From feffa5cc7b47f38210d4997ceb3fe30881d6c337 Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Tue, 22 Nov 2016 19:09:45 -0700 Subject: [PATCH] nbd: fix setting of 'error' in NBD_DO_IT ioctl Multiple paths don't set it properly, ensure that we do. Fixes: 9561a7ade0c2 ("nbd: add multi-connection support") Signed-off-by: Jens Axboe --- drivers/block/nbd.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c index e683e2241cbd..dc722a7adf58 100644 --- a/drivers/block/nbd.c +++ b/drivers/block/nbd.c @@ -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); -- 2.20.1