From: Johan Hovold <johan@kernel.org>
Date: Tue, 1 Nov 2016 15:26:03 +0000 (+0100)
Subject: powerpc/pci/rpadlpar: Fix device reference leaks
X-Git-Tag: v3.10.106~181
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b734c02b4ccd6307232278eb4cc908aa962be4a4;p=thirdparty%2Fkernel%2Fstable.git

powerpc/pci/rpadlpar: Fix device reference leaks

commit 99e5cde5eae78bef95bfe7c16ccda87fb070149b upstream.

Make sure to drop any device reference taken by vio_find_node() when
adding and removing virtual I/O slots.

Fixes: 5eeb8c63a38f ("[PATCH] PCI Hotplug: rpaphp: Move VIO registration")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Willy Tarreau <w@1wt.eu>
---

diff --git a/drivers/pci/hotplug/rpadlpar_core.c b/drivers/pci/hotplug/rpadlpar_core.c
index b29e20b7862f1..ffb2de5c4d50b 100644
--- a/drivers/pci/hotplug/rpadlpar_core.c
+++ b/drivers/pci/hotplug/rpadlpar_core.c
@@ -259,8 +259,13 @@ static int dlpar_add_phb(char *drc_name, struct device_node *dn)
 
 static int dlpar_add_vio_slot(char *drc_name, struct device_node *dn)
 {
-	if (vio_find_node(dn))
+	struct vio_dev *vio_dev;
+
+	vio_dev = vio_find_node(dn);
+	if (vio_dev) {
+		put_device(&vio_dev->dev);
 		return -EINVAL;
+	}
 
 	if (!vio_register_device_node(dn)) {
 		printk(KERN_ERR
@@ -336,6 +341,9 @@ static int dlpar_remove_vio_slot(char *drc_name, struct device_node *dn)
 		return -EINVAL;
 
 	vio_unregister_device(vio_dev);
+
+	put_device(&vio_dev->dev);
+
 	return 0;
 }