linux-kernel - [PATCH 8/9] qd65xx: return error value in qd

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Date:	Sat, 16 Feb 2008 21:27:22 +0100
From:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
To:	linux-ide@...r.kernel.org
Cc:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 8/9] qd65xx: return error value in qd_probe()

Return error value in qd_probe() and use it in qd65xx_init()
instead of checking ide_hwifs[].chipset.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
---
 drivers/ide/legacy/qd65xx.c |   25 +++++++++++++++----------
 1 file changed, 15 insertions(+), 10 deletions(-)

Index: b/drivers/ide/legacy/qd65xx.c
===================================================================
--- a/drivers/ide/legacy/qd65xx.c
+++ b/drivers/ide/legacy/qd65xx.c
@@ -396,7 +396,7 @@ static int __init qd_probe(int base)
 	config = inb(QD_CONFIG_PORT);
 
 	if (! ((config & QD_CONFIG_BASEPORT) >> 1 == (base == 0xb0)) )
-		return 1;
+		return -ENODEV;
 
 	unit = ! (config & QD_CONFIG_IDE_BASEPORT);
 
@@ -410,7 +410,8 @@ static int __init qd_probe(int base)
 
 	if ((config & 0xf0) == QD_CONFIG_QD6500) {
 
-		if (qd_testreg(base)) return 1;		/* bad register */
+		if (qd_testreg(base))
+			 return -ENODEV;	/* bad register */
 
 		/* qd6500 found */
 
@@ -421,7 +422,7 @@ static int __init qd_probe(int base)
 		
 		if (config & QD_CONFIG_DISABLED) {
 			printk(KERN_WARNING "qd6500 is disabled !\n");
-			return 1;
+			return -ENODEV;
 		}
 
 		ide_init_port_hw(hwif, &hw[unit]);
@@ -443,8 +444,8 @@ static int __init qd_probe(int base)
 
 		u8 control;
 
-		if (qd_testreg(base) || qd_testreg(base+0x02)) return 1;
-			/* bad registers */
+		if (qd_testreg(base) || qd_testreg(base + 0x02))
+			return -ENODEV;	/* bad registers */
 
 		/* qd6580 found */
 
@@ -508,7 +509,7 @@ static int __init qd_probe(int base)
 		}
 	}
 	/* no qd65xx found */
-	return 1;
+	return -ENODEV;
 }
 
 int probe_qd65xx = 0;
@@ -518,14 +519,18 @@ MODULE_PARM_DESC(probe, "probe for QD65x
 
 static int __init qd65xx_init(void)
 {
+	int rc1, rc2 = -ENODEV;
+
 	if (probe_qd65xx == 0)
 		return -ENODEV;
 
-	if (qd_probe(0x30))
-		qd_probe(0xb0);
-	if (ide_hwifs[0].chipset != ide_qd65xx &&
-	    ide_hwifs[1].chipset != ide_qd65xx)
+	rc1 = qd_probe(0x30);
+	if (rc1)
+		rc2 = qd_probe(0xb0);
+
+	if (rc1 < 0 && rc2 < 0)
 		return -ENODEV;
+
 	return 0;
 }
 
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