linux-kernel - Re: [PATCH] scsi: mpt3sas: fix hang on ata passthru commands

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Message-ID: <yq14m0ylnx1.fsf@oracle.com>
Date:   Mon, 16 Jan 2017 16:01:30 -0500
From:   "Martin K. Petersen" <martin.petersen@...cle.com>
To:     James Bottomley <James.Bottomley@...senPartnership.com>
Cc:     "Martin K. Petersen" <martin.petersen@...cle.com>,
        David Miller <davem@...emloft.net>,
        Bart Van Assche <Bart.VanAssche@...disk.com>,
        Christoph Hellwig <hch@...radead.org>, jbaron@...mai.com,
        "linux-kernel\@vger.kernel.org" <linux-kernel@...r.kernel.org>,
        sagi@...mberg.me, Sathya Prakash <sathya.prakash@...adcom.com>,
        Suganath Prabu Subramani 
        <suganath-prabu.subramani@...adcom.com>,
        Hannes Reinecke <hare@...e.de>,
        "linux-scsi\@vger.kernel.org" <linux-scsi@...r.kernel.org>,
        Christoph Hellwig <hch@....de>,
        Chaitra Basappa <chaitra.basappa@...adcom.com>,
        dledford@...hat.com,
        Sreekanth Reddy <sreekanth.reddy@...adcom.com>,
        Ingo Molnar <mingo@...nel.org>
Subject: Re: [PATCH] scsi: mpt3sas: fix hang on ata passthru commands

>>>>> "James" == James Bottomley <James.Bottomley@...senPartnership.com> writes:

James> Subject: [PATCH] scsi: mpt3sas: fix hang on ata passthrough
James> commands

James> mpt3sas has a firmware failure where it can only handle one pass
James> through ATA command at a time.  If another comes in, contrary to
James> the SAT standard, it will hang until the first one completes
James> (causing long commands like secure erase to timeout).  The
James> original fix was to block the device when an ATA command came in,
James> but this caused a regression with

Broadcom folks: Please test and ack as soon as possible so we can get
this fix queued up.

Ingo: Since you appear to have hardware, it would be great if you could
test James' v3 (https://patchwork.kernel.org/patch/9519383/). Sorry for
the inconvenience.

-- 
Martin K. Petersen	Oracle Linux Engineering