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| author | Bruce Allan <bruce.w.allan@intel.com> | 2009-10-26 11:22:47 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-10-26 16:16:18 -0700 |
| commit | db2932ecf8dc07f65b410e921f96c5c51170c0ae (patch) | |
| tree | b98ee7bcf484dfa04d1906aae860bba21b2a6396 | |
| parent | 39305965f31e080d6ed96e0ff51ed11e7639d52e (diff) | |
| download | linux-db2932ecf8dc07f65b410e921f96c5c51170c0ae.tar.gz linux-db2932ecf8dc07f65b410e921f96c5c51170c0ae.tar.bz2 linux-db2932ecf8dc07f65b410e921f96c5c51170c0ae.zip | |
e1000e: clear PHY wakeup bit after LCD reset on 82577/82578
Performing a dummy read of the PHY Wakeup Control (WUC) register clears the
wakeup enable bit set by an PHY reset. If this bit remains set, link
problems may occur.
Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/e1000e/ich8lan.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/net/e1000e/ich8lan.c b/drivers/net/e1000e/ich8lan.c index aa0ab0eb8c7d..ead66510e22f 100644 --- a/drivers/net/e1000e/ich8lan.c +++ b/drivers/net/e1000e/ich8lan.c @@ -844,7 +844,7 @@ static s32 e1000_phy_hw_reset_ich8lan(struct e1000_hw *hw) u32 i; u32 data, cnf_size, cnf_base_addr, sw_cfg_mask; s32 ret_val; - u16 word_addr, reg_data, reg_addr, phy_page = 0; + u16 reg, word_addr, reg_data, reg_addr, phy_page = 0; ret_val = e1000e_phy_hw_reset_generic(hw); if (ret_val) @@ -859,6 +859,10 @@ static s32 e1000_phy_hw_reset_ich8lan(struct e1000_hw *hw) return ret_val; } + /* Dummy read to clear the phy wakeup bit after lcd reset */ + if (hw->mac.type == e1000_pchlan) + e1e_rphy(hw, BM_WUC, ®); + /* * Initialize the PHY from the NVM on ICH platforms. This * is needed due to an issue where the NVM configuration is @@ -2229,6 +2233,7 @@ static s32 e1000_get_bus_info_ich8lan(struct e1000_hw *hw) **/ static s32 e1000_reset_hw_ich8lan(struct e1000_hw *hw) { + u16 reg; u32 ctrl, icr, kab; s32 ret_val; @@ -2304,6 +2309,9 @@ static s32 e1000_reset_hw_ich8lan(struct e1000_hw *hw) hw_dbg(hw, "Auto Read Done did not complete\n"); } } + /* Dummy read to clear the phy wakeup bit after lcd reset */ + if (hw->mac.type == e1000_pchlan) + e1e_rphy(hw, BM_WUC, ®); /* * For PCH, this write will make sure that any noise |