Hello.

On 09/07/2015 09:15 PM, Alexey Brodkin wrote:

Current implementation via IS_ERR(phydev) may make no sense because
of_phy_attach() returns NULL on failure instead of error value.

Still for checking result of phy_connect() IS_ERR() is useful.

So adding explicit check for NULL.

Cc: Giuseppe Cavallaro <peppe.cavall...@st.com>
Cc: arc-linux-...@synopsys.com
Cc: linux-kernel@vger.kernel.org
Cc: sta...@vger.kernel.org
Cc: David Miller <da...@davemloft.net>
Signed-off-by: Alexey Brodkin <abrod...@synopsys.com>
---
  drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c 
b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 864b476..ad2ce3e 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -837,7 +837,7 @@ static int stmmac_init_phy(struct net_device *dev)
                                     interface);
        }

-       if (IS_ERR(phydev)) {
+       if (!phydev || IS_ERR(phydev)) {

   There's IS_ERR_OR_NULL().

WBR, Sergei

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