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hw/net/xen_nic.c: Free 'netdev->txs' when map 'netdev->rxs' fails

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When map 'netdev->rxs' fails, need free the original resource, or will
cause resource leak.

Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Chen Gang 2014-12-17 04:48:54 +08:00 committed by Stefan Hajnoczi
parent 57407ea44c
commit b4f72e31b9
1 changed files with 6 additions and 1 deletions
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7
hw/net/xen_nic.c
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@ -370,11 +370,16 @@ static int net_connect(struct XenDevice *xendev)
netdev->xendev.dom,
netdev->tx_ring_ref,
PROT_READ | PROT_WRITE);
if (!netdev->txs) {
return -1;
}
netdev->rxs = xc_gnttab_map_grant_ref(netdev->xendev.gnttabdev,
netdev->xendev.dom,
netdev->rx_ring_ref,
PROT_READ | PROT_WRITE);
if (!netdev->txs || !netdev->rxs) {
if (!netdev->rxs) {
xc_gnttab_munmap(netdev->xendev.gnttabdev, netdev->txs, 1);
netdev->txs = NULL;
return -1;
}
BACK_RING_INIT(&netdev->tx_ring, netdev->txs, XC_PAGE_SIZE);