From: Insu Yun <wuninsu@gmail.com>
To: ian.campbell@citrix.com, wei.liu2@citrix.com,
xen-devel@lists.xenproject.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org
Cc: taesoo@gatech.edu, yeongjin.jang@gatech.edu, insu@gatech.edu,
Insu Yun <wuninsu@gmail.com>
Subject: [PATCH] xen-netback: correctly check failed allocation
Date: Thu, 15 Oct 2015 18:02:28 +0000 [thread overview]
Message-ID: <1444932148-15633-1-git-send-email-wuninsu@gmail.com> (raw)
Since vzalloc can be failed in memory pressure,
writes -ENOMEM to xenstore to indicate error.
Signed-off-by: Insu Yun <wuninsu@gmail.com>
---
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 929a6e7..56ebd82 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;
--
1.9.1
next reply other threads:[~2015-10-15 18:01 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-15 18:02 Insu Yun [this message]
[not found] ` <CAGoFzNdCef+tutWgabSahHqV0rkC9FdNpjrQEsxk8GMeBA0TKQ@mail.gmail.com>
2015-10-16 9:05 ` Wei Liu
2015-10-16 9:28 ` Wei Liu
2015-10-16 9:40 ` [Xen-devel] " David Vrabel
2015-10-19 2:37 ` David Miller
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