fuse: ->direct_IO() doesn't need generic_write_checks()

already done by caller.  We used to call __fuse_direct_write(), which
called generic_write_checks(); now the former got expanded, bringing
the latter to the surface.  It used to be called all along and calling
it from there had been wrong all along...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 4c04a81..8c15d0a 100644 (file)
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -2806,8 +2806,8 @@ fuse_direct_IO(struct kiocb *iocb, struct iov_iter *iter, loff_t offset)
        if (async_dio && iov_iter_rw(iter) != WRITE && offset + count > i_size) {
                if (offset >= i_size)
                        return 0;
-               count = min_t(loff_t, count, fuse_round_up(i_size - offset));
-               iov_iter_truncate(iter, count);
+               iov_iter_truncate(iter, fuse_round_up(i_size - offset));
+               count = iov_iter_count(iter);
        }
 
        io = kmalloc(sizeof(struct fuse_io_priv), GFP_KERNEL);
@@ -2841,12 +2841,7 @@ fuse_direct_IO(struct kiocb *iocb, struct iov_iter *iter, loff_t offset)
                io->done = &wait;
 
        if (iov_iter_rw(iter) == WRITE) {
-               ret = generic_write_checks(file, &pos, &count);
-               if (!ret) {
-                       iov_iter_truncate(iter, count);
-                       ret = fuse_direct_io(io, iter, &pos, FUSE_DIO_WRITE);
-               }
-
+               ret = fuse_direct_io(io, iter, &pos, FUSE_DIO_WRITE);
                fuse_invalidate_attr(inode);
        } else {
                ret = __fuse_direct_read(io, iter, &pos);