From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752187AbbIGSPR (ORCPT ); Mon, 7 Sep 2015 14:15:17 -0400 Received: from smtprelay4.synopsys.com ([198.182.47.9]:33624 "EHLO smtprelay.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750953AbbIGSPO (ORCPT ); Mon, 7 Sep 2015 14:15:14 -0400 From: Alexey Brodkin To: netdev@vger.kernel.org Cc: Alexey Brodkin , Giuseppe Cavallaro , arc-linux-dev@synopsys.com, linux-kernel@vger.kernel.org, stable@vger.kernel.org, David Miller Subject: [PATCH] stmmac: fix check for phydev being open Date: Mon, 7 Sep 2015 21:15:09 +0300 Message-Id: <1441649709-12325-1-git-send-email-abrodkin@synopsys.com> X-Mailer: git-send-email 2.4.3 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 Cc: arc-linux-dev@synopsys.com Cc: linux-kernel@vger.kernel.org Cc: stable@vger.kernel.org Cc: David Miller Signed-off-by: Alexey Brodkin --- 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)) { pr_err("%s: Could not attach to PHY\n", dev->name); return PTR_ERR(phydev); } -- 2.4.3