From: Luis Henriques <luis.henriques@canonical•com>
To: David Miller <davem@davemloft•net>
Cc: nhorman@tuxdriver•com, netdev@vger•kernel.org,
jcliburn@gmail•com, stable@vger•kernel.org
Subject: Re: [net PATCH] atl1c: Fix misuse of netdev_alloc_skb in refilling rx ring
Date: Sat, 27 Jul 2013 17:25:17 +0100 [thread overview]
Message-ID: <87hafgrmvm.fsf@canonical.com> (raw)
In-Reply-To: <20130726.155618.987909338861687509.davem@davemloft.net> (David Miller's message of "Fri, 26 Jul 2013 15:56:18 -0700 (PDT)")
David Miller <davem@davemloft•net> writes:
> From: Neil Horman <nhorman@tuxdriver•com>
> Date: Fri, 26 Jul 2013 13:02:51 -0400
>
>> On Fri, Jul 26, 2013 at 05:56:16PM +0100, Luis Henriques wrote:
>>> Neil Horman <nhorman@tuxdriver•com> writes:
>>>
>>> > atl1c uses netdev_alloc_skb to refill its rx dma ring, but that call makes no
>>> > guarantees about the suitability of the memory for use in DMA. As a result
>>> > we've gotten reports of atl1c drivers occasionally hanging and needing to be
>>> > reset:
>>> > https://bugzilla.kernel.org/show_bug.cgi?id=54021
>>> >
>>> > Fix this by modifying the call to use the internal version __netdev_alloc_skb,
>>> > where you can set the gfp_mask explicitly to include GFP_DMA.
>>> >
>>> > Tested by two reporters in the above bug, who have the hardware to validate it.
>>> > Both report immediate cessation of the problem with this patch
>>> >
>>> > Signed-off-by: Neil Horman <nhorman@tuxdriver•com>
>>> > CC: Jay Cliburn <jcliburn@gmail•com>
>>> > CC: "David S. Miller" <davem@davemloft•net>
>>> > CC: stable@vger•kernel.org
>>> > Tested-by: Luis Henrix <luis.henrix@gmail•com>
>>>
>>> Thanks Neil!
>>>
>>> Would it be possible for you to update my name and email? (I've just
>>> updated my bz account to remove my gmail account address -- I thought
>>> I had done this ages ago.)
>>>
>>> Tested-by: Luis Henriques <luis.henriques@canonical•com>
>>>
>> I'm sure if Dave has time, he will square that up.
>
> I took care of this while applying Neil's patch, thanks.
Thanks!
Cheers,
--
Luis
next prev parent reply other threads:[~2013-07-27 16:25 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-26 16:47 [net PATCH] atl1c: Fix misuse of netdev_alloc_skb in refilling rx ring Neil Horman
2013-07-26 16:56 ` Luis Henriques
2013-07-26 17:02 ` Neil Horman
2013-07-26 22:56 ` David Miller
2013-07-27 16:25 ` Luis Henriques [this message]
2013-07-27 0:02 ` Ben Hutchings
2013-07-27 0:24 ` Ben Hutchings
2013-07-27 19:30 ` Luis Henriques
2013-07-27 19:49 ` Eric Dumazet
2013-07-27 21:30 ` Ben Hutchings
2013-07-27 23:59 ` Eric Dumazet
2013-07-28 3:02 ` David Miller
2013-07-28 10:44 ` Neil Horman
2013-07-28 16:15 ` Eric Dumazet
2013-07-28 18:53 ` Neil Horman
2013-07-28 19:21 ` Eric Dumazet
2013-07-28 20:08 ` Eric Dumazet
2013-07-28 20:22 ` Ben Hutchings
2013-07-28 23:01 ` Eric Dumazet
2013-07-28 23:20 ` Eric Dumazet
2013-07-28 23:25 ` Eric Dumazet
2013-07-28 23:38 ` Neil Horman
2013-07-29 0:07 ` Ben Hutchings
2013-07-29 0:21 ` David Miller
2013-07-29 0:26 ` Eric Dumazet
2013-07-29 9:55 ` Luis Henriques
2013-07-29 10:57 ` Eric Dumazet
2013-07-29 12:09 ` Luis Henriques
2013-07-29 15:30 ` Eric Dumazet
2013-07-29 17:24 ` Eric Dumazet
2013-07-30 8:53 ` Luis Henriques
2013-07-31 2:11 ` David Miller
2013-07-31 17:48 ` Benjamin Poirier
2013-07-31 17:56 ` Eric Dumazet
2013-07-31 19:01 ` David Miller
2013-08-01 1:57 ` Eric Dumazet
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