blk-mq: return actual keyslot error in blk_insert_cloned_request()

To avoid hiding information, pass on the error code from
blk_crypto_rq_get_keyslot() instead of always using BLK_STS_IOERR.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20230315183907.53675-2-ebiggers@kernel.orgSigned-off-by: Jens Axboe <axboe@kernel.dk>

block/blk-mq.c

@@ -3049,8 +3049,9 @@ blk_status_t blk_insert_cloned_request(struct request *rq)
 	if (q->disk && should_fail_request(q->disk->part0, blk_rq_bytes(rq)))
 		return BLK_STS_IOERR;
 
-	if (blk_crypto_rq_get_keyslot(rq))
-		return BLK_STS_IOERR;
+	ret = blk_crypto_rq_get_keyslot(rq);
+	if (ret != BLK_STS_OK)
+		return ret;
 
 	blk_account_io_start(rq);