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authorGuenter Roeck <linux@roeck-us.net>2015-08-27 06:27:05 +0300
committerDavid S. Miller <davem@davemloft.net>2015-08-28 00:24:46 +0300
commit31cb5c9e69cedd4bdd7bb7b442582914ceae8c2b (patch)
tree5fd75864e5ddf1503875896350810f0d9949b2fc /drivers/net/ethernet/smsc
parent4fa7508e9f1c64ae39516e40ee5495aaa4616ad7 (diff)
downloadlinux-31cb5c9e69cedd4bdd7bb7b442582914ceae8c2b.tar.xz
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 <tony@atomide.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/smsc')
-rw-r--r--drivers/net/ethernet/smsc/smsc911x.c14
1 files changed, 8 insertions, 6 deletions
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;