Move xen patchset to new version's subdir.

[people/pmueller/ipfire-2.x.git] / src / patches / suse-2.6.27.31 / patches.drivers / bnx2x-First-slow-path-interrupt-race.patch

From 0ef00459a638ae4f5d1e5326d3e50232fa80119f Mon Sep 17 00:00:00 2001
From: Eilon Greenstein <eilong@broadcom.com>
Date: Wed, 14 Jan 2009 21:31:08 -0800
Subject: bnx2x: First slow path interrupt race
Acked-by: Karsten Keil <kkeil@novell.com>
Reference: bnc#472500

The "read for interrupts" flag must be set before enabling slow-path
interrupts as well (and not just before fast-path interrupts)

Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/bnx2x_main.c |   18 +++++++++---------
 1 files changed, 9 insertions(+), 9 deletions(-)

Index: linux-2.6.27-bnx2x_2/drivers/net/bnx2x_main.c
===================================================================
--- linux-2.6.27-bnx2x_2.orig/drivers/net/bnx2x_main.c
+++ linux-2.6.27-bnx2x_2/drivers/net/bnx2x_main.c
@@ -4815,6 +4815,15 @@ static void bnx2x_nic_init(struct bnx2x 
 	bnx2x_init_context(bp);
 	bnx2x_init_internal(bp, load_code);
 	bnx2x_init_ind_table(bp);
+	bnx2x_stats_init(bp);
+
+	/* At this point, we are ready for interrupts */
+	atomic_set(&bp->intr_sem, 0);
+
+	/* flush all before enabling interrupts */
+	mb();
+	mmiowb();
+
 	bnx2x_int_enable(bp);
 }
 
@@ -6423,17 +6432,8 @@ static int bnx2x_nic_load(struct bnx2x *
 		}
 	}
 
-	bnx2x_stats_init(bp);
-
 	bp->state = BNX2X_STATE_OPENING_WAIT4_PORT;
 
-	/* Enable Rx interrupt handling before sending the ramrod
-	   as it's completed on Rx FP queue */
-	bnx2x_napi_enable(bp);
-
-	/* Enable interrupt handling */
-	atomic_set(&bp->intr_sem, 0);
-
 	rc = bnx2x_setup_leading(bp);
 	if (rc) {
 		BNX2X_ERR("Setup leading failed!\n");