From: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Date: Mon, 15 Jun 2015 14:35:49 +0000 (+0530)
Subject: parport: fix error handling
X-Git-Tag: firefly_0821_release~176^2~1364^2~5
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=cabea695875e3a07313c205a9753c7416126dfa2;p=firefly-linux-kernel-4.4.55.git

parport: fix error handling

After registering the device if exclusive access fails for any reason
then we need to unregister the device to remove all references.

Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/parport/share.c b/drivers/parport/share.c
index 8067f54ce050..d8079e37a606 100644
--- a/drivers/parport/share.c
+++ b/drivers/parport/share.c
@@ -907,7 +907,8 @@ parport_register_dev_model(struct parport *port, const char *name,
 			spin_unlock(&port->physport->pardevice_lock);
 			pr_debug("%s: cannot grant exclusive access for device %s\n",
 				 port->name, name);
-			goto err_put_dev;
+			device_unregister(&par_dev->dev);
+			goto err_put_port;
 		}
 		port->flags |= PARPORT_FLAG_EXCL;
 	}