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xen-netback: correctly check failed allocation

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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>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Insu Yun 2015-10-15 18:02:28 +00:00 committed by David S. Miller
parent 80083a3c02
commit 833b8f18ad
1 changed files with 6 additions and 0 deletions
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6
drivers/net/xen-netback/xenbus.c
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@ -788,6 +788,12 @@ static void connect(struct backend_info *be)
/* Use the number of queues requested by the frontend */ /* Use the number of queues requested by the frontend */
be->vif->queues = vzalloc(requested_num_queues * be->vif->queues = vzalloc(requested_num_queues *
sizeof(struct xenvif_queue)); 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->num_queues = requested_num_queues;
be->vif->stalled_queues = requested_num_queues; be->vif->stalled_queues = requested_num_queues;