tcmu: fix module removal due to stuck thread

We need to do a kthread_should_stop to check when kthread_stop has been
called.

This was a regression added in

b6df4b79a5514a9c6c53533436704129ef45bf76
tcmu: Add global data block pool support

so not sure if you wanted to merge it in with that patch or what.

Signed-off-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/target/target_core_user.c b/drivers/target/target_core_user.c
index 89b75ce563d8..9045837f748b 100644
--- a/drivers/target/target_core_user.c
+++ b/drivers/target/target_core_user.c
@@ -1560,6 +1560,9 @@ static int unmap_thread_fn(void *data)
                 schedule();
                 finish_wait(&unmap_wait, &__wait);
 
+                if (kthread_should_stop())
+                        break;
+
                 mutex_lock(&root_udev_mutex);
                 list_for_each_entry(udev, &root_udev, node) {
                         mutex_lock(&udev->cmdr_lock);