usbdevfs: get rid of field-by-field copyin
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index cfc3cff..b2316c0 100644
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -1966,27 +1966,21 @@ static int proc_disconnectsignal_compat(struct usb_dev_state *ps, void __user *a
static int get_urb32(struct usbdevfs_urb *kurb,
struct usbdevfs_urb32 __user *uurb)
{
- __u32 uptr;
- if (!access_ok(VERIFY_READ, uurb, sizeof(*uurb)) ||
- __get_user(kurb->type, &uurb->type) ||
- __get_user(kurb->endpoint, &uurb->endpoint) ||
- __get_user(kurb->status, &uurb->status) ||
- __get_user(kurb->flags, &uurb->flags) ||
- __get_user(kurb->buffer_length, &uurb->buffer_length) ||
- __get_user(kurb->actual_length, &uurb->actual_length) ||
- __get_user(kurb->start_frame, &uurb->start_frame) ||
- __get_user(kurb->number_of_packets, &uurb->number_of_packets) ||
- __get_user(kurb->error_count, &uurb->error_count) ||
- __get_user(kurb->signr, &uurb->signr))
+ struct usbdevfs_urb32 urb32;
+ if (copy_from_user(&urb32, uurb, sizeof(*uurb)))
return -EFAULT;
-
- if (__get_user(uptr, &uurb->buffer))
- return -EFAULT;
- kurb->buffer = compat_ptr(uptr);
- if (__get_user(uptr, &uurb->usercontext))
- return -EFAULT;
- kurb->usercontext = compat_ptr(uptr);
-
+ kurb->type = urb32.type;
+ kurb->endpoint = urb32.endpoint;
+ kurb->status = urb32.status;
+ kurb->flags = urb32.flags;
+ kurb->buffer = compat_ptr(urb32.buffer);
+ kurb->buffer_length = urb32.buffer_length;
+ kurb->actual_length = urb32.actual_length;
+ kurb->start_frame = urb32.start_frame;
+ kurb->number_of_packets = urb32.number_of_packets;
+ kurb->error_count = urb32.error_count;
+ kurb->signr = urb32.signr;
+ kurb->usercontext = compat_ptr(urb32.usercontext);
return 0;
}
@@ -2198,18 +2192,14 @@ static int proc_ioctl_default(struct usb_dev_state *ps, void __user *arg)
#ifdef CONFIG_COMPAT
static int proc_ioctl_compat(struct usb_dev_state *ps, compat_uptr_t arg)
{
- struct usbdevfs_ioctl32 __user *uioc;
+ struct usbdevfs_ioctl32 ioc32;
struct usbdevfs_ioctl ctrl;
- u32 udata;
- uioc = compat_ptr((long)arg);
- if (!access_ok(VERIFY_READ, uioc, sizeof(*uioc)) ||
- __get_user(ctrl.ifno, &uioc->ifno) ||
- __get_user(ctrl.ioctl_code, &uioc->ioctl_code) ||
- __get_user(udata, &uioc->data))
+ if (copy_from_user(&ioc32, compat_ptr(arg), sizeof(ioc32)))
return -EFAULT;
- ctrl.data = compat_ptr(udata);
-
+ ctrl.ifno = ioc32.ifno;
+ ctrl.ioctl_code = ioc32.ioctl_code;
+ ctrl.data = compat_ptr(ioc32.data);
return proc_ioctl(ps, &ctrl);
}
#endif