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

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Message-ID: <yq1shohmpyh.fsf@oracle.com>
Date:   Tue, 17 Jan 2017 14:44:22 -0500
From:   "Martin K. Petersen" <martin.petersen@...cle.com>
To:     Christoph Hellwig <hch@....de>
Cc:     Sreekanth Reddy <sreekanth.reddy@...adcom.com>,
        James Bottomley <James.Bottomley@...senpartnership.com>,
        "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>,
        Chaitra Basappa <chaitra.basappa@...adcom.com>,
        dledford@...hat.com, Ingo Molnar <mingo@...nel.org>
Subject: Re: [PATCH] scsi: mpt3sas: fix hang on ata passthru commands

>>>>> "Christoph" == Christoph Hellwig <hch@....de> writes:

Christoph> On Tue, Jan 17, 2017 at 07:43:51PM +0530, Sreekanth Reddy wrote:
>> [Sreekanth] Just for readability purpose, can use use "if
>> (test_bit(0, &sas_device_priv_data->ata_command_pending)" instead of
>> "if (sas_device_priv_data->ata_command_pending)".  Since while
>> setting & clearing the bit we are using atomic bit operations. I
>> don't see any issue functionality wise.

Christoph> I agree.  Also while we're into nitpicking - it would be good
Christoph> to give bit 0 of the bitmap a name instead of hardcoding the
Christoph> 0.

I tweaked the test case. We can name the bit later if more flags are
needed (and in that case the ata_command_pending would need to get
renamed too).

In any case. This issue has taken waaay too long to get resolved so the
patch is now queued up in 4.10/scsi-fixes.

Thanks everyone!

-- 
Martin K. Petersen	Oracle Linux Engineering