From: Tom Rix <trix@redhat.com>
Date: Fri, 3 Jul 2020 13:33:59 +0000 (-0700)
Subject: net: sky2: initialize return of gm_phy_read
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=28b18e4eb515af7c6661c3995c6e3c34412c2874;p=linux.git

net: sky2: initialize return of gm_phy_read

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 <trix@redhat.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/ethernet/marvell/sky2.c b/drivers/net/ethernet/marvell/sky2.c
index 241f007169797..fe54764caea9c 100644
--- a/drivers/net/ethernet/marvell/sky2.c
+++ b/drivers/net/ethernet/marvell/sky2.c
@@ -203,7 +203,7 @@ 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;
 }