[PATCH 2/7] ide: fix ide_host_register() return value

[Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>]

Fix ide_host_register() to fail only if all ports cannot be registered.

While at it:

* Use host->ports[] instead of ide_hwifs[] and remove idx[].

There should be no functional changes caused by this patch.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>
---
 drivers/ide/ide-probe.c |   38 ++++++++++++++++++--------------------
 1 file changed, 18 insertions(+), 20 deletions(-)

Index: b/drivers/ide/ide-probe.c
===================================================================
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -1580,19 +1580,16 @@ int ide_host_register(struct ide_host *h
 		      hw_regs_t **hws)
 {
 	ide_hwif_t *hwif, *mate = NULL;
-	u8 idx[MAX_HWIFS];
-	int i, rc = 0;
+	int i, j = 0;
 
 	for (i = 0; i < MAX_HWIFS; i++) {
-		idx[i] = host->ports[i] ? host->ports[i]->index : 0xff;
+		hwif = host->ports[i];
 
-		if (idx[i] == 0xff) {
+		if (hwif == NULL) {
 			mate = NULL;
 			continue;
 		}
 
-		hwif = &ide_hwifs[idx[i]];
-
 		ide_init_port_hw(hwif, hws[i]);
 		ide_port_apply_params(hwif);
 
@@ -1614,10 +1611,10 @@ int ide_host_register(struct ide_host *h
 	}
 
 	for (i = 0; i < MAX_HWIFS; i++) {
-		if (idx[i] == 0xff)
-			continue;
+		hwif = host->ports[i];
 
-		hwif = &ide_hwifs[idx[i]];
+		if (hwif == NULL)
+			continue;
 
 		if (ide_probe_port(hwif) == 0)
 			hwif->present = 1;
@@ -1631,19 +1628,20 @@ int ide_host_register(struct ide_host *h
 	}
 
 	for (i = 0; i < MAX_HWIFS; i++) {
-		if (idx[i] == 0xff)
-			continue;
+		hwif = host->ports[i];
 
-		hwif = &ide_hwifs[idx[i]];
+		if (hwif == NULL)
+			continue;
 
 		if (hwif_init(hwif) == 0) {
 			printk(KERN_INFO "%s: failed to initialize IDE "
 					 "interface\n", hwif->name);
 			hwif->present = 0;
-			rc = -1;
 			continue;
 		}
 
+		j++;
+
 		if (hwif->present)
 			ide_port_setup_devices(hwif);
 
@@ -1654,10 +1652,10 @@ int ide_host_register(struct ide_host *h
 	}
 
 	for (i = 0; i < MAX_HWIFS; i++) {
-		if (idx[i] == 0xff)
-			continue;
+		hwif = host->ports[i];
 
-		hwif = &ide_hwifs[idx[i]];
+		if (hwif == NULL)
+			continue;
 
 		if (hwif->chipset == ide_unknown)
 			hwif->chipset = ide_generic;
@@ -1667,10 +1665,10 @@ int ide_host_register(struct ide_host *h
 	}
 
 	for (i = 0; i < MAX_HWIFS; i++) {
-		if (idx[i] == 0xff)
-			continue;
+		hwif = host->ports[i];
 
-		hwif = &ide_hwifs[idx[i]];
+		if (hwif == NULL)
+			continue;
 
 		ide_sysfs_register_port(hwif);
 		ide_proc_register_port(hwif);
@@ -1679,7 +1677,7 @@ int ide_host_register(struct ide_host *h
 			ide_proc_port_register_devices(hwif);
 	}
 
-	return rc;
+	return j ? 0 : -1;
 }
 EXPORT_SYMBOL_GPL(ide_host_register);
 
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