Re: [PATCH] fs: Return EOPNOTSUPP if block layer does not support REQ_NOWAIT

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To: Goldwyn Rodrigues <rgoldwyn@xxxxxxx>
Subject: Re: [PATCH] fs: Return EOPNOTSUPP if block layer does not support REQ_NOWAIT
From: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Date: Thu, 13 Dec 2018 08:27:18 -0800
Cc: linux-fsdevel@xxxxxxxxxxxxxxx, linux-aio@xxxxxxxxx, avi@xxxxxxxxxxxx
In-reply-to: <20181213115306.fm2mjc3qszjiwkgf@merlin>
User-agent: Mutt/1.9.2 (2017-12-15)

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.

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  - From: Goldwyn Rodrigues

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