linux-kernel - Re: [PATCH] net: apm: xgene: force XGene enet driver to re-balance IRQ usage

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Message-ID: <0e0f3aa6-9b6e-edd5-226f-2e23de9b5a0f@gmail.com>
Date:   Tue, 18 Sep 2018 17:03:52 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Eric Dumazet <eric.dumazet@...il.com>, ahs3@...hat.com,
        "Lendacky, Thomas" <Thomas.Lendacky@....com>,
        David Miller <davem@...emloft.net>
Cc:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "isubramanian@....com" <isubramanian@....com>,
        "kchudgar@....com" <kchudgar@....com>,
        "qnguyen@....com" <qnguyen@....com>
Subject: Re: [PATCH] net: apm: xgene: force XGene enet driver to re-balance
 IRQ usage

On 09/18/2018 04:56 PM, Eric Dumazet wrote:
> 
> 
> On 09/18/2018 04:27 PM, Eric Dumazet wrote:
>>
> 
>> I remember one of the napi_complete_done() change had to be reverted,
>> for some obscure reason.
> 
> 
> 
> That was not exactly a revert,  :

This is what I have so far for the drivers that both use
napi_complete_done() without checking the return value and implement a
ndo_poll_controller() callback:

https://github.com/ffainelli/linux/commits/napi-check

> 
> commit 129c6cda2de2a8ac44fab096152469999b727faf
> Author: Eric Dumazet <edumazet@...gle.com>
> Date:   Mon Sep 18 13:03:43 2017 -0700
> 
>     8139too: revisit napi_complete_done() usage
>     
>     It seems we have to be more careful in napi_complete_done()
>     use. This patch is not a revert, as it seems we can
>     avoid bug that Ville reported by moving the napi_complete_done()
>     test in the spinlock section.
>     
>     Many thanks to Ville for detective work and all tests.
>     
>     Fixes: 617f01211baf ("8139too: use napi_complete_done()")
>     Reported-by: Ville Syrjälä <ville.syrjala@...ux.intel.com>
>     Tested-by: Ville Syrjälä <ville.syrjala@...ux.intel.com>
>     
>     Signed-off-by: David S. Miller <davem@...emloft.net>
> 
> 
> 
> 
>      
> 


-- 
Florian