isofs: replace ll_rw_block()

ll_rw_block() is not safe for the sync read path because it cannot
guarantee that submitting read IO if the buffer has been locked. We
could get false positive EIO return from zisofs_uncompress_block() if
he buffer has been locked by others. So stop using ll_rw_block(),
switch to sync helper instead.

Link: https://lkml.kernel.org/r/20220901133505.2510834-6-yi.zhang@huawei.com
Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/fs/isofs/compress.c b/fs/isofs/compress.c
index b466172..59b03d7 100644 (file)
--- a/fs/isofs/compress.c
+++ b/fs/isofs/compress.c
@@ -82,7 +82,7 @@ static loff_t zisofs_uncompress_block(struct inode *inode, loff_t block_start,
                return 0;
        }
        haveblocks = isofs_get_blocks(inode, blocknum, bhs, needblocks);
-       ll_rw_block(REQ_OP_READ, haveblocks, bhs);
+       bh_read_batch(haveblocks, bhs);
 
        curbh = 0;
        curpage = 0;