diff options
| author |   Dongli Zhang <dongli.zhang@oracle.com> | 2016-10-31 13:38:29 +0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2016-10-31 16:05:32 -0400 |
| commit | 87557efc27f6a50140fb20df06a917f368ce3c66 (patch) | |
| tree | 655648d282d40aac011d0adfa08ef362c97bde05 /drivers/net | |
| parent | Merge tag 'wireless-drivers-for-davem-2016-10-30' of git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers (diff) | |
| download | linux-dev-87557efc27f6a50140fb20df06a917f368ce3c66.tar.xz linux-dev-87557efc27f6a50140fb20df06a917f368ce3c66.zip | |
xen-netfront: do not cast grant table reference to signed short
While grant reference is of type uint32_t, xen-netfront erroneously casts
it to signed short in BUG_ON().
This would lead to the xen domU panic during boot-up or migration when it
is attached with lots of paravirtual devices.
Signed-off-by: Dongli Zhang <dongli.zhang@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/xen-netfront.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c index e17879dd5d5a..189a28dcd80d 100644 --- a/drivers/net/xen-netfront.c +++ b/drivers/net/xen-netfront.c @@ -304,7 +304,7 @@ static void xennet_alloc_rx_buffers(struct netfront_queue *queue) queue->rx_skbs[id] = skb; ref = gnttab_claim_grant_reference(&queue->gref_rx_head); - BUG_ON((signed short)ref < 0); + WARN_ON_ONCE(IS_ERR_VALUE((unsigned long)ref)); queue->grant_rx_ref[id] = ref; page = skb_frag_page(&skb_shinfo(skb)->frags[0]); @@ -428,7 +428,7 @@ static void xennet_tx_setup_grant(unsigned long gfn, unsigned int offset, id = get_id_from_freelist(&queue->tx_skb_freelist, queue->tx_skbs); tx = RING_GET_REQUEST(&queue->tx, queue->tx.req_prod_pvt++); ref = gnttab_claim_grant_reference(&queue->gref_tx_head); - BUG_ON((signed short)ref < 0); + WARN_ON_ONCE(IS_ERR_VALUE((unsigned long)ref)); gnttab_grant_foreign_access_ref(ref, queue->info->xbdev->otherend_id, gfn, GNTMAP_readonly); |