From: Chad Dupuis <cdupuis@redhat.com>
Date: Tue, 3 Aug 2010 13:51:56 -0400
Subject: [net] netxen: remove unnecessary size checks
Message-id: <20100803134912.2239.78940.sendpatchset@localhost.localdomain>
Patchwork-id: 27339
O-Subject: [RHEL 5.6 PATCH 37/44] netxen: remove unnecessary size checks
Bugzilla: 562937
RH-Acked-by: David S. Miller <davem@redhat.com>
RH-Acked-by: Neil Horman <nhorman@redhat.com>

Bugzilla
========

562937

Upstream Status
===============

net-2.6 commit id 215387a4b51f346418c285176f752ccf3609b6fb

Description
===========

>From 544487c256f1ecee0adafde127ad61d2ec4690b5 Mon Sep 17 00:00:00 2001
From: Sucheta Chakraborty <sucheta.chakraborty@qlogic.com>
Date: Tue, 11 May 2010 23:53:03 +0000
Subject: [PATCH] netxen: remove unnecessary size checks

NX3031 have 64bit on card memory. Fix the limit check to
64MB and remove unnecessary 128bit read/write check.

Signed-off-by: Sucheta Chakraborty <sucheta.chakraborty@qlogic.com>
Signed-off-by: Amit Kumar Salecha <amit.salecha@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/netxen/netxen_nic_hdr.h b/drivers/net/netxen/netxen_nic_hdr.h
index d930068..d8bd73d 100644
--- a/drivers/net/netxen/netxen_nic_hdr.h
+++ b/drivers/net/netxen/netxen_nic_hdr.h
@@ -681,14 +681,8 @@ enum {
 #define MIU_TEST_AGT_ADDR_HI		(0x08)
 #define MIU_TEST_AGT_WRDATA_LO		(0x10)
 #define MIU_TEST_AGT_WRDATA_HI		(0x14)
-#define MIU_TEST_AGT_WRDATA_UPPER_LO	(0x20)
-#define MIU_TEST_AGT_WRDATA_UPPER_HI	(0x24)
-#define MIU_TEST_AGT_WRDATA(i)		(0x10+(0x10*((i)>>1))+(4*((i)&1)))
 #define MIU_TEST_AGT_RDDATA_LO		(0x18)
 #define MIU_TEST_AGT_RDDATA_HI		(0x1c)
-#define MIU_TEST_AGT_RDDATA_UPPER_LO	(0x28)
-#define MIU_TEST_AGT_RDDATA_UPPER_HI	(0x2c)
-#define MIU_TEST_AGT_RDDATA(i)		(0x18+(0x10*((i)>>1))+(4*((i)&1)))
 
 #define MIU_TEST_AGT_ADDR_MASK		0xfffffff8
 #define MIU_TEST_AGT_UPPER_ADDR(off)	(0)
diff --git a/drivers/net/netxen/netxen_nic_hw.c b/drivers/net/netxen/netxen_nic_hw.c
index 25b9fc4..8e94fd6 100644
--- a/drivers/net/netxen/netxen_nic_hw.c
+++ b/drivers/net/netxen/netxen_nic_hw.c
@@ -1610,9 +1610,8 @@ static int
 netxen_nic_pci_mem_write_2M(struct netxen_adapter *adapter,
 		u64 off, u64 data)
 {
-	int i, j, ret;
+	int j, ret;
 	u32 temp, off8;
-	u64 stride;
 	void __iomem *mem_crb;
 
 	/* Only 64-bit aligned access */
@@ -1639,44 +1638,17 @@ netxen_nic_pci_mem_write_2M(struct netxen_adapter *adapter,
 	return -EIO;
 
 correct:
-	stride = NX_IS_REVISION_P3P(adapter->ahw.revision_id) ? 16 : 8;
-
-	off8 = off & ~(stride-1);
+	off8 = off & 0xfffffff8;
 
 	spin_lock(&adapter->ahw.mem_lock);
 
 	writel(off8, (mem_crb + MIU_TEST_AGT_ADDR_LO));
 	writel(0, (mem_crb + MIU_TEST_AGT_ADDR_HI));
 
-	i = 0;
-	if (stride == 16) {
-		writel(TA_CTL_ENABLE, (mem_crb + TEST_AGT_CTRL));
-		writel((TA_CTL_START | TA_CTL_ENABLE),
-				(mem_crb + TEST_AGT_CTRL));
-
-		for (j = 0; j < MAX_CTL_CHECK; j++) {
-			temp = readl(mem_crb + TEST_AGT_CTRL);
-			if ((temp & TA_CTL_BUSY) == 0)
-				break;
-		}
-
-		if (j >= MAX_CTL_CHECK) {
-			ret = -EIO;
-			goto done;
-		}
-
-		i = (off & 0xf) ? 0 : 2;
-		writel(readl(mem_crb + MIU_TEST_AGT_RDDATA(i)),
-				mem_crb + MIU_TEST_AGT_WRDATA(i));
-		writel(readl(mem_crb + MIU_TEST_AGT_RDDATA(i+1)),
-				mem_crb + MIU_TEST_AGT_WRDATA(i+1));
-		i = (off & 0xf) ? 2 : 0;
-	}
-
 	writel(data & 0xffffffff,
-			mem_crb + MIU_TEST_AGT_WRDATA(i));
+			mem_crb + MIU_TEST_AGT_WRDATA_LO);
 	writel((data >> 32) & 0xffffffff,
-			mem_crb + MIU_TEST_AGT_WRDATA(i+1));
+			mem_crb + MIU_TEST_AGT_WRDATA_HI);
 
 	writel((TA_CTL_ENABLE | TA_CTL_WRITE), (mem_crb + TEST_AGT_CTRL));
 	writel((TA_CTL_START | TA_CTL_ENABLE | TA_CTL_WRITE),
@@ -1696,7 +1668,6 @@ correct:
 	} else
 		ret = 0;
 
-done:
 	spin_unlock(&adapter->ahw.mem_lock);
 
 	return ret;
@@ -1708,7 +1679,7 @@ netxen_nic_pci_mem_read_2M(struct netxen_adapter *adapter,
 {
 	int j, ret;
 	u32 temp, off8;
-	u64 val, stride;
+	u64 val;
 	void __iomem *mem_crb;
 
 	/* Only 64-bit aligned access */
@@ -1737,9 +1708,7 @@ netxen_nic_pci_mem_read_2M(struct netxen_adapter *adapter,
 	return -EIO;
 
 correct:
-	stride = NX_IS_REVISION_P3P(adapter->ahw.revision_id) ? 16 : 8;
-
-	off8 = off & ~(stride-1);
+	off8 = off & 0xfffffff8;
 
 	spin_lock(&adapter->ahw.mem_lock);
 
@@ -1760,13 +1729,8 @@ correct:
 					"failed to read through agent\n");
 		ret = -EIO;
 	} else {
-		off8 = MIU_TEST_AGT_RDDATA_LO;
-		if ((stride == 16) && (off & 0xf))
-			off8 = MIU_TEST_AGT_RDDATA_UPPER_LO;
-
-		temp = readl(mem_crb + off8 + 4);
-		val = (u64)temp << 32;
-		val |= readl(mem_crb + off8);
+		val = (u64)(readl(mem_crb + MIU_TEST_AGT_RDDATA_HI)) << 32;
+		val |= readl(mem_crb + MIU_TEST_AGT_RDDATA_LO);
 		*data = val;
 		ret = 0;
 	}