[PATCH v7 01/30] ntsync: Return the fd from NTSYNC_IOC_CREATE_SEM.
From: Elizabeth Figura <zfigura@codeweavers.com>
Date: 2024-12-13 19:35:43
Also in:
linux-doc, linux-kselftest, lkml
Subsystem:
char and misc drivers, ntsync synchronization primitive driver, the rest · Maintainers:
Arnd Bergmann, Greg Kroah-Hartman, Elizabeth Figura, Linus Torvalds
Simplify the user API a bit by returning the fd as return value from the ioctl instead of through the argument pointer. Signed-off-by: Elizabeth Figura <zfigura@codeweavers.com> --- drivers/misc/ntsync.c | 7 ++----- include/uapi/linux/ntsync.h | 3 +-- 2 files changed, 3 insertions(+), 7 deletions(-)
diff --git a/drivers/misc/ntsync.c b/drivers/misc/ntsync.c
index 4954553b7baa..2e7f698268c1 100644
--- a/drivers/misc/ntsync.c
+++ b/drivers/misc/ntsync.c@@ -165,7 +165,6 @@ static int ntsync_obj_get_fd(struct ntsync_obj *obj) static int ntsync_create_sem(struct ntsync_device *dev, void __user *argp) { - struct ntsync_sem_args __user *user_args = argp; struct ntsync_sem_args args; struct ntsync_obj *sem; int fd;
@@ -182,12 +181,10 @@ static int ntsync_create_sem(struct ntsync_device *dev, void __user *argp) sem->u.sem.count = args.count; sem->u.sem.max = args.max; fd = ntsync_obj_get_fd(sem); - if (fd < 0) { + if (fd < 0) kfree(sem); - return fd; - } - return put_user(fd, &user_args->sem); + return fd; } static int ntsync_char_open(struct inode *inode, struct file *file)
diff --git a/include/uapi/linux/ntsync.h b/include/uapi/linux/ntsync.h
index dcfa38fdc93c..27d8cb3dd5b7 100644
--- a/include/uapi/linux/ntsync.h
+++ b/include/uapi/linux/ntsync.h@@ -11,12 +11,11 @@ #include <linux/types.h> struct ntsync_sem_args { - __u32 sem; __u32 count; __u32 max; }; -#define NTSYNC_IOC_CREATE_SEM _IOWR('N', 0x80, struct ntsync_sem_args) +#define NTSYNC_IOC_CREATE_SEM _IOW ('N', 0x80, struct ntsync_sem_args) #define NTSYNC_IOC_SEM_POST _IOWR('N', 0x81, __u32)
--
2.45.2