Btrfs: Fix "no csum found for inode" issue.
A few codes were not properly updated for changes of extent map. This
may be the causes of "no csum found for inode" issue.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index fcae999..9262ab3 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -2417,12 +2417,13 @@
u64 end = start + PAGE_CACHE_SIZE - 1;
u64 orig_start = start;
int ret = 1;
-
if ((mask & __GFP_WAIT) &&
page->mapping->host->i_size > 16 * 1024 * 1024) {
+ u64 len;
while (start <= end) {
+ len = end - start + 1;
spin_lock(&map->lock);
- em = lookup_extent_mapping(map, start, end);
+ em = lookup_extent_mapping(map, start, len);
if (!em || IS_ERR(em)) {
spin_unlock(&map->lock);
break;