linux-kernel - Re: [PATCH] mtip32xx: mtip_async

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Message-ID: <53221CF5.2080000@kernel.dk>
Date:	Thu, 13 Mar 2014 15:02:45 -0600
From:	Jens Axboe <axboe@...nel.dk>
To:	Sam Bradshaw <sbradshaw@...ron.com>
CC:	linux-kernel@...r.kernel.org,
	Felipe Franciosi <felipe@...adoxo.org>,
	david.vrabel@...rix.com,
	"Asai Thambi Samymuthu Pattrayasamy (asamymuthupa)" 
	<asamymuthupa@...ron.com>
Subject: Re: [PATCH] mtip32xx: mtip_async_complete() bug fixes

On 03/13/2014 03:09 PM, Sam Bradshaw wrote:
> This patch fixes 2 issues in the fast completion path:
> 1) Possible double completions / double dma_unmap_sg() calls due to lack
> of atomicity in the check and subsequent dereference of the upper layer
> callback function.  Fixed with cmpxchg before unmap and callback.
> 2) Regression in unaligned IO constraining workaround for p420m devices.
>   Fixed by checking if IO is unaligned and using proper semaphore if so.

Sam, what is this patch against? It doesn't apply to -rc6 and it doesn't 
apply to for-3.15/drivers (the latter would be preferred/required). It 
also seems to have line break issues.

-- 
Jens Axboe

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