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path: root/drivers/usb/common/roles.c
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Diffstat (limited to 'drivers/usb/common/roles.c')
-rw-r--r--drivers/usb/common/roles.c15
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/usb/common/roles.c b/drivers/usb/common/roles.c
index 15cc76e22123..99116af07f1d 100644
--- a/drivers/usb/common/roles.c
+++ b/drivers/usb/common/roles.c
@@ -109,8 +109,15 @@ static void *usb_role_switch_match(struct device_connection *con, int ep,
*/
struct usb_role_switch *usb_role_switch_get(struct device *dev)
{
- return device_connection_find_match(dev, "usb-role-switch", NULL,
- usb_role_switch_match);
+ struct usb_role_switch *sw;
+
+ sw = device_connection_find_match(dev, "usb-role-switch", NULL,
+ usb_role_switch_match);
+
+ if (!IS_ERR_OR_NULL(sw))
+ WARN_ON(!try_module_get(sw->dev.parent->driver->owner));
+
+ return sw;
}
EXPORT_SYMBOL_GPL(usb_role_switch_get);
@@ -122,8 +129,10 @@ EXPORT_SYMBOL_GPL(usb_role_switch_get);
*/
void usb_role_switch_put(struct usb_role_switch *sw)
{
- if (!IS_ERR_OR_NULL(sw))
+ if (!IS_ERR_OR_NULL(sw)) {
put_device(&sw->dev);
+ module_put(sw->dev.parent->driver->owner);
+ }
}
EXPORT_SYMBOL_GPL(usb_role_switch_put);