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net: phy: Fix verification of EEE support in phy_init_eee

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phy_init_eee uses phy_find_setting(phydev->speed, phydev->duplex)
to find a valid entry in the settings array for the given speed
and duplex value. For full duplex 1000baseT, this will return
the first matching entry, which is the entry for 1000baseKX_Full.

If the phy eee does not support 1000baseKX_Full, this entry will not
match, causing phy_init_eee to fail for no good reason.

Fixes: 9a9c56cb34 ("net: phy: fix a bug when verify the EEE support")
Fixes: 3e7077067e ("phy: Expand phy speed/duplex settings array")
Cc: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Guenter Roeck 2015-02-17 09:36:22 -08:00 committed by David S. Miller
parent fba04a9e0c
commit 54da5a8be3
1 changed files with 20 additions and 3 deletions
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23
drivers/net/phy/phy.c
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@ -235,6 +235,25 @@ static inline unsigned int phy_find_valid(unsigned int idx, u32 features)
return idx < MAX_NUM_SETTINGS ? idx : MAX_NUM_SETTINGS - 1;
}
/**
* phy_check_valid - check if there is a valid PHY setting which matches
* speed, duplex, and feature mask
* @speed: speed to match
* @duplex: duplex to match
* @features: A mask of the valid settings
*
* Description: Returns true if there is a valid setting, false otherwise.
*/
static inline bool phy_check_valid(int speed, int duplex, u32 features)
{
unsigned int idx;
idx = phy_find_valid(phy_find_setting(speed, duplex), features);
return settings[idx].speed == speed && settings[idx].duplex == duplex &&
(settings[idx].setting & features);
}
/**
* phy_sanitize_settings - make sure the PHY is set to supported speed and duplex
* @phydev: the target phy_device struct
@ -1045,7 +1064,6 @@ int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable)
int eee_lp, eee_cap, eee_adv;
u32 lp, cap, adv;
int status;
unsigned int idx;
/* Read phy status to properly get the right settings */
status = phy_read_status(phydev);
@ -1077,8 +1095,7 @@ int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable)
adv = mmd_eee_adv_to_ethtool_adv_t(eee_adv);
lp = mmd_eee_adv_to_ethtool_adv_t(eee_lp);
idx = phy_find_setting(phydev->speed, phydev->duplex);
if (!(lp & adv & settings[idx].setting))
if (!phy_check_valid(phydev->speed, phydev->duplex, lp & adv))
goto eee_exit_err;
if (clk_stop_enable) {