From mboxrd@z Thu Jan  1 00:00:00 1970
From: Mike Snitzer <snitzer@redhat.com>
Subject: Re: dm: check error instead of r in clone_endio
Date: Wed, 17 Dec 2014 12:34:43 -0500
Message-ID: <20141217173443.GC27737@redhat.com>
References: <54912490.8030808@huawei.com>
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To: alex chen <alex.chen@huawei.com>
Cc: device-mapper development <dm-devel@redhat.com>, Joseph Qi <joseph.qi@huawei.com>
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On Wed, Dec 17 2014 at  1:37am -0500,
alex chen <alex.chen@huawei.com> wrote:

> In the clone_endio, when target_type is linear and WRITE SAME bio
> fails, r will be always be initialized 0 because of null end_io, and
> in this case WRITE SAME will not be disabled.
> So we should check error instead of r.
> 
> Signed-off-by: Alex Chen <alex.chen@huawei.com>

I've fixed it a bit differently (clone_endio now matches dm_done) and
have staged it for 3.19, see:
https://git.kernel.org/cgit/linux/kernel/git/device-mapper/linux-dm.git/commit/?h=for-next&id=5164bece1673cdf04782f8ed3fba70743700f5da

Thanks.