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authorGuenter Roeck <linux@roeck-us.net>2015-08-17 13:45:36 -0700
committerDavid S. Miller <davem@davemloft.net>2015-08-17 14:06:16 -0700
commit62ee783bf1f872ba879e088a669b04afebee899b (patch)
tree98fcd45c8e6c0e382f7a6961f9c8808994a1484a /drivers/net/ethernet/smsc
parentc87acb2558db7a870575dd8e14ded2e5acbdc295 (diff)
smsc911x: Fix crash seen if neither ACPI nor OF is configured or used
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 <jeremy.linton@arm.com> Cc Graeme Gregory <graeme.gregory@linaro.org> 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.c7
1 files changed, 6 insertions, 1 deletions
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);