From: Gao Xiang <[email protected]>

[ Upstream commit e5aba911dee5e20fa82efbe13e0af8f38ea459e7 ]

`pageofs_in` should be the compressed data offset of the page rather
than of the block.

Acked-by: Chao Yu <[email protected]>
Reviewed-by: Yue Hu <[email protected]>
Signed-off-by: Gao Xiang <[email protected]>
Link: 
https://lore.kernel.org/r/[email protected]
Signed-off-by: Sasha Levin <[email protected]>
---
 fs/erofs/zdata.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/erofs/zdata.c b/fs/erofs/zdata.c
index 1b91ac5be961..914897d9aeac 100644
--- a/fs/erofs/zdata.c
+++ b/fs/erofs/zdata.c
@@ -652,7 +652,6 @@ static int z_erofs_register_pcluster(struct 
z_erofs_decompress_frontend *fe)
 
        if (ztailpacking) {
                pcl->obj.index = 0;     /* which indicates ztailpacking */
-               pcl->pageofs_in = erofs_blkoff(map->m_pa);
                pcl->tailpacking_size = map->m_plen;
        } else {
                pcl->obj.index = map->m_pa >> PAGE_SHIFT;
@@ -852,6 +851,7 @@ static int z_erofs_do_read_page(struct 
z_erofs_decompress_frontend *fe,
                get_page(fe->map.buf.page);
                WRITE_ONCE(fe->pcl->compressed_bvecs[0].page,
                           fe->map.buf.page);
+               fe->pcl->pageofs_in = map->m_pa & ~PAGE_MASK;
                fe->mode = Z_EROFS_PCLUSTER_FOLLOWED_NOINPLACE;
        } else {
                /* bind cache first when cached decompression is preferred */
-- 
2.43.0

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