Messages in this thread Patch in this message | | | From | Insu Yun <> | Subject | [PATCH] xen-netback: correctly check failed allocation | Date | Thu, 15 Oct 2015 18:02:28 +0000 |
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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
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