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bnx2x: Prevent null pointer dereference in AFEX mode 

The cnic module is responsible for initializing various bnx2x structs
via callbacks provided by the bnx2x module.
One such struct is the queue object for the FCoE queue.

If a device is working in AFEX mode and its configuration allows FCoE yet
the cnic module is not loaded, it's very likely a null pointer dereference
will occur, as the bnx2x will erroneously access the FCoE's queue object.

Prevent said access until cnic properly registers itself.

Signed-off-by: Yuval Mintz <yuvalmin@broadcom.com>
Signed-off-by: Ariel Elior <ariele@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Yuval Mintz 2013-04-10 13:34:39 +03:00 committed by David S. Miller
parent 61a0f6efc8
commit fea7564534
1 changed files with 2 additions and 1 deletions
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3
drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
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@ -4947,7 +4947,7 @@ static void bnx2x_after_function_update(struct bnx2x *bp)
q);
}
if (!NO_FCOE(bp)) {
if (!NO_FCOE(bp) && CNIC_ENABLED(bp)) {
fp = &bp->fp[FCOE_IDX(bp)];
queue_params.q_obj = &bnx2x_sp_obj(bp, fp).q_obj;
@ -13354,6 +13354,7 @@ static int bnx2x_unregister_cnic(struct net_device *dev)
RCU_INIT_POINTER(bp->cnic_ops, NULL);
mutex_unlock(&bp->cnic_mutex);
synchronize_rcu();
bp->cnic_enabled = false;
kfree(bp->cnic_kwq);
bp->cnic_kwq = NULL;