Rewind v3.13-rc3+ (78fd82238d0e5716) to v3.12

1 files changed, 49 insertions, 40 deletions

diff --git a/drivers/net/ethernet/freescale/gianfar.c b/drivers/net/ethernet/freescale/gianfar.c
index b14d790..9fbe4dd 100644
--- a/drivers/net/ethernet/freescale/gianfar.c
+++ b/drivers/net/ethernet/freescale/gianfar.c
@@ -78,8 +78,6 @@
 #include <linux/if_vlan.h>
 #include <linux/spinlock.h>
 #include <linux/mm.h>
-#include <linux/of_address.h>
-#include <linux/of_irq.h>
 #include <linux/of_mdio.h>
 #include <linux/of_platform.h>
 #include <linux/ip.h>
@@ -2920,7 +2918,7 @@ static int gfar_poll(struct napi_struct *napi, int budget)
 	struct gfar_priv_rx_q *rx_queue = NULL;
 	int work_done = 0, work_done_per_q = 0;
 	int i, budget_per_q = 0;
-	int has_tx_work = 0;
+	int has_tx_work;
 	unsigned long rstat_rxf;
 	int num_act_queues;
 
@@ -2935,51 +2933,62 @@ static int gfar_poll(struct napi_struct *napi, int budget)
 	if (num_act_queues)
 		budget_per_q = budget/num_act_queues;
 
-	for_each_set_bit(i, &gfargrp->tx_bit_map, priv->num_tx_queues) {
-		tx_queue = priv->tx_queue[i];
-		/* run Tx cleanup to completion */
-		if (tx_queue->tx_skbuff[tx_queue->skb_dirtytx]) {
-			gfar_clean_tx_ring(tx_queue);
-			has_tx_work = 1;
+	while (1) {
+		has_tx_work = 0;
+		for_each_set_bit(i, &gfargrp->tx_bit_map, priv->num_tx_queues) {
+			tx_queue = priv->tx_queue[i];
+			/* run Tx cleanup to completion */
+			if (tx_queue->tx_skbuff[tx_queue->skb_dirtytx]) {
+				gfar_clean_tx_ring(tx_queue);
+				has_tx_work = 1;
+			}
 		}
-	}
 
-	for_each_set_bit(i, &gfargrp->rx_bit_map, priv->num_rx_queues) {
-		/* skip queue if not active */
-		if (!(rstat_rxf & (RSTAT_CLEAR_RXF0 >> i)))
-			continue;
-
-		rx_queue = priv->rx_queue[i];
-		work_done_per_q =
-			gfar_clean_rx_ring(rx_queue, budget_per_q);
-		work_done += work_done_per_q;
-
-		/* finished processing this queue */
-		if (work_done_per_q < budget_per_q) {
-			/* clear active queue hw indication */
-			gfar_write(&regs->rstat,
-				   RSTAT_CLEAR_RXF0 >> i);
-			num_act_queues--;
-
-			if (!num_act_queues)
-				break;
+		for_each_set_bit(i, &gfargrp->rx_bit_map, priv->num_rx_queues) {
+			/* skip queue if not active */
+			if (!(rstat_rxf & (RSTAT_CLEAR_RXF0 >> i)))
+				continue;
+
+			rx_queue = priv->rx_queue[i];
+			work_done_per_q =
+				gfar_clean_rx_ring(rx_queue, budget_per_q);
+			work_done += work_done_per_q;
+
+			/* finished processing this queue */
+			if (work_done_per_q < budget_per_q) {
+				/* clear active queue hw indication */
+				gfar_write(&regs->rstat,
+					   RSTAT_CLEAR_RXF0 >> i);
+				rstat_rxf &= ~(RSTAT_CLEAR_RXF0 >> i);
+				num_act_queues--;
+
+				if (!num_act_queues)
+					break;
+				/* recompute budget per Rx queue */
+				budget_per_q =
+					(budget - work_done) / num_act_queues;
+			}
 		}
-	}
 
-	if (!num_act_queues && !has_tx_work) {
+		if (work_done >= budget)
+			break;
 
-		napi_complete(napi);
+		if (!num_act_queues && !has_tx_work) {
 
-		/* Clear the halt bit in RSTAT */
-		gfar_write(&regs->rstat, gfargrp->rstat);
+			napi_complete(napi);
 
-		gfar_write(&regs->imask, IMASK_DEFAULT);
+			/* Clear the halt bit in RSTAT */
+			gfar_write(&regs->rstat, gfargrp->rstat);
 
-		/* If we are coalescing interrupts, update the timer
-		 * Otherwise, clear it
-		 */
-		gfar_configure_coalescing(priv, gfargrp->rx_bit_map,
-					  gfargrp->tx_bit_map);
+			gfar_write(&regs->imask, IMASK_DEFAULT);
+
+			/* If we are coalescing interrupts, update the timer
+			 * Otherwise, clear it
+			 */
+			gfar_configure_coalescing(priv, gfargrp->rx_bit_map,
+						  gfargrp->tx_bit_map);
+			break;
+		}
 	}
 
 	return work_done;