iov_iter_advance(): don't modify ->iov_offset for ITER_DISCARD

the field is not used for that flavour

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

diff --git a/lib/iov_iter.c b/lib/iov_iter.c
index bdcf1fb..e6c5834 100644 (file)
--- a/lib/iov_iter.c
+++ b/lib/iov_iter.c
@@ -172,8 +172,6 @@
                } else if (iov_iter_is_xarray(i)) {             \
                        struct bio_vec v;                       \
                        iterate_xarray(i, n, v, skip, (X))      \
-               } else if (iov_iter_is_discard(i)) {            \
-                       skip += n;                              \
                }                                               \
                i->count -= n;                                  \
                i->iov_offset = skip;                           \