From e8ff4223f956013695e205d43a184f37922e43f0 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Fri, 24 Mar 2006 03:15:38 -0800
Subject: [PATCH] --- yaml --- r: 23390 b: refs/heads/master c:
 22bc685f4b93f4a0ce28e5829eaf754cb4f7c040 h: refs/heads/master v: v3

---
 [refs]                      |  2 +-
 trunk/drivers/scsi/in2000.c | 24 ++++++++++++++++++------
 2 files changed, 19 insertions(+), 7 deletions(-)

diff --git a/[refs] b/[refs]
index cc12483e2d1d..e0e7eec39be0 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: c818cb6406815716ab210ae15655ed94a973b15f
+refs/heads/master: 22bc685f4b93f4a0ce28e5829eaf754cb4f7c040
diff --git a/trunk/drivers/scsi/in2000.c b/trunk/drivers/scsi/in2000.c
index 34daa3e068de..9c519876f8a0 100644
--- a/trunk/drivers/scsi/in2000.c
+++ b/trunk/drivers/scsi/in2000.c
@@ -1898,6 +1898,21 @@ static int int_tab[] in2000__INITDATA = {
 	10
 };
 
+static int probe_bios(u32 addr, u32 *s1, uchar *switches)
+{
+	void __iomem *p = ioremap(addr, 0x34);
+	if (!p)
+		return 0;
+	*s1 = readl(p + 0x10);
+	if (*s1 == 0x41564f4e || readl(p + 0x30) == 0x61776c41) {
+		/* Read the switch image that's mapped into EPROM space */
+		*switches = ~readb(p + 0x20);
+		iounmap(p);
+		return 1;
+	}
+	iounmap(p);
+	return 0;
+}
 
 static int __init in2000_detect(struct scsi_host_template * tpnt)
 {
@@ -1930,6 +1945,7 @@ static int __init in2000_detect(struct scsi_host_template * tpnt)
 
 	detect_count = 0;
 	for (bios = 0; bios_tab[bios]; bios++) {
+		u32 s1 = 0;
 		if (check_setup_args("ioport", &val, buf)) {
 			base = val;
 			switches = ~inb(base + IO_SWITCHES) & 0xff;
@@ -1941,13 +1957,9 @@ static int __init in2000_detect(struct scsi_host_template * tpnt)
  * for the obvious ID strings. We look for the 2 most common ones and
  * hope that they cover all the cases...
  */
-		else if (isa_readl(bios_tab[bios] + 0x10) == 0x41564f4e || isa_readl(bios_tab[bios] + 0x30) == 0x61776c41) {
+		else if (probe_bios(bios_tab[bios], &s1, &switches)) {
 			printk("Found IN2000 BIOS at 0x%x ", (unsigned int) bios_tab[bios]);
 
-/* Read the switch image that's mapped into EPROM space */
-
-			switches = ~((isa_readb(bios_tab[bios] + 0x20) & 0xff));
-
 /* Find out where the IO space is */
 
 			x = switches & (SW_ADDR0 | SW_ADDR1);
@@ -2037,7 +2049,7 @@ static int __init in2000_detect(struct scsi_host_template * tpnt)
 
 /* Older BIOS's had a 'sync on/off' switch - use its setting */
 
-		if (isa_readl(bios_tab[bios] + 0x10) == 0x41564f4e && (switches & SW_SYNC_DOS5))
+		if (s1 == 0x41564f4e && (switches & SW_SYNC_DOS5))
 			hostdata->sync_off = 0x00;	/* sync defaults to on */
 		else
 			hostdata->sync_off = 0xff;	/* sync defaults to off */