From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tony Lindgren Subject: Re: [PATCH -next] smsc911x: Fix crash seen if neither ACPI nor OF is configured or used Date: Wed, 26 Aug 2015 10:04:10 -0700 Message-ID: <20150826170410.GP4215@atomide.com> References: <1439844336-21596-1-git-send-email-linux@roeck-us.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Steve Glendinning , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Jeremy Linton , linux-omap@vger.kernel.org To: Guenter Roeck Return-path: Content-Disposition: inline In-Reply-To: <1439844336-21596-1-git-send-email-linux@roeck-us.net> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org Hi, * Guenter Roeck [150817 13:48]: > 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); Looks like this change makes at least omap boards using smsc911x fail with -22 for me in Linux next. Do any of the the device tree configured smsc911x devices actually have a phy configured? Regards, Tony