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block: add cmd_flags to print_req_error 

I ran into a bug where after hibernation due to incompatible
backends, the block driver returned BLK_STS_NOTSUPP, with the
current message it's hard to find out what the command flags
were. Adding req->cmd_flags help make the problem easier to
diagnose.

Reviewed-by: Eduardo Valentin <eduval@amazon.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Balbir Singh <sblbir@amzn.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Balbir Singh 2018-10-30 02:40:15 +00:00 committed by Jens Axboe
parent 5d2ee7122c
commit 2149da0748
1 changed files with 5 additions and 4 deletions
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9
block/blk-core.c
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@ -173,10 +173,11 @@ static void print_req_error(struct request *req, blk_status_t status)
if (WARN_ON_ONCE(idx >= ARRAY_SIZE(blk_errors)))
return;
printk_ratelimited(KERN_ERR "%s: %s error, dev %s, sector %llu\n",
__func__, blk_errors[idx].name, req->rq_disk ?
req->rq_disk->disk_name : "?",
(unsigned long long)blk_rq_pos(req));
printk_ratelimited(KERN_ERR "%s: %s error, dev %s, sector %llu flags %x\n",
__func__, blk_errors[idx].name,
req->rq_disk ? req->rq_disk->disk_name : "?",
(unsigned long long)blk_rq_pos(req),
req->cmd_flags);
}
static void req_bio_endio(struct request *rq, struct bio *bio,