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erofs: fix ztailpacking for subpage compressed blocks

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[ Upstream commit e5aba911dee5e20fa82efbe13e0af8f38ea459e7 ]

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

Acked-by: Chao Yu <chao@kernel.org>
Reviewed-by: Yue Hu <huyue2@coolpad.com>
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Link: https://lore.kernel.org/r/20231214161337.753049-1-hsiangkao@linux.alibaba.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Gao Xiang 2023-12-15 00:13:37 +08:00 committed by Greg Kroah-Hartman
parent 6c7bdb97d4
commit e0e78522b4
1 changed files with 1 additions and 1 deletions
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2
fs/erofs/zdata.c
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@ -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 */