From b8a6f89b6fd217ef6c85abdc31a26c2a5cf02f53 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sat, 29 Apr 2017 16:42:30 -0400
Subject: [PATCH] fix a braino in ITER_PIPE iov_iter_revert()

Fixes: 8a6f1091c320
Tested-by: Dave Jones <davej@codemonkey.org.uk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 lib/iov_iter.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/iov_iter.c b/lib/iov_iter.c
index 60abc44385b79..cc001a542cb55 100644
--- a/lib/iov_iter.c
+++ b/lib/iov_iter.c
@@ -798,7 +798,7 @@ void iov_iter_revert(struct iov_iter *i, size_t unroll)
 		while (1) {
 			size_t n = off - pipe->bufs[idx].offset;
 			if (unroll < n) {
-				off -= (n - unroll);
+				off -= unroll;
 				break;
 			}
 			unroll -= n;
-- 
2.39.5