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be2net: Fix INTx processing for Lancer 

Lancer does not have HW registers to indicate the EQ causing the INTx
interrupt. As a result EQE entries of one EQ may be consumed when interrupt
is caused by another EQ. Fix this by arming CQs at the end of NAPI poll
routine to regenerate the EQEs.

Signed-off-by: Padmanabh Ratnakar <padmanabh.ratnakar@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Padmanabh Ratnakar 2011-12-19 01:53:35 +00:00 committed by David S. Miller
parent 81259c6124
commit 93c86700c0
1 changed files with 9 additions and 1 deletions
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10
drivers/net/ethernet/emulex/benet/be_main.c
View File

@ -1970,6 +1970,7 @@ static int be_poll_tx_mcc(struct napi_struct *napi, int budget)
struct be_eq_obj *tx_eq = container_of(napi, struct be_eq_obj, napi);
struct be_adapter *adapter =
container_of(tx_eq, struct be_adapter, tx_eq);
struct be_mcc_obj *mcc_obj = &adapter->mcc_obj;
struct be_tx_obj *txo;
struct be_eth_tx_compl *txcp;
int tx_compl, mcc_compl, status = 0;
@ -2006,12 +2007,19 @@ static int be_poll_tx_mcc(struct napi_struct *napi, int budget)
mcc_compl = be_process_mcc(adapter, &status);
if (mcc_compl) {
struct be_mcc_obj *mcc_obj = &adapter->mcc_obj;
be_cq_notify(adapter, mcc_obj->cq.id, true, mcc_compl);
}
napi_complete(napi);
/* Arm CQ again to regenerate EQEs for Lancer in INTx mode */
if (lancer_chip(adapter) && !msix_enabled(adapter)) {
for_all_tx_queues(adapter, txo, i)
be_cq_notify(adapter, txo->cq.id, true, 0);
be_cq_notify(adapter, mcc_obj->cq.id, true, 0);
}
be_eq_notify(adapter, tx_eq->q.id, true, false, 0);
adapter->drv_stats.tx_events++;
return 1;