diff options
| author |   Guenter Roeck <linux@roeck-us.net> | 2015-08-26 20:27:05 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2015-08-27 14:24:46 -0700 |
| commit | 31cb5c9e69cedd4bdd7bb7b442582914ceae8c2b (patch) | |
| tree | 5fd75864e5ddf1503875896350810f0d9949b2fc /drivers | |
| parent | device property: Return -ENXIO if there is no suitable FW interface (diff) | |
| download | linux-dev-31cb5c9e69cedd4bdd7bb7b442582914ceae8c2b.tar.xz linux-dev-31cb5c9e69cedd4bdd7bb7b442582914ceae8c2b.zip | |
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')
| -rw-r--r-- | drivers/net/ethernet/smsc/smsc911x.c | 14 |
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; |