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Date: Thu, 13 Dec 2018 08:27:18 -0800
From: Matthew Wilcox <willy@infradead.org>
To: Goldwyn Rodrigues <rgoldwyn@suse.de>
Cc: linux-fsdevel@vger.kernel.org, linux-aio@kvack.org,
        avi@scylladb.com
Subject: Re: [PATCH] fs: Return EOPNOTSUPP if block layer does not support
 REQ_NOWAIT
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On Thu, Dec 13, 2018 at 05:53:06AM -0600, Goldwyn Rodrigues wrote:
> For AIO+DIO with RWF_NOWAIT, if the block layer does not support REQ_NOWAIT,
> it returns EIO. Return EOPNOTSUPP to represent the correct error code.

Why is EOPNOTSUPP the "correct" error code?  That's a networking error,
not a block layer error.