lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Wed, 26 Aug 2015 20:27:05 -0700 From: Guenter Roeck <linux@...ck-us.net> To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Steve Glendinning <steve.glendinning@...well.net> Cc: linux-kernel@...r.kernel.org, netdev@...r.kernel.org, "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>, Jeremy Linton <jeremy.linton@....com>, tony@...mide.com, Guenter Roeck <linux@...ck-us.net> Subject: [PATCH -next v3 2/2] 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@...mide.com> Signed-off-by: Guenter Roeck <linux@...ck-us.net> --- v2: Dropped RFC Removed check for -ENODATA Depends on patch 1/2 v3: Added Tony's Tested-by: Tested with non-devicetree and devicetree configurations. Should be tested with ACPI configuration. drivers/net/ethernet/smsc/smsc911x.c | 14 ++++++++------ 1 file 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; -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Powered by blists - more mailing lists