From: Mauricio Faria de Oliveira <mauricfo@linux.vnet.ibm.com>
To: James Smart <james.smart@broadcom.com>,
linux-scsi@vger.kernel.org,
"Martin K. Petersen" <martin.petersen@oracle.com>
Subject: Re: [PATCH v2 10/11] lpfc: Add missing memory barrier
Date: Fri, 3 Mar 2017 22:46:13 -0300 [thread overview]
Message-ID: <119bfea5-e903-ed2d-0a5d-a461a82dcf0e@linux.vnet.ibm.com> (raw)
In-Reply-To: <58586832.woeJM8e1raA2NxNi%james.smart@broadcom.com>
On 12/19/2016 09:07 PM, James Smart wrote:
> On loosely ordered memory systems (PPC for example), the WQE elements
> were being updated in memory, but not necessarily flushed before the
> separate doorbell was written to hw which would cause hw to dma the
> WQE element. Thus, the hardware occasionally received partially
> updated WQE data.
>
> Add the memory barrier after updating the WQE memory.
Reviewed-by: Mauricio Faria de Oliveira <mauricfo@linux.vnet.ibm.com>
Martin, may you please flag this patch for stable?
Thank you,
--
Mauricio Faria de Oliveira
IBM Linux Technology Center
prev parent reply other threads:[~2017-03-04 1:46 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-19 23:07 [PATCH v2 10/11] lpfc: Add missing memory barrier James Smart
2016-12-20 13:47 ` Hannes Reinecke
2017-03-04 1:46 ` Mauricio Faria de Oliveira [this message]
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