Factor outstanding I/O error handling

Cleanup: setting an outstanding error on a mapping was open coded too many
times.  Factor it out in mapping_set_error().

Signed-off-by: Guillaume Chazarain <guichaz@yahoo.fr>
Cc: Steven Whitehouse <swhiteho@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/gfs2/glops.c b/fs/gfs2/glops.c
index 39c8ae2..7b82657 100644
--- a/fs/gfs2/glops.c
+++ b/fs/gfs2/glops.c
@@ -163,10 +163,7 @@
 		if (ip) {
 			struct address_space *mapping = ip->i_inode.i_mapping;
 			int error = filemap_fdatawait(mapping);
-			if (error == -ENOSPC)
-				set_bit(AS_ENOSPC, &mapping->flags);
-			else if (error)
-				set_bit(AS_EIO, &mapping->flags);
+			mapping_set_error(mapping, error);
 		}
 		clear_bit(GLF_DIRTY, &gl->gl_flags);
 		gfs2_ail_empty_gl(gl);