From mboxrd@z Thu Jan  1 00:00:00 1970
From: Uma Krishnan <ukrishn@linux.vnet.ibm.com>
Subject: Re: [PATCH 4/6] cxlflash: Improve EEH recovery time
Date: Fri, 9 Sep 2016 17:14:09 -0500
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To: linux-scsi@vger.kernel.org, James Bottomley <jejb@linux.vnet.ibm.com>, "Martin K. Petersen" <martin.petersen@oracle.com>, "Matthew R. Ochs" <mrochs@linux.vnet.ibm.com>, "Manoj N. Kumar" <manoj@linux.vnet.ibm.com>
Cc: Brian King <brking@linux.vnet.ibm.com>, linuxppc-dev@lists.ozlabs.org, Ian Munsie <imunsie@au1.ibm.com>, Andrew Donnellan <andrew.donnellan@au1.ibm.com>, Frederic Barrat <fbarrat@linux.vnet.ibm.com>, Christophe Lombard <clombard@linux.vnet.ibm.com>

On 9/2/2016 3:40 PM, Uma Krishnan wrote:
> From: "Matthew R. Ochs" <mrochs@linux.vnet.ibm.com>
>
> When an EEH occurs during device initialization, the port timeout
> logic can cause excessive delays as MMIO reads will fail. Depending
> on where they are experienced, these delays can lead to a prolonged
> reset, causing an unnecessary triggering of other timeout logic in
> the SCSI stack or user applications.
>
> To expedite recovery, the port timeout logic is updated to decay the
> timeout at a much faster rate when in the presence of a likely EEH
> frozen event.
>
> Signed-off-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>

Acked-by: Uma Krishnan <ukrishn@linux.vnet.ibm.com>