IXP4xx: Ethernet and WAN drivers now support "high" hardware queues.

Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>

2 files changed, 15 insertions, 10 deletions

diff --git a/drivers/net/arm/ixp4xx_eth.c b/drivers/net/arm/ixp4xx_eth.c
index a740053d3af3..d304c731c470 100644
--- a/drivers/net/arm/ixp4xx_eth.c
+++ b/drivers/net/arm/ixp4xx_eth.c
@@ -456,7 +456,8 @@ static inline void queue_put_desc(unsigned int queue, u32 phys,
         debug_desc(phys, desc);
         BUG_ON(phys & 0x1F);
         qmgr_put_entry(queue, phys);
-        BUG_ON(qmgr_stat_overflow(queue));
+        /* Don't check for queue overflow here, we've allocated sufficient
+           length and queues >= 32 don't support this check anyway. */
 }
 
 
@@ -512,8 +513,8 @@ static int eth_poll(struct napi_struct *napi, int budget)
 #endif
                         napi_complete(napi);
                         qmgr_enable_irq(rxq);
-                        if (!qmgr_stat_empty(rxq) &&
-                            napi_reschedule(napi)) {
+                        if (!qmgr_stat_nearly_empty(rxq) &&
+                            napi_reschedule(napi)) { /* really empty in fact */
 #if DEBUG_RX
                                 printk(KERN_DEBUG "%s: eth_poll"
                                        " napi_reschedule successed\n",
@@ -630,7 +631,8 @@ static void eth_txdone_irq(void *unused)
                         port->tx_buff_tab[n_desc] = NULL;
                 }
 
-                start = qmgr_stat_empty(port->plat->txreadyq);
+                /* really empty in fact */
+                start = qmgr_stat_nearly_empty(port->plat->txreadyq);
                 queue_put_desc(port->plat->txreadyq, phys, desc);
                 if (start) {
 #if DEBUG_TX
@@ -708,13 +710,14 @@ static int eth_xmit(struct sk_buff *skb, struct net_device *dev)
         queue_put_desc(TX_QUEUE(port->id), tx_desc_phys(port, n), desc);
         dev->trans_start = jiffies;
 
-        if (qmgr_stat_empty(txreadyq)) {
+        if (qmgr_stat_nearly_empty(txreadyq)) { /* really empty in fact */
 #if DEBUG_TX
                 printk(KERN_DEBUG "%s: eth_xmit queue full\n", dev->name);
 #endif
                 netif_stop_queue(dev);
                 /* we could miss TX ready interrupt */
-                if (!qmgr_stat_empty(txreadyq)) {
+                /* really empty in fact */
+                if (!qmgr_stat_nearly_empty(txreadyq)) {
 #if DEBUG_TX
                         printk(KERN_DEBUG "%s: eth_xmit ready again\n",
                                dev->name);
diff --git a/drivers/net/wan/ixp4xx_hss.c b/drivers/net/wan/ixp4xx_hss.c
index 765a7f5d6aa4..1e56e58c6605 100644
--- a/drivers/net/wan/ixp4xx_hss.c
+++ b/drivers/net/wan/ixp4xx_hss.c
@@ -579,7 +579,8 @@ static inline void queue_put_desc(unsigned int queue, u32 phys,
         debug_desc(phys, desc);
         BUG_ON(phys & 0x1F);
         qmgr_put_entry(queue, phys);
-        BUG_ON(qmgr_stat_overflow(queue));
+        /* Don't check for queue overflow here, we've allocated sufficient
+           length and queues >= 32 don't support this check anyway. */
 }
 
 
@@ -789,7 +790,8 @@ static void hss_hdlc_txdone_irq(void *pdev)
                 free_buffer_irq(port->tx_buff_tab[n_desc]);
                 port->tx_buff_tab[n_desc] = NULL;
 
-                start = qmgr_stat_empty(port->plat->txreadyq);
+                /* really empty in fact */
+                start = qmgr_stat_nearly_empty(port->plat->txreadyq);
                 queue_put_desc(port->plat->txreadyq,
                                tx_desc_phys(port, n_desc), desc);
                 if (start) {
@@ -867,13 +869,13 @@ static int hss_hdlc_xmit(struct sk_buff *skb, struct net_device *dev)
         queue_put_desc(queue_ids[port->id].tx, tx_desc_phys(port, n), desc);
         dev->trans_start = jiffies;
 
-        if (qmgr_stat_empty(txreadyq)) {
+        if (qmgr_stat_nearly_empty(txreadyq)) { /* really empty in fact */
 #if DEBUG_TX
                 printk(KERN_DEBUG "%s: hss_hdlc_xmit queue full\n", dev->name);
 #endif
                 netif_stop_queue(dev);
                 /* we could miss TX ready interrupt */
-                if (!qmgr_stat_empty(txreadyq)) {
+                if (!qmgr_stat_nearly_empty(txreadyq)) {
 #if DEBUG_TX
                         printk(KERN_DEBUG "%s: hss_hdlc_xmit ready again\n",
                                dev->name);