linux-kernel - Re: [PATCH] nvmet: fix nvmet_execute_write

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Date:   Mon, 2 Apr 2018 08:21:42 -0600
From:   Keith Busch <keith.busch@...el.com>
To:     Rodrigo Rosatti Galvao <rosattig@...ux.vnet.ibm.com>
Cc:     chaitany kulkarni <ckulkarnilinux@...il.com>,
        Sagi Grimberg <sagi@...mberg.me>, linux-kernel@...r.kernel.org,
        linux-nvme@...ts.infradead.org, hch@....de,
        Chaitanya Kulkarni <chaitanya.kulkarni@....com>
Subject: Re: [PATCH] nvmet: fix nvmet_execute_write_zeroes function

On Mon, Apr 02, 2018 at 10:47:10AM -0300, Rodrigo Rosatti Galvao wrote:
> One thing that I just forgot to explain previously, but I think its
> relevant:
> 
> 1. The command is failing with 4k logical block size, but works with 512B
> 
> 2. With the patch, the command is working for both 512B and 4K.

While you're not getting errors with your patch, you're not zeroing out
the requested blocks, so that's a data corruption.

The issue is the +1 is in the wrong place. It needs to be added to the
native format prior to converting it to a 512b sector count. Do you want
to resend with that change?