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SubjectRe: [Intel-wired-lan] e1000e: PHY cann't be initialized correctly on some I218 controllers
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On 8/1/2016 15:28, Denis Turischev wrote:
> There is an error "e1000e: probe of 0000:00:19.0 failed with error -3"
> that can be observed after power-on on some I218 controllers.
> Hardware reset and re-initialization fixes the issue.
>
> Signed-off-by: Denis Turischev <denis.turischev@compulab.co.il>
>
> diff -Nru linux-4.7.orig/drivers/net/ethernet/intel/e1000e/ich8lan.c linux-4.7/drivers/net/ethernet/intel/e1000e/ich8lan.c
> --- linux-4.7.orig/drivers/net/ethernet/intel/e1000e/ich8lan.c 2016-07-24 22:23:50.000000000 +0300
> +++ linux-4.7/drivers/net/ethernet/intel/e1000e/ich8lan.c 2016-08-01 13:59:08.046563095 +0300
> @@ -155,6 +155,7 @@
> static s32 e1000_disable_ulp_lpt_lp(struct e1000_hw *hw, bool force);
> static s32 e1000_setup_copper_link_pch_lpt(struct e1000_hw *hw);
> static s32 e1000_oem_bits_config_ich8lan(struct e1000_hw *hw, bool d0_state);
> +static s32 e1000_reset_hw_ich8lan(struct e1000_hw *hw);
>
> static inline u16 __er16flash(struct e1000_hw *hw, unsigned long reg)
> {
> @@ -459,8 +460,12 @@
> phy->id = e1000_phy_unknown;
>
> ret_val = e1000_init_phy_workarounds_pchlan(hw);
> - if (ret_val)
> - return ret_val;
> + if (ret_val) {
> + e1000_reset_hw_ich8lan(hw);
> + ret_val = e1000_init_phy_workarounds_pchlan(hw);
> + if (ret_val)
> + return ret_val;
> + }
>
> if (phy->id == e1000_phy_unknown)
> switch (hw->mac.type) {
> _______________________________________________
> Intel-wired-lan mailing list
> Intel-wired-lan@lists.osuosl.org
> http://lists.osuosl.org/mailman/listinfo/intel-wired-lan
>

It is hard to determine what is exactly the problem here and what causes
the -3 error, but this is not the place to perform hw reset and retry to
init the phy.
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