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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>
This commit is contained in:
Zhang Yi 2022-09-01 21:34:56 +08:00 committed by Andrew Morton
parent 86a020cc72
commit 0ed4806188
1 changed files with 1 additions and 1 deletions
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2
fs/isofs/compress.c
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@ -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;