cxgb4vf: Fix check to use new User Doorbell mechanism

If we don't have access to the new User GTS (T5+), use the old doorbell
mechanism; otherwise use the new BAR2 mechanism.

Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/chelsio/cxgb4vf/sge.c b/drivers/net/ethernet/chelsio/cxgb4vf/sge.c
index ad53e5a..1d5e77a 100644 (file)
--- a/drivers/net/ethernet/chelsio/cxgb4vf/sge.c
+++ b/drivers/net/ethernet/chelsio/cxgb4vf/sge.c
@@ -1898,7 +1898,10 @@ static int napi_rx_handler(struct napi_struct *napi, int budget)
                rspq->unhandled_irqs++;
 
        val = CIDXINC_V(work_done) | SEINTARM_V(intr_params);
-       if (is_t4(rspq->adapter->params.chip)) {
+       /* If we don't have access to the new User GTS (T5+), use the old
+        * doorbell mechanism; otherwise use the new BAR2 mechanism.
+        */
+       if (unlikely(!rspq->bar2_addr)) {
                t4_write_reg(rspq->adapter,
                             T4VF_SGE_BASE_ADDR + SGE_VF_GTS,
                             val | INGRESSQID_V((u32)rspq->cntxt_id));
@@ -1998,10 +2001,13 @@ static unsigned int process_intrq(struct adapter *adapter)
        }
 
        val = CIDXINC_V(work_done) | SEINTARM_V(intrq->intr_params);
-       if (is_t4(adapter->params.chip))
+       /* If we don't have access to the new User GTS (T5+), use the old
+        * doorbell mechanism; otherwise use the new BAR2 mechanism.
+        */
+       if (unlikely(!intrq->bar2_addr)) {
                t4_write_reg(adapter, T4VF_SGE_BASE_ADDR + SGE_VF_GTS,
                             val | INGRESSQID_V(intrq->cntxt_id));
-       else {
+       } else {
                writel(val | INGRESSQID_V(intrq->bar2_qid),
                       intrq->bar2_addr + SGE_UDB_GTS);
                wmb();