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qlcnic: protect resource access 

We do netif_device_attach, even if resource allocation fails.
Driver callbacks can be called, if device is attached.
All these callbacks need to be protected by ADAPTER_UP_MAGIC check.

Signed-off-by: Amit Kumar Salecha <amit.salecha@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Amit Kumar Salecha 2010-04-22 02:51:41 +00:00 committed by David S. Miller
parent ed6f1353e1
commit 780ab790f5
1 changed files with 11 additions and 0 deletions
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11
drivers/net/qlcnic/qlcnic_main.c
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@ -208,6 +208,9 @@ qlcnic_napi_enable(struct qlcnic_adapter *adapter)
struct qlcnic_host_sds_ring *sds_ring;
struct qlcnic_recv_context *recv_ctx = &adapter->recv_ctx;
if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
return;
for (ring = 0; ring < adapter->max_sds_rings; ring++) {
sds_ring = &recv_ctx->sds_rings[ring];
napi_enable(&sds_ring->napi);
@ -222,6 +225,9 @@ qlcnic_napi_disable(struct qlcnic_adapter *adapter)
struct qlcnic_host_sds_ring *sds_ring;
struct qlcnic_recv_context *recv_ctx = &adapter->recv_ctx;
if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
return;
for (ring = 0; ring < adapter->max_sds_rings; ring++) {
sds_ring = &recv_ctx->sds_rings[ring];
qlcnic_disable_int(sds_ring);
@ -1573,6 +1579,11 @@ qlcnic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
int frag_count, no_of_desc;
u32 num_txd = tx_ring->num_desc;
if (!test_bit(__QLCNIC_DEV_UP, &adapter->state)) {
netif_stop_queue(netdev);
return NETDEV_TX_BUSY;
}
frag_count = skb_shinfo(skb)->nr_frags + 1;
/* 4 fragments per cmd des */