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Date:   Thu, 26 Mar 2020 07:52:53 -0700
From:   Christoph Hellwig <hch@infradead.org>
To:     Andrzej Pietrasiewicz <andrzej.p@collabora.com>
Cc:     linux-block@vger.kernel.org, Jens Axboe <axboe@kernel.dk>,
        kernel@collabora.com, Evan Green <evgreen@chromium.org>
Subject: Re: [PATCH RESEND 1/2] loop: Report EOPNOTSUPP properly
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References: <20200317151111.25749-2-andrzej.p@collabora.com>
 <20200317165106.29282-1-andrzej.p@collabora.com>
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On Tue, Mar 17, 2020 at 05:51:06PM +0100, Andrzej Pietrasiewicz wrote:
> From: Evan Green <evgreen@chromium.org>
> 
> Properly plumb out EOPNOTSUPP from loop driver operations, which may
> get returned when for instance a discard operation is attempted but not
> supported by the underlying block device. Before this change, everything
> was reported in the log as an I/O error, which is scary and not
> helpful in debugging.

This really should be using errno_to_blk_status.