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xen: irqfd: Use _IOW instead of the internal _IOC() macro
author
Viresh Kumar
<viresh.kumar@linaro.org>
Mon, 16 Oct 2023 07:11:25 +0000
(12:41 +0530)
committer
Greg Kroah-Hartman
<gregkh@linuxfoundation.org>
Mon, 20 Nov 2023 10:59:12 +0000
(11:59 +0100)
[ Upstream commit
767e33ca47dd8ace7769e0b0c19d7b0c38b2f72d
]
_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@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>
include/uapi/xen/privcmd.h
patch
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diff --git
a/include/uapi/xen/privcmd.h
b/include/uapi/xen/privcmd.h
index
b143faf
..
e145bca
100644
(file)
--- a/
include/uapi/xen/privcmd.h
+++ b/
include/uapi/xen/privcmd.h
@@
-138,6
+138,6
@@
struct privcmd_irqfd {
#define IOCTL_PRIVCMD_MMAP_RESOURCE \
_IOC(_IOC_NONE, 'P', 7, sizeof(struct privcmd_mmap_resource))
#define IOCTL_PRIVCMD_IRQFD \
- _IO
C(_IOC_NONE, 'P', 8, sizeof(struct privcmd_irqfd)
)
+ _IO
W('P', 8, struct privcmd_irqfd
)
#endif /* __LINUX_PUBLIC_PRIVCMD_H__ */