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Re: [ath9k-devel] [RFC] ath9k: Insert wmb before linking dma descriptors

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On 2010-10-29 1:36 AM, Ben Greear wrote:
> On 10/09/2010 08:23 AM, Felix Fietkau wrote:
>> On 2010-10-09 5:19 PM, Björn Smedman wrote:
>>> On Tue, Oct 5, 2010 at 9:50 PM, Luis R. Rodriguez
>>> <lrodriguez@xxxxxxxxxxx>  wrote:
>>>> Felix is more familiar with this area so I'll let him chime with
>>>> his ACK/NACK.
>>>>
>>>>   Luis
>>>
>>> So Felix, what do you think? I realize it may not be a common problem
>>> on any currently popular platform, but don't you agree it is in
>>> principle unsafe to write to the ds_link field of dma descriptors
>>> without a guarantee that those writes will be performed in the
>>> intended order?
>> Haven't had time to review this in detail yet. I'll take another look at
>> it later...
> 
> Had a chance to look at it?  I've been carrying this in my
> tree and it hasn't caused any obvious problems, for what that's
> worth...
Not sure if the patch helps with anything, but I think it can go in...

- Felix
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