From 833b8f18adfcca04070a8a42d545a4553379d36f Mon Sep 17 00:00:00 2001
From: Insu Yun <wuninsu@gmail.com>
Date: Thu, 15 Oct 2015 18:02:28 +0000
Subject: [PATCH] xen-netback: correctly check failed allocation
Since vzalloc can be failed in memory pressure,
writes -ENOMEM to xenstore to indicate error.
Signed-off-by: Insu Yun <wuninsu@gmail.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/xen-netback/xenbus.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/net/xen-netback/xenbus.c b/drivers/net/xen-netback/xenbus.c
index 929a6e7e5ecfe..56ebd8267386e 100644
--- a/drivers/net/xen-netback/xenbus.c
+++ b/drivers/net/xen-netback/xenbus.c
@@ -788,6 +788,12 @@ static void connect(struct backend_info *be)
/* Use the number of queues requested by the frontend */
be->vif->queues = vzalloc(requested_num_queues *
sizeof(struct xenvif_queue));
+ if (!be->vif->queues) {
+ xenbus_dev_fatal(dev, -ENOMEM,
+ "allocating queues");
+ return;
+ }
+
be->vif->num_queues = requested_num_queues;
be->vif->stalled_queues = requested_num_queues;
--
GitLab