netdev - Re: [PATCH net 2/2] net/mlx4_en: Disbale GRO for incoming loopback/selftest packets

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Message-ID: <54F415A5.1020809@dev.mellanox.co.il>
Date:	Mon, 02 Mar 2015 09:47:49 +0200
From:	Ido Shamay <idos@....mellanox.co.il>
To:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
	Or Gerlitz <ogerlitz@...lanox.com>,
	"David S. Miller" <davem@...emloft.net>
CC:	netdev@...r.kernel.org, Amir Vadai <amirv@...lanox.com>,
	Tal Alon <talal@...lanox.com>
Subject: Re: [PATCH net 2/2] net/mlx4_en: Disbale GRO for incoming loopback/selftest
 packets

On 3/1/2015 7:24 PM, Sergei Shtylyov wrote:
> Hello.
>
> On 3/1/2015 5:56 PM, Or Gerlitz wrote:
>
>> From: Ido Shamay <idos@...lanox.com>
>
>> Packets which are sent from the selftest (ethtool) flow, should not
>> be passed to the GRO stack but rather dropped by the driver after
>> validation.
>> To achieve that, we disable GRO for the duration of the selftest.
>
>> Fixes: dd65beac48a5 ("net/mlx4_en: Extend usage of napi_gro_frags")
>> Reported-by: Carol Soto <clsoto@...ux.vnet.ibm.com>
>> Signed-off-by: Ido Shamay <idos@...lanox.com>
>> Signed-off-by: Or Gerlitz <ogerlitz@...lanox.com>
>> ---
>>   drivers/net/ethernet/mellanox/mlx4/en_selftest.c |    8 +++++++-
>>   1 files changed, 7 insertions(+), 1 deletions(-)
>
>> diff --git a/drivers/net/ethernet/mellanox/mlx4/en_selftest.c
>> b/drivers/net/ethernet/mellanox/mlx4/en_selftest.c
>> index 2d8ee66..ac8870c 100644
>> --- a/drivers/net/ethernet/mellanox/mlx4/en_selftest.c
>> +++ b/drivers/net/ethernet/mellanox/mlx4/en_selftest.c
>> @@ -81,12 +81,14 @@ static int mlx4_en_test_loopback(struct
>> mlx4_en_priv *priv)
>>   {
>>       u32 loopback_ok = 0;
>>       int i;
>> -
>> +    bool gro_enabled;
>>
>>           priv->loopback_ok = 0;
>>       priv->validate_loopback = 1;
>> +    gro_enabled = (priv->dev->features & NETIF_F_GRO);
>
>     Parens not necessary here.
>
Will be fixed in V1, thanks.
Any chance checkpatch can identify such cases?

> [...]
>
> WBR, Sergei
>
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