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xen: irqfd: Use _IOW instead of the internal _IOC() macro
[ Upstream commit767e33ca47
] _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:f8941e6c4c
("xen: privcmd: Add support for irqfd") Reported-by: Arnd Bergmann <arnd@kernel.org> Closes: https://lore.kernel.org/all/268a2031-63b8-4c7d-b1e5-8ab83ca80b4a@app.fastmail.com/ Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Reviewed-by: Juergen Gross <jgross@suse.com> Link: https://lore.kernel.org/r/599ca6f1b9dd2f0e6247ea37bee3ea6827404b6d.1697439990.git.viresh.kumar@linaro.org Signed-off-by: Juergen Gross <jgross@suse.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -138,6 +138,6 @@ struct privcmd_irqfd {
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#define IOCTL_PRIVCMD_MMAP_RESOURCE \
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_IOC(_IOC_NONE, 'P', 7, sizeof(struct privcmd_mmap_resource))
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#define IOCTL_PRIVCMD_IRQFD \
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_IOC(_IOC_NONE, 'P', 8, sizeof(struct privcmd_irqfd))
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_IOW('P', 8, struct privcmd_irqfd)
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#endif /* __LINUX_PUBLIC_PRIVCMD_H__ */
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