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-rw-r--r--fs/btrfs/inode.c14
1 files changed, 11 insertions, 3 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index b12850b31cb3..1f58debb9a04 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -4863,9 +4863,6 @@ again:
ret = -ENOMEM;
goto out;
}
- ret = set_page_extent_mapped(page);
- if (ret < 0)
- goto out_unlock;
if (!PageUptodate(page)) {
ret = btrfs_read_folio(NULL, page_folio(page));
@@ -4880,6 +4877,17 @@ again:
goto out_unlock;
}
}
+
+ /*
+ * We unlock the page after the io is completed and then re-lock it
+ * above. release_folio() could have come in between that and cleared
+ * PagePrivate(), but left the page in the mapping. Set the page mapped
+ * here to make sure it's properly set for the subpage stuff.
+ */
+ ret = set_page_extent_mapped(page);
+ if (ret < 0)
+ goto out_unlock;
+
wait_on_page_writeback(page);
lock_extent(io_tree, block_start, block_end, &cached_state);