From mboxrd@z Thu Jan  1 00:00:00 1970
From: axboe@kernel.dk (Jens Axboe)
Date: Tue, 31 Mar 2015 10:40:12 -0600
Subject: [PATCH v2 1/1] nvme: Fix PRP list calculation for non-4k system
 page size
In-Reply-To: <alpine.LNX.2.00.1503261618220.32385@localhost.lm.intel.com>
References: <201503242226.t2OMQpWq011660@d03av02.boulder.ibm.com>
 <alpine.LNX.2.00.1503242233530.32385@localhost.lm.intel.com>
 <55142ED7.8040809@linux.vnet.ibm.com>
 <alpine.LNX.2.00.1503261618220.32385@localhost.lm.intel.com>
Message-ID: <551ACDEC.5040303@kernel.dk>

On 03/26/2015 10:19 AM, Keith Busch wrote:
> On Thu, 26 Mar 2015, Brian King wrote:
>> From: Murali Iyer <mniyer at us.ibm.com>
>>
>> PRP list calculation is supposed to be based on device's page size.
>> Systems with page size larger than device's page size cause corruption
>> to the name space as well as system memory with out this fix.
>> Systems like x86 might not experience this issue because it uses
>> PAGE_SIZE of 4K where as powerpc uses PAGE_SIZE of 64k while NVMe
>> device's
>> page size varies depending upon the vendor.
>
> Thanks!
>
> Acked-by: Keith Busch <keith.busch at intel.com>

Added for 4.1.

-- 
Jens Axboe