linux-kernel - Re: [PATCH 3/3] mpt3sas, mpt2sas: fix scsi_add_host error handling problems in _scsih

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Message-ID: <20140718094649.GC2121@lst.de>
Date:	Fri, 18 Jul 2014 11:46:49 +0200
From:	Christoph Hellwig <hch@....de>
To:	Robert Elliott <elliott@...com>
Cc:	axboe@...nel.dk, abhijit.mahajan@...gotech.com, kmo@...arainc.com,
	nagalakshmi.nandigama@...gotech.com, asamymuthupa@...ron.com,
	snitzer@...hat.com, JBottomley@...allels.com,
	relliott@...rdog.cce.hp.com, sreekanth.reddy@...gotech.com,
	praveen.krishnamoorthy@...gotech.com, agordeev@...hat.com,
	scameron@...rdog.cce.hp.com, tom.leiming@...il.com,
	sbradshaw@...ron.com, hch@....de, m@...rling.me,
	linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org
Subject: Re: [PATCH 3/3] mpt3sas, mpt2sas: fix scsi_add_host error handling
	problems in _scsih_probe

On Thu, Jul 17, 2014 at 02:39:30PM -0500, Robert Elliott wrote:
> In _scsih_probe, propagate the return value from scsi_add_host.
> In mpt3sas, avoid calling list_del twice if that returns an
> error, which causes list_del corruption warnings if an error
> is returned.
> 
> Tested with blk-mq and scsi-mq patches to properly cleanup
> from and propagate blk_mq_init_rq_map errors.
> 
> Signed-off-by: Robert Elliott <elliott@...com>

Looks good.  It would be even better if we'd have proper error values
returned from mpt2/3sas_base_attach as well.

Reviewed-by: Christoph Hellwig <hch@....de>
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