Commit b089cfd9 authored Aug 14, 2018 by Jens Axboe

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 <stefan@agner.ch>
Fixes: 721c7fc7 ("block: fail op_is_write() requests to read-only partitions")
Signed-off-by: Jens Axboe <axboe@kernel.dk>

parent eb2b3d03

block/blk-core.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -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