[PATCH 3/5] i915 compat ioctl(): just use drm_ioctl_kernel()

[Al Viro]

From: Al Viro <v...@zeniv.linux.org.uk>

compat_alloc_user_space() is a bad kludge; the sooner it goes, the
better...

Signed-off-by: Al Viro <v...@zeniv.linux.org.uk>
---
 drivers/gpu/drm/i915/i915_ioc32.c | 14 +++++---------
 1 file changed, 5 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_ioc32.c 
b/drivers/gpu/drm/i915/i915_ioc32.c
index 8e45ca3d2ede..55b97c3a3dde 100644
--- a/drivers/gpu/drm/i915/i915_ioc32.c
+++ b/drivers/gpu/drm/i915/i915_ioc32.c
@@ -47,20 +47,16 @@ static int compat_i915_getparam(struct file *file, unsigned 
int cmd,
                                unsigned long arg)
 {
        struct drm_i915_getparam32 req32;
-       drm_i915_getparam_t __user *request;
+       struct drm_i915_getparam req;
 
        if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
                return -EFAULT;
 
-       request = compat_alloc_user_space(sizeof(*request));
-       if (!access_ok(request, sizeof(*request)) ||
-           __put_user(req32.param, &request->param) ||
-           __put_user((void __user *)(unsigned long)req32.value,
-                      &request->value))
-               return -EFAULT;
+       req.param = req32.param;
+       req.value = compat_ptr(req32.value);
 
-       return drm_ioctl(file, DRM_IOCTL_I915_GETPARAM,
-                        (unsigned long)request);
+       return drm_ioctl_kernel(file, i915_getparam_ioctl, &req,
+                               DRM_RENDER_ALLOW);
 }
 
 static drm_ioctl_compat_t *i915_compat_ioctls[] = {
-- 
2.11.0