Commit feffa5cc authored by Jens Axboe's avatar Jens Axboe
Browse files

nbd: fix setting of 'error' in NBD_DO_IT ioctl 



Multiple paths don't set it properly, ensure that we do.

Fixes: 9561a7ad ("nbd: add multi-connection support")
Signed-off-by: default avatarJens Axboe <axboe@fb.com>
parent 63db89ea

drivers/block/nbd.c

+5 −2
Original line number Diff line number Diff line
@@ -745,7 +745,7 @@ static int __nbd_ioctl(struct block_device *bdev, struct nbd_device *nbd, 
	case NBD_DO_IT: {

		struct recv_thread_args *args;

		int num_connections = nbd->num_connections;

		int error, i;

		int error = 0, i;



		if (nbd->task_recv)

			return -EBUSY;
@@ -754,14 +754,17 @@ static int __nbd_ioctl(struct block_device *bdev, struct nbd_device *nbd, 
		if (num_connections > 1 &&

		    !(nbd->flags & NBD_FLAG_CAN_MULTI_CONN)) {

			dev_err(disk_to_dev(nbd->disk), "server does not support multiple connections per device.\n");

			error = -EINVAL;

			goto out_err;

		}



		set_bit(NBD_RUNNING, &nbd->runtime_flags);

		blk_mq_update_nr_hw_queues(&nbd->tag_set, nbd->num_connections);

		args = kcalloc(num_connections, sizeof(*args), GFP_KERNEL);

		if (!args)

		if (!args) {

			error = -ENOMEM;

			goto out_err;

		}

		nbd->task_recv = current;

		mutex_unlock(&nbd->config_lock);