orangefs_bufmap_copy_from_iovec(): fix EFAULT handling

short copy here should mean instant EFAULT, not "move to the
next page and hope it fails there, this time with nothing
copied"

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

1 files changed, 1 insertions, 3 deletions

diff --git a/fs/orangefs/orangefs-bufmap.c b/fs/orangefs/orangefs-bufmap.c
index 6333cbbdfef7..83b506020718 100644
--- a/fs/orangefs/orangefs-bufmap.c
+++ b/fs/orangefs/orangefs-bufmap.c
@@ -521,13 +521,11 @@ int orangefs_bufmap_copy_from_iovec(struct iov_iter *iter,
                 size_t n = size;
                 if (n > PAGE_SIZE)
                         n = PAGE_SIZE;
-                n = copy_page_from_iter(page, 0, n, iter);
-                if (!n)
+                if (copy_page_from_iter(page, 0, n, iter) != n)
                         return -EFAULT;
                 size -= n;
         }
         return 0;
-
 }
 
 /*