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Re: [PATCH V4 2/4] xen: irqfd: Use _IOW instead of the internal _IOC() macro
- To: Viresh Kumar <viresh.kumar@xxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>
- From: Juergen Gross <jgross@xxxxxxxx>
- Date: Mon, 16 Oct 2023 09:14:46 +0200
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- Cc: Vincent Guittot <vincent.guittot@xxxxxxxxxx>, Alex Bennée <alex.bennee@xxxxxxxxxx>, stratos-dev@xxxxxxxxxxxxxxxxxxx, Erik Schilling <erik.schilling@xxxxxxxxxx>, Manos Pitsidianakis <manos.pitsidianakis@xxxxxxxxxx>, Mathieu Poirier <mathieu.poirier@xxxxxxxxxx>, Arnd Bergmann <arnd@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx
- Delivery-date: Mon, 16 Oct 2023 07:14:51 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 16.10.23 09:11, Viresh Kumar wrote:
_IOC() an internal helper that we should not use in driver code. In
particular, we got the data direction wrong here, which breaks a number
of tools, as having "_IOC_NONE" should never be paired with a nonzero
size.
Use _IOW() instead.
Fixes: f8941e6c4c71 ("xen: privcmd: Add support for irqfd")
Reported-by: Arnd Bergmann <arnd@xxxxxxxxxx>
Closes:
https://lore.kernel.org/all/268a2031-63b8-4c7d-b1e5-8ab83ca80b4a@xxxxxxxxxxxxxxxx/
Signed-off-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
Reviewed-by: Juergen Gross <jgross@xxxxxxxx>
Juergen
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