From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751725AbbHQUps (ORCPT ); Mon, 17 Aug 2015 16:45:48 -0400 Received: from bh-25.webhostbox.net ([208.91.199.152]:47901 "EHLO bh-25.webhostbox.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751084AbbHQUpq (ORCPT ); Mon, 17 Aug 2015 16:45:46 -0400 From: Guenter Roeck To: Steve Glendinning Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Guenter Roeck , Jeremy Linton Subject: [PATCH -next] smsc911x: Fix crash seen if neither ACPI nor OF is configured or used Date: Mon, 17 Aug 2015 13:45:36 -0700 Message-Id: <1439844336-21596-1-git-send-email-linux@roeck-us.net> X-Mailer: git-send-email 2.1.4 X-Authenticated_sender: guenter@roeck-us.net X-OutGoing-Spam-Status: No, score=-1.0 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - bh-25.webhostbox.net X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - roeck-us.net X-Get-Message-Sender-Via: bh-25.webhostbox.net: authenticated_id: guenter@roeck-us.net X-Source: X-Source-Args: X-Source-Dir: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit 0b50dc4fc971 ("Convert smsc911x to use ACPI as well as DT") makes the call to smsc911x_probe_config() unconditional, and no longer fails if there is no device node. device_get_phy_mode() is called unconditionally, and if there is no phy node configured returns an error code. This error code is assigned to phy_interface, and interpreted elsewhere in the code as valid phy mode. This in turn causes qemu to crash when running a variant of realview_pb_defconfig. qemu: hardware error: lan9118_read: Bad reg 0x86 Fixes: 0b50dc4fc971 ("Convert smsc911x to use ACPI as well as DT") Cc: Jeremy Linton Cc Graeme Gregory Signed-off-by: Guenter Roeck --- drivers/net/ethernet/smsc/smsc911x.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/smsc/smsc911x.c b/drivers/net/ethernet/smsc/smsc911x.c index 0f21aa3bb537..34f97684506b 100644 --- a/drivers/net/ethernet/smsc/smsc911x.c +++ b/drivers/net/ethernet/smsc/smsc911x.c @@ -2367,12 +2367,17 @@ static const struct smsc911x_ops shifted_smsc911x_ops = { static int smsc911x_probe_config(struct smsc911x_platform_config *config, struct device *dev) { + int phy_interface; u32 width = 0; if (!dev) return -ENODEV; - config->phy_interface = device_get_phy_mode(dev); + phy_interface = device_get_phy_mode(dev); + if (phy_interface < 0) + return phy_interface; + + config->phy_interface = phy_interface; device_get_mac_address(dev, config->mac, ETH_ALEN); -- 2.1.4