4.19-stable review patch. If anyone has any objections, please let me know.
------------------
From: Gao Xiang <gaoxiang25@xxxxxxxxxx>
commit 0734ffbf574ee813b20899caef2fe0ed502bb783 upstream.
As described in Kconfig, the last compressed pack should be cached
for further reading for either `EROFS_FS_ZIP_CACHE_UNIPOLAR' or
`EROFS_FS_ZIP_CACHE_BIPOLAR' by design.
However, there is a bug in z_erofs_do_read_page, it will
switch `initial' to `false' at the very beginning before it decides
to cache the last compressed pack.
caching strategy should work properly after appling this patch.
Reviewed-by: Chao Yu <yuchao0@xxxxxxxxxx>
Signed-off-by: Gao Xiang <gaoxiang25@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/staging/erofs/unzip_vle.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/staging/erofs/unzip_vle.c
+++ b/drivers/staging/erofs/unzip_vle.c
@@ -624,7 +624,7 @@ repeat:
/* go ahead the next map_blocks */
debugln("%s: [out-of-range] pos %llu", __func__, offset + cur);
- if (!z_erofs_vle_work_iter_end(builder))
+ if (z_erofs_vle_work_iter_end(builder))
fe->initial = false;
map->m_la = offset + cur;
