From b089cfd95d32638335c551651a8e00fd2c4edb0b Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Tue, 14 Aug 2018 10:52:40 -0600 Subject: [PATCH] block: don't warn for flush on read-only device Don't warn for a flush issued to a read-only device. It's not strictly a writable command, as it doesn't change any on-media data by itself. Reported-by: Stefan Agner Fixes: 721c7fc701c7 ("block: fail op_is_write() requests to read-only partitions") Signed-off-by: Jens Axboe --- block/blk-core.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/block/blk-core.c b/block/blk-core.c index 49af34bf2119..7aeef19704f2 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -2162,7 +2162,9 @@ static inline bool should_fail_request(struct hd_struct *part, static inline bool bio_check_ro(struct bio *bio, struct hd_struct *part) { - if (part->policy && op_is_write(bio_op(bio))) { + const int op = bio_op(bio); + + if (part->policy && (op_is_write(op) && !op_is_flush(op))) { char b[BDEVNAME_SIZE]; printk(KERN_ERR