Commit 55ef6899 authored by Yan, Zheng's avatar Yan, Zheng Committed by Chris Mason
Browse files

Btrfs: Fix btrfs_drop_extent_cache for skip pinned case 



The check for skip pinned case is wrong, it may breaks the
while loop too soon.

Signed-off-by: default avatarYan Zheng <zheng.yan@oracle.com>
Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
parent 24bbcf04

fs/btrfs/file.c

+3 −7
Original line number Diff line number Diff line
@@ -179,18 +179,14 @@ int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end, 
		}

		flags = em->flags;

		if (skip_pinned && test_bit(EXTENT_FLAG_PINNED, &em->flags)) {

			if (em->start <= start &&

			    (!testend || em->start + em->len >= start + len)) {

			if (testend && em->start + em->len >= start + len) {

				free_extent_map(em);

				write_unlock(&em_tree->lock);

				break;

			}

			if (start < em->start) {

				len = em->start - start;

			} else {

				len = start + len - (em->start + em->len);

			start = em->start + em->len;

			}

			if (testend)

				len = start + len - (em->start + em->len);

			free_extent_map(em);

			write_unlock(&em_tree->lock);

			continue;