From: Pan Bian <bianpan2016@163.com>
Date: Mon, 5 Dec 2016 08:22:22 +0000 (+0800)
Subject: xen: xenbus: set error code on failure
X-Git-Tag: v4.10-rc1~137^2~6
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=2466d4b9d0c21e6c28cd63516dea65806bf5a307;p=karo-tx-linux.git

xen: xenbus: set error code on failure

Variable err is initialized with 0. As a result, the return value may
be 0 even if get_zeroed_page() fails to allocate memory. This patch fixes
the bug, initializing err with "-ENOMEM".

Signed-off-by: Pan Bian <bianpan2016@163.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
---

diff --git a/drivers/xen/xenbus/xenbus_probe.c b/drivers/xen/xenbus/xenbus_probe.c
index b5c1dec4a7c2..4bdf654041e9 100644
--- a/drivers/xen/xenbus/xenbus_probe.c
+++ b/drivers/xen/xenbus/xenbus_probe.c
@@ -702,7 +702,7 @@ device_initcall(xenbus_probe_initcall);
  */
 static int __init xenstored_local_init(void)
 {
-	int err = 0;
+	int err = -ENOMEM;
 	unsigned long page = 0;
 	struct evtchn_alloc_unbound alloc_unbound;