linux-kernel - Re: [PATCH 4.4 71/96] e1000e: Separate signaling for link check/link up

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Date:   Thu, 07 Dec 2017 20:02:59 +0000
From:   Ben Hutchings <ben.hutchings@...ethink.co.uk>
To:     Benjamin Poirier <bpoirier@...e.com>,
        Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Cc:     stable@...r.kernel.org,
        Lennart Sorensen <lsorense@...lub.uwaterloo.ca>,
        Aaron Brown <aaron.f.brown@...el.com>,
        Amit Pundir <amit.pundir@...aro.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 4.4 71/96] e1000e: Separate signaling for link
 check/link up

On Tue, 2017-11-28 at 11:23 +0100, Greg Kroah-Hartman wrote:
> 4.4-stable review patch.  If anyone has any objections, please let me know.
> 
> ------------------
> 
> From: Benjamin Poirier <bpoirier@...e.com>
> 
> commit 19110cfbb34d4af0cdfe14cd243f3b09dc95b013 upstream.
[...]
> --- a/drivers/net/ethernet/intel/e1000e/mac.c
> +++ b/drivers/net/ethernet/intel/e1000e/mac.c
> @@ -410,6 +410,9 @@ void e1000e_clear_hw_cntrs_base(struct e
>   *  Checks to see of the link status of the hardware has changed.  If a
>   *  change in link status has been detected, then we read the PHY registers
>   *  to get the current speed/duplex if link exists.
> + *
> + *  Returns a negative error code (-E1000_ERR_*) or 0 (link down) or 1 (link
> + *  up).
>   **/
>  s32 e1000e_check_for_copper_link(struct e1000_hw *hw)
>  {
[...]
> --- a/drivers/net/ethernet/intel/e1000e/netdev.c
> +++ b/drivers/net/ethernet/intel/e1000e/netdev.c
> @@ -5017,7 +5017,7 @@ static bool e1000e_has_link(struct e1000
> >  	case e1000_media_type_copper:
> >  		if (hw->mac.get_link_status) {
> >  			ret_val = hw->mac.ops.check_for_link(hw);
> > -			link_active = !hw->mac.get_link_status;
> > +			link_active = ret_val > 0;
> >  		} else {
> >  			link_active = true;
> >  		}

As this change in e1000e_has_link() is conditional only on the media
type, doesn't e1000_check_for_copper_link_ich8lan() also need to be
changed to return 1 for link up?

Ben.

-- 
Ben Hutchings
Software Developer, Codethink Ltd.