netdev - Re: WoL broken in r8169.c since kernel 4.19

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Message-ID: <20190129153553.GL27062@torres.zugschlus.de>
Date:   Tue, 29 Jan 2019 16:35:53 +0100
From:   Marc Haber <mh+netdev@...schlus.de>
To:     Heiner Kallweit <hkallweit1@...il.com>
Cc:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: WoL broken in r8169.c since kernel 4.19

Hi,

after having a good night's sleep over that, it's obviously a merge
commit which cannot easily be reverted. How would I continue after
identifying a merge commit as the culprit?

On Tue, Jan 29, 2019 at 08:32:53AM +0100, Marc Haber wrote:
> According to bisect, the first bad commit is
> 19725496da5602b401eae389736ab00d1817e264
> 
> commit 19725496da5602b401eae389736ab00d1817e264
> Merge: aea5f654e6b7 9981b4fb8684

git diff aea5f654e6b7..19725496da5602b401eae389736ab00d1817e264,
filtered for r8169 looks manageable:

--- a/drivers/net/ethernet/realtek/r8169.c
+++ b/drivers/net/ethernet/realtek/r8169.c
@@ -7396,8 +7396,7 @@ static int rtl_init_one(struct pci_dev *pdev, const struc
                return rc;
        }
 
-       /* override BIOS settings, use userspace tools to enable WOL */
-       __rtl8169_set_wol(tp, 0);
+       tp->saved_wolopts = __rtl8169_get_wol(tp);
 
        mutex_init(&tp->wk.mutex);
        u64_stats_init(&tp->rx_stats.syncp);

but the other one seems unmanageably big:

[18/5009]mh@fan:~/linux/git/linux (master % u=) $ git diff 9981b4fb8684..19725496da5602b401eae389736ab00d1817e264 -- drivers/net/ethernet/realtek/r8169.c | diffstat
 r8169.c |  815 ++++++++++++++++++----------------------------------------------
 1 file changed, 234 insertions(+), 581 deletions(-)
[19/5009]mh@fan:~/linux/git/linux (master % u=) $ 

-------
But, indeed, adding the call to __rtl8169_set_wol(tp, 0) fixes the issue
for me and the machine now wakes up from StR on a magic packet without
having to go through strange ethtool motions.
-------

Would that code change be suitable for the official kernel cod?

Greetings
Marc

-- 
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