From: Josef Bacik <jbacik@fb.com>
Date: Thu, 8 Dec 2016 14:52:35 +0000 (-0500)
Subject: nbd: reset the setup task for NBD_CLEAR_SOCK
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=20032ec38d1614f29c5a8e6cfc5b5326685fa99b;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

nbd: reset the setup task for NBD_CLEAR_SOCK

If an app exits before running NBD_DO_IT but after adding sockets we can
end up not being allowed to do a new nbd device.  Fix this by making
NBD_CLEAR_SOCK reset the setup_task.

Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
---

diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index bc78cbb2d18a..84ea5c2251e2 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -704,6 +704,7 @@ static int __nbd_ioctl(struct block_device *bdev, struct nbd_device *nbd,
 			kfree(nbd->socks);
 			nbd->socks = NULL;
 			nbd->num_connections = 0;
+			nbd->task_setup = NULL;
 		}
 		return 0;