From: Guenter Roeck Date: Thu, 27 Aug 2015 03:27:05 +0000 (-0700) Subject: smsc911x: Ignore error return from device_get_phy_mode() X-Git-Tag: v4.3-rc1~96^2~68 X-Git-Url: https://git.kernelconcepts.de/?a=commitdiff_plain;h=31cb5c9e69cedd4bdd7bb7b442582914ceae8c2b;p=karo-tx-linux.git smsc911x: Ignore error return from device_get_phy_mode() Commit 62ee783bf1f8 ("smsc911x: Fix crash seen if neither ACPI nor OF is configured or used") introduces an error check for the return value from device_get_phy_mode() and bails out if there is an error. Unfortunately, there are configurations where no phy is configured. Those configurations now fail. To fix the problem, accept error returns from device_get_phy_mode(), and use the return value from device_property_read_u32() to determine if there is a suitable firmware interface to read the configuration. Fixes: 62ee783bf1f8 ("smsc911x: Fix crash seen if neither ACPI nor OF is configured or used") Tested-by: Tony Lindgren Signed-off-by: Guenter Roeck Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/smsc/smsc911x.c b/drivers/net/ethernet/smsc/smsc911x.c index 6eef3251d833..c8b26259c9cf 100644 --- a/drivers/net/ethernet/smsc/smsc911x.c +++ b/drivers/net/ethernet/smsc/smsc911x.c @@ -2369,23 +2369,25 @@ static int smsc911x_probe_config(struct smsc911x_platform_config *config, { int phy_interface; u32 width = 0; + int err; phy_interface = device_get_phy_mode(dev); if (phy_interface < 0) - return phy_interface; - + phy_interface = PHY_INTERFACE_MODE_NA; config->phy_interface = phy_interface; device_get_mac_address(dev, config->mac, ETH_ALEN); - device_property_read_u32(dev, "reg-shift", &config->shift); - - device_property_read_u32(dev, "reg-io-width", &width); - if (width == 4) + err = device_property_read_u32(dev, "reg-io-width", &width); + if (err == -ENXIO) + return err; + if (!err && width == 4) config->flags |= SMSC911X_USE_32BIT; else config->flags |= SMSC911X_USE_16BIT; + device_property_read_u32(dev, "reg-shift", &config->shift); + if (device_property_present(dev, "smsc,irq-active-high")) config->irq_polarity = SMSC911X_IRQ_POLARITY_ACTIVE_HIGH;