linux-kernel - Re: [PATCH REPOST v4 5/7] ixgbevf: keep writel() closer to wmb()

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Date:   Wed, 21 Mar 2018 18:14:52 -0400
From:   okaya@...eaurora.org
To:     David Miller <davem@...emloft.net>
Cc:     jeffrey.t.kirsher@...el.com, netdev@...r.kernel.org,
        timur@...eaurora.org, sulrich@...eaurora.org,
        linux-arm-msm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        intel-wired-lan@...ts.osuosl.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH REPOST v4 5/7] ixgbevf: keep writel() closer to wmb()

On 2018-03-21 17:54, David Miller wrote:
> From: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
> Date: Wed, 21 Mar 2018 14:48:08 -0700
> 
>> On Wed, 2018-03-21 at 14:56 -0400, Sinan Kaya wrote:
>>> Remove ixgbevf_write_tail() in favor of moving writel() close to
>>> wmb().
>>> 
>>> Signed-off-by: Sinan Kaya <okaya@...eaurora.org>
>>> Reviewed-by: Alexander Duyck <alexander.h.duyck@...el.com>
>>> ---
>>>  drivers/net/ethernet/intel/ixgbevf/ixgbevf.h      | 5 -----
>>>  drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c | 4 ++--
>>>  2 files changed, 2 insertions(+), 7 deletions(-)
>> 
>> This patch fails to compile because there is a call to
>> ixgbevf_write_tail() which you missed cleaning up.
> 
> For a change with delicate side effects, it doesn't create much
> confidence if the code does not even compile.
> 
> Sinan, please put more care into the changes you are making.

I think the issue is the tree that code is getting tested has 
undelivered code as Alex mentioned.

I was using linux-next 4.16 rc4 for testing.

I will rebase to Jeff's tree.

> 
> Thank you.