From ca8ab593d7cbede7973fd4cbaa7f1918919c8a9e Mon Sep 17 00:00:00 2001 From: Viresh Kumar Date: Mon, 16 Oct 2023 12:41:25 +0530 Subject: [PATCH] xen: irqfd: Use _IOW instead of the internal _IOC() macro [ 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 Closes: https://lore.kernel.org/all/268a2031-63b8-4c7d-b1e5-8ab83ca80b4a@app.fastmail.com/ Signed-off-by: Viresh Kumar Reviewed-by: Juergen Gross Link: https://lore.kernel.org/r/599ca6f1b9dd2f0e6247ea37bee3ea6827404b6d.1697439990.git.viresh.kumar@linaro.org Signed-off-by: Juergen Gross Signed-off-by: Sasha Levin --- include/uapi/xen/privcmd.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/uapi/xen/privcmd.h b/include/uapi/xen/privcmd.h index b143faf..e145bca 100644 --- 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 \ - _IOC(_IOC_NONE, 'P', 8, sizeof(struct privcmd_irqfd)) + _IOW('P', 8, struct privcmd_irqfd) #endif /* __LINUX_PUBLIC_PRIVCMD_H__ */ -- 2.7.4