pvcalls-front: fixes incorrect error handling

kfree() is incorrectly used to release the pages allocated by
__get_free_page() and __get_free_pages(). Use the matching deallocators
i.e., free_page() and free_pages(), respectively.

Signed-off-by: Pan Bian <bianpan2016@163.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Signed-off-by: Juergen Gross <jgross@suse.com>

diff --git a/drivers/xen/pvcalls-front.c b/drivers/xen/pvcalls-front.c
index 2f11ca72a281410122ef0b4f0dc4f173ef7c6697..77224d8f3e6fe6ee17cb06f81f20be18069422a9 100644 (file)
--- a/drivers/xen/pvcalls-front.c
+++ b/drivers/xen/pvcalls-front.c
@@ -385,8 +385,8 @@ static int create_active(struct sock_mapping *map, int *evtchn)
 out_error:
        if (*evtchn >= 0)
                xenbus_free_evtchn(pvcalls_front_dev, *evtchn);
-       kfree(map->active.data.in);
-       kfree(map->active.ring);
+       free_pages((unsigned long)map->active.data.in, PVCALLS_RING_ORDER);
+       free_page((unsigned long)map->active.ring);
        return ret;
 }