Re: [PATCH net-next v3] checkpatch: warn about uses of ENOTSUPP

[David Miller <davem@davemloft.net>]

From: Jakub Kicinski <kuba@kernel.org>
Date: Mon, 11 May 2020 10:08:07 -0700

> ENOTSUPP often feels like the right error code to use, but it's
> in fact not a standard Unix error. E.g.:
> 
> $ python
>>>> import errno
>>>> errno.errorcode[errno.ENOTSUPP]
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> AttributeError: module 'errno' has no attribute 'ENOTSUPP'
> 
> There were numerous commits converting the uses back to EOPNOTSUPP
> but in some cases we are stuck with the high error code for backward
> compatibility reasons.
> 
> Let's try prevent more ENOTSUPPs from getting into the kernel.
> 
> Recent example:
> https://lore.kernel.org/netdev/20200510182252.GA411829@lunn.ch/
> 
> v3 (Joe):
>  - fix the "not file" condition.
> 
> v2 (Joe):
>  - add a link to recent discussion,
>  - don't match when scanning files, not patches to avoid sudden
>    influx of conversion patches.
> https://lore.kernel.org/netdev/20200511165319.2251678-1-kuba@kernel.org/
> 
> v1:
> https://lore.kernel.org/netdev/20200510185148.2230767-1-kuba@kernel.org/
> 
> Suggested-by: Andrew Lunn <andrew@lunn.ch>
> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
> Acked-by: Joe Perches <joe@perches.com>

Applied, thanks Jakub.