undefined or garbage value 
returned to caller [core.uninitialized.UndefReturn]
        return v;
        ^~~~~~~~

static inline u16 gm_phy_read( ...
{
        u16 v;
        __gm_phy_read(hw, port, reg, &v);
        return v;
}

__gm_phy_read can return without setting v.

So handle similar to skge.c's gm_phy_read, initialize v.

Signed-off-by: Tom Rix <t...@redhat.com>
Reviewed-by: Andrew Lunn <and...@lunn.ch>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
 drivers/net/ethernet/marvell/sky2.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/marvell/sky2.c 
b/drivers/net/ethernet/marvell/sky2.c
index 8ba9eadc20791..3fb9cbdac3bf0 100644
--- a/drivers/net/ethernet/marvell/sky2.c
+++ b/drivers/net/ethernet/marvell/sky2.c
@@ -215,7 +215,7 @@ io_error:
 
 static inline u16 gm_phy_read(struct sky2_hw *hw, unsigned port, u16 reg)
 {
-       u16 v;
+       u16 v = 0;
        __gm_phy_read(hw, port, reg, &v);
        return v;
 }
-- 
2.25.1