get_device(shost->shost_gendev.parent) is called in
scsi_add_host_with_dma(), but its counter pair isn't called in the failure
path, so fix it by calling put_device(shost->shost_gendev.parent) in its
failure path.

Reported-by: John Garry <redacted>
Cc: Bart Van Assche <bvanassche@acm.org>
Cc: Hannes Reinecke <hare@suse.de>
Signed-off-by: Ming Lei <redacted>
---
  drivers/scsi/hosts.c | 1 +
  1 file changed, 1 insertion(+)

diff --git a/drivers/scsi/hosts.c b/drivers/scsi/hosts.c
index 6cbc3eb16525..6cc43c51b7b3 100644
--- a/drivers/scsi/hosts.c
+++ b/drivers/scsi/hosts.c

@@ -298,6 +298,7 @@ int scsi_add_host_with_dma(struct Scsi_Host *shost, struct device *dev,
   out_del_dev:
  	device_del(&shost->shost_dev);
   out_del_gendev:
+	put_device(shost->shost_gendev.parent);
  	device_del(&shost->shost_gendev);
   out_disable_runtime_pm:
  	device_disable_async_suspend(&shost->shost_gendev);