vmsplice_to_user(): switch to import_iovec()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/splice.c b/fs/splice.c
index 4bbfa95..41cbb16 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -1533,34 +1533,29 @@
struct iovec iovstack[UIO_FASTIOV];
struct iovec *iov = iovstack;
struct iov_iter iter;
- ssize_t count;
pipe = get_pipe_info(file);
if (!pipe)
return -EBADF;
- ret = rw_copy_check_uvector(READ, uiov, nr_segs,
- ARRAY_SIZE(iovstack), iovstack, &iov);
- if (ret <= 0)
- goto out;
+ ret = import_iovec(READ, uiov, nr_segs,
+ ARRAY_SIZE(iovstack), &iov, &iter);
+ if (ret < 0)
+ return ret;
- count = ret;
- iov_iter_init(&iter, READ, iov, nr_segs, count);
-
+ sd.total_len = iov_iter_count(&iter);
sd.len = 0;
- sd.total_len = count;
sd.flags = flags;
sd.u.data = &iter;
sd.pos = 0;
- pipe_lock(pipe);
- ret = __splice_from_pipe(pipe, &sd, pipe_to_user);
- pipe_unlock(pipe);
+ if (sd.total_len) {
+ pipe_lock(pipe);
+ ret = __splice_from_pipe(pipe, &sd, pipe_to_user);
+ pipe_unlock(pipe);
+ }
-out:
- if (iov != iovstack)
- kfree(iov);
-
+ kfree(iov);
return ret;
}