cxgb: delete non NAPI code from the driver.

Compile-tested only.

Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

3 files changed, 5 insertions, 75 deletions

diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index 4675c1bd6fb9..50ca1cf1271e 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -2378,14 +2378,6 @@ config CHELSIO_T1_1G
           Enables support for Chelsio's gigabit Ethernet PCI cards.  If you
           are using only 10G cards say 'N' here.
 
-config CHELSIO_T1_NAPI
-        bool "Use Rx Polling (NAPI)"
-        depends on CHELSIO_T1
-        default y
-        help
-          NAPI is a driver API designed to reduce CPU and interrupt load
-          when the driver is receiving lots of packets from the card.
-
 config CHELSIO_T3
         tristate "Chelsio Communications T3 10Gb Ethernet support"
         depends on PCI && INET
diff --git a/drivers/net/chelsio/cxgb2.c b/drivers/net/chelsio/cxgb2.c
index a509337eab2d..638c9a27a7a6 100644
--- a/drivers/net/chelsio/cxgb2.c
+++ b/drivers/net/chelsio/cxgb2.c
@@ -1153,9 +1153,7 @@ static int __devinit init_one(struct pci_dev *pdev,
 #ifdef CONFIG_NET_POLL_CONTROLLER
                 netdev->poll_controller = t1_netpoll;
 #endif
-#ifdef CONFIG_CHELSIO_T1_NAPI
                 netif_napi_add(netdev, &adapter->napi, t1_poll, 64);
-#endif
 
                 SET_ETHTOOL_OPS(netdev, &t1_ethtool_ops);
         }
diff --git a/drivers/net/chelsio/sge.c b/drivers/net/chelsio/sge.c
index 8a7efd38e95b..d6c7d2aa761b 100644
--- a/drivers/net/chelsio/sge.c
+++ b/drivers/net/chelsio/sge.c
@@ -1396,20 +1396,10 @@ static void sge_rx(struct sge *sge, struct freelQ *fl, unsigned int len)
 
         if (unlikely(adapter->vlan_grp && p->vlan_valid)) {
                 st->vlan_xtract++;
-#ifdef CONFIG_CHELSIO_T1_NAPI
-                        vlan_hwaccel_receive_skb(skb, adapter->vlan_grp,
-                                                 ntohs(p->vlan));
-#else
-                        vlan_hwaccel_rx(skb, adapter->vlan_grp,
-                                        ntohs(p->vlan));
-#endif
-        } else {
-#ifdef CONFIG_CHELSIO_T1_NAPI
+                vlan_hwaccel_receive_skb(skb, adapter->vlan_grp,
+                                         ntohs(p->vlan));
+        } else
                 netif_receive_skb(skb);
-#else
-                netif_rx(skb);
-#endif
-        }
 }
 
 /*
@@ -1568,7 +1558,6 @@ static inline int responses_pending(const struct adapter *adapter)
         return (e->GenerationBit == Q->genbit);
 }
 
-#ifdef CONFIG_CHELSIO_T1_NAPI
 /*
  * A simpler version of process_responses() that handles only pure (i.e.,
  * non data-carrying) responses.  Such respones are too light-weight to justify
@@ -1636,9 +1625,6 @@ int t1_poll(struct napi_struct *napi, int budget)
         return work_done;
 }
 
-/*
- * NAPI version of the main interrupt handler.
- */
 irqreturn_t t1_interrupt(int irq, void *data)
 {
         struct adapter *adapter = data;
@@ -1656,7 +1642,8 @@ irqreturn_t t1_interrupt(int irq, void *data)
                         else {
                                 /* no data, no NAPI needed */
                                 writel(sge->respQ.cidx, adapter->regs + A_SG_SLEEPING);
-                                napi_enable(&adapter->napi);    /* undo schedule_prep */
+                                /* undo schedule_prep */
+                                napi_enable(&adapter->napi);
                         }
                 }
                 return IRQ_HANDLED;
@@ -1672,53 +1659,6 @@ irqreturn_t t1_interrupt(int irq, void *data)
         return IRQ_RETVAL(handled != 0);
 }
 
-#else
-/*
- * Main interrupt handler, optimized assuming that we took a 'DATA'
- * interrupt.
- *
- * 1. Clear the interrupt
- * 2. Loop while we find valid descriptors and process them; accumulate
- *      information that can be processed after the loop
- * 3. Tell the SGE at which index we stopped processing descriptors
- * 4. Bookkeeping; free TX buffers, ring doorbell if there are any
- *      outstanding TX buffers waiting, replenish RX buffers, potentially
- *      reenable upper layers if they were turned off due to lack of TX
- *      resources which are available again.
- * 5. If we took an interrupt, but no valid respQ descriptors was found we
- *      let the slow_intr_handler run and do error handling.
- */
-irqreturn_t t1_interrupt(int irq, void *cookie)
-{
-        int work_done;
-        struct adapter *adapter = cookie;
-        struct respQ *Q = &adapter->sge->respQ;
-
-        spin_lock(&adapter->async_lock);
-
-        writel(F_PL_INTR_SGE_DATA, adapter->regs + A_PL_CAUSE);
-
-        if (likely(responses_pending(adapter)))
-                work_done = process_responses(adapter, -1);
-        else
-                work_done = t1_slow_intr_handler(adapter);
-
-        /*
-         * The unconditional clearing of the PL_CAUSE above may have raced
-         * with DMA completion and the corresponding generation of a response
-         * to cause us to miss the resulting data interrupt.  The next write
-         * is also unconditional to recover the missed interrupt and render
-         * this race harmless.
-         */
-        writel(Q->cidx, adapter->regs + A_SG_SLEEPING);
-
-        if (!work_done)
-                adapter->sge->stats.unhandled_irqs++;
-        spin_unlock(&adapter->async_lock);
-        return IRQ_RETVAL(work_done != 0);
-}
-#endif
-
 /*
  * Enqueues the sk_buff onto the cmdQ[qid] and has hardware fetch it.
  *