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authorFelix Fietkau <nbd@nbd.name>2017-02-06 11:46:48 +0100
committerFelix Fietkau <nbd@nbd.name>2017-02-16 17:17:15 +0100
commit2bf9ea6a31736db059aa97addce3a34b933dacc1 (patch)
treeecfe628aabaf38e6bd40ca841443d19079105a83 /target/linux/mvebu/patches-4.9/403-net-phy-avoid-setting-unsupported-EEE-advertisments.patch
parent237454991618e0e8b7ceb8a8a2a43fca12c1a454 (diff)
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mvebu: add linux 4.9 support
Signed-off-by: Felix Fietkau <nbd@nbd.name> Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Diffstat (limited to 'target/linux/mvebu/patches-4.9/403-net-phy-avoid-setting-unsupported-EEE-advertisments.patch')
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diff --git a/target/linux/mvebu/patches-4.9/403-net-phy-avoid-setting-unsupported-EEE-advertisments.patch b/target/linux/mvebu/patches-4.9/403-net-phy-avoid-setting-unsupported-EEE-advertisments.patch
new file mode 100644
index 0000000000..35479007d0
--- /dev/null
+++ b/target/linux/mvebu/patches-4.9/403-net-phy-avoid-setting-unsupported-EEE-advertisments.patch
@@ -0,0 +1,52 @@
+From: Russell King <rmk+kernel@armlinux.org.uk>
+Date: Wed, 4 Jan 2017 21:00:51 +0000
+Subject: [PATCH] net: phy: avoid setting unsupported EEE advertisments
+
+We currently allow userspace to set any EEE advertisments it desires,
+whether or not the PHY supports them. For example:
+
+ # ethtool --set-eee eth1 advertise 0xffffffff
+ # ethtool --show-eee eth1
+ EEE Settings for eth1:
+ EEE status: disabled
+ Tx LPI: disabled
+ Supported EEE link modes: 100baseT/Full
+ 1000baseT/Full
+ 10000baseT/Full
+ Advertised EEE link modes: 100baseT/Full
+ 1000baseT/Full
+ 1000baseKX/Full
+ 10000baseT/Full
+ 10000baseKX4/Full
+ 10000baseKR/Full
+
+Clearly, this is not sane, we should only allow link modes that are
+supported to be advertised (as we do elsewhere.) Ensure that we mask
+the MDIO_AN_EEE_ADV value with the capabilities retrieved from the
+MDIO_PCS_EEE_ABLE register.
+
+Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
+---
+
+--- a/drivers/net/phy/phy.c
++++ b/drivers/net/phy/phy.c
+@@ -1307,11 +1307,16 @@ EXPORT_SYMBOL(phy_ethtool_get_eee);
+ */
+ int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data)
+ {
+- int val = ethtool_adv_to_mmd_eee_adv_t(data->advertised);
++ int cap, adv;
+
+- phy_write_mmd_indirect(phydev, MDIO_AN_EEE_ADV, MDIO_MMD_AN, val);
++ /* Get Supported EEE */
++ cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
++ if (cap < 0)
++ return cap;
+
+- return 0;
++ adv = ethtool_adv_to_mmd_eee_adv_t(data->advertised) & cap;
++
++ return phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, adv);
+ }
+ EXPORT_SYMBOL(phy_ethtool_set_eee);
+