netdev - [PATCH 3/3] remove irq

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Date:	Mon, 19 Feb 2007 20:12:52 -0500
From:	"Chris Snook" <csnook@...hat.com>
To:	jeff@...zik.org, jacliburn@...lsouth.net, csnook@...hat.com,
	john.ronciak@...el.com, jesse.brandeburg@...el.com,
	auke-jan.h.kok@...el.com
Cc:	netdev@...r.kernel.org
Subject: [PATCH 3/3] remove irq_sem from ixgb

From: Chris Snook <csnook@...hat.com>

Remove irq_sem from ixgb.  Currently untested, but similar to tested patches
on atl1 and e1000.

Signed-off-by: Chris Snook <csnook@...hat.com>
--
diff -urp linux-2.6.20-git14.orig/drivers/net/ixgb/ixgb.h
linux-2.6.20-git14/drivers/net/ixgb/ixgb.h
--- linux-2.6.20-git14.orig/drivers/net/ixgb/ixgb.h	2007-02-19
14:32:16.000000000 -0500
+++ linux-2.6.20-git14/drivers/net/ixgb/ixgb.h	2007-02-19 15:04:50.000000000
-0500
@@ -161,7 +161,6 @@ struct ixgb_adapter {
 	uint16_t link_speed;
 	uint16_t link_duplex;
 	spinlock_t tx_lock;
-	atomic_t irq_sem;
 	struct work_struct tx_timeout_task;

 	struct timer_list blink_timer;
diff -urp linux-2.6.20-git14.orig/drivers/net/ixgb/ixgb_main.c
linux-2.6.20-git14/drivers/net/ixgb/ixgb_main.c
--- linux-2.6.20-git14.orig/drivers/net/ixgb/ixgb_main.c	2007-02-19
14:32:16.000000000 -0500
+++ linux-2.6.20-git14/drivers/net/ixgb/ixgb_main.c	2007-02-19
15:06:52.000000000 -0500
@@ -201,7 +201,6 @@ module_exit(ixgb_exit_module);
 static void
 ixgb_irq_disable(struct ixgb_adapter *adapter)
 {
-	atomic_inc(&adapter->irq_sem);
 	IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
 	IXGB_WRITE_FLUSH(&adapter->hw);
 	synchronize_irq(adapter->pdev->irq);
@@ -215,12 +214,10 @@ ixgb_irq_disable(struct ixgb_adapter *ad
 static void
 ixgb_irq_enable(struct ixgb_adapter *adapter)
 {
-	if(atomic_dec_and_test(&adapter->irq_sem)) {
-		IXGB_WRITE_REG(&adapter->hw, IMS,
-			       IXGB_INT_RXT0 | IXGB_INT_RXDMT0 | IXGB_INT_TXDW |
-			       IXGB_INT_LSC);
-		IXGB_WRITE_FLUSH(&adapter->hw);
-	}
+	IXGB_WRITE_REG(&adapter->hw, IMS,
+		       IXGB_INT_RXT0 | IXGB_INT_RXDMT0 | IXGB_INT_TXDW |
+		       IXGB_INT_LSC);
+	IXGB_WRITE_FLUSH(&adapter->hw);
 }

 int
@@ -584,7 +581,6 @@ ixgb_sw_init(struct ixgb_adapter *adapte
 	/* enable flow control to be programmed */
 	hw->fc.send_xon = 1;

-	atomic_set(&adapter->irq_sem, 1);
 	spin_lock_init(&adapter->tx_lock);

 	return 0;
@@ -1755,7 +1751,6 @@ ixgb_intr(int irq, void *data)
 		  of the posted write is intentionally left out.
 		*/

-		atomic_inc(&adapter->irq_sem);
 		IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
 		__netif_rx_schedule(netdev);
 	}

-
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