- orig_bufsz = cmdbuf->bufsz;
- if (orig_bufsz != 0) {
- kbuf = kmalloc(cmdbuf->bufsz, GFP_KERNEL);
- if (kbuf == NULL)
- return -ENOMEM;
- if (DRM_COPY_FROM_USER(kbuf, (void __user *)cmdbuf->buf,
- cmdbuf->bufsz)) {
- kfree(kbuf);
- return -EFAULT;
- }
- cmdbuf->buf = kbuf;
+ if (cmdbuf->bufsz != 0) {
+ int rv;
+ void __user *buffer = cmdbuf->buffer;
+ rv = drm_buffer_alloc(&cmdbuf->buffer, cmdbuf->bufsz);
+ if (rv)
+ return rv;
+ rv = drm_buffer_copy_from_user(cmdbuf->buffer, buffer,
+ cmdbuf->bufsz);
+ if (rv)
+ return rv;