[PATCH] various IDE patches/cleanups

[Davin McCall <davmac@ozonline.com.au>]

I've been doing some hacking on the IDE layer, just to fix a few issues I noticed going through the code. Due to the complex nature of the code I'm bound to have missed some things and perhaps misunderstood others. Nevertheless I'm posting these patches in the hope that they can be tested on other machines, rejected, or even accepted.

Comments and criticisms are welcome.

The first patch, below, is already included in the -mm tree. The further patches are appearing here for the first time.

All patches are against linux-2.6.0 but apply correctly against 2.6.2-rc2.

Davin

---
First patch: issues loading pci chipset drivers as modules. (don't let the module trash data structures used by current interfaces)


diff -urN linux-2.6.0-vanilla/drivers/ide/ide-probe.c linux-2.6.0/drivers/ide/ide-probe.c
--- linux-2.6.0-vanilla/drivers/ide/ide-probe.c	Thu Nov 27 07:44:24 2003
+++ linux-2.6.0/drivers/ide/ide-probe.c	Tue Jan  6 23:13:28 2004
@@ -1343,6 +1343,8 @@
 			int unit;
 			if (!hwif->present)
 				continue;
+			if (hwif->chipset == ide_unknown || hwif->chipset == ide_forced)
+				hwif->chipset = ide_generic;
 			for (unit = 0; unit < MAX_DRIVES; ++unit)
 				if (hwif->drives[unit].present)
 					ata_attach(&hwif->drives[unit]);
diff -urN linux-2.6.0-vanilla/drivers/ide/ide-proc.c linux-2.6.0/drivers/ide/ide-proc.c
--- linux-2.6.0-vanilla/drivers/ide/ide-proc.c	Thu Nov 27 07:44:17 2003
+++ linux-2.6.0/drivers/ide/ide-proc.c	Tue Jan  6 23:07:52 2004
@@ -348,8 +348,11 @@
 	int		len;
 	const char	*name;
 
+	/*
+	 *  Neither ide_unknown nor ide_forced should be set at this point.
+	 */
+	
 	switch (hwif->chipset) {
-		case ide_unknown:	name = "(none)";	break;
 		case ide_generic:	name = "generic";	break;
 		case ide_pci:		name = "pci";		break;
 		case ide_cmd640:	name = "cmd640";	break;
diff -urN linux-2.6.0-vanilla/drivers/ide/ide.c linux-2.6.0/drivers/ide/ide.c
--- linux-2.6.0-vanilla/drivers/ide/ide.c	Thu Nov 27 07:43:29 2003
+++ linux-2.6.0/drivers/ide/ide.c	Tue Jan  6 23:08:17 2004
@@ -2185,7 +2185,7 @@
 				memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
 				hwif->irq      = vals[2];
 				hwif->noprobe  = 0;
-				hwif->chipset  = ide_generic;
+				hwif->chipset  = ide_forced;
 				goto done;
 
 			case 0: goto bad_option;
diff -urN linux-2.6.0-vanilla/drivers/ide/pci/cmd640.c linux-2.6.0/drivers/ide/pci/cmd640.c
--- linux-2.6.0-vanilla/drivers/ide/pci/cmd640.c	Thu Nov 27 07:45:36 2003
+++ linux-2.6.0/drivers/ide/pci/cmd640.c	Tue Jan  6 13:07:51 2004
@@ -419,7 +419,7 @@
 	cmd_hwif1 = &ide_hwifs[1]; /* default, if not found below */
 	for (i = 0; i < MAX_HWIFS; i++) {
 		ide_hwif_t *hwif = &ide_hwifs[i];
-		if (hwif->chipset == ide_unknown || hwif->chipset == ide_generic) {
+		if (hwif->chipset == ide_unknown || hwif->chipset == ide_forced) {
 			if (hwif->io_ports[IDE_DATA_OFFSET] == 0x1f0)
 				cmd_hwif0 = hwif;
 			else if (hwif->io_ports[IDE_DATA_OFFSET] == 0x170)
diff -urN linux-2.6.0-vanilla/drivers/ide/setup-pci.c linux-2.6.0/drivers/ide/setup-pci.c
--- linux-2.6.0-vanilla/drivers/ide/setup-pci.c	Thu Nov 27 07:43:39 2003
+++ linux-2.6.0/drivers/ide/setup-pci.c	Tue Jan  6 23:18:50 2004
@@ -59,7 +59,7 @@
 	for (h = 0; h < MAX_HWIFS; ++h) {
 		hwif = &ide_hwifs[h];
 		if (hwif->io_ports[IDE_DATA_OFFSET] == io_base) {
-			if (hwif->chipset == ide_generic)
+			if (hwif->chipset == ide_forced)
 				return hwif; /* a perfect match */
 		}
 	}
diff -urN linux-2.6.0-vanilla/include/linux/ide.h linux-2.6.0/include/linux/ide.h
--- linux-2.6.0-vanilla/include/linux/ide.h	Thu Nov 27 07:43:36 2003
+++ linux-2.6.0/include/linux/ide.h	Tue Jan  6 23:06:23 2004
@@ -282,7 +282,7 @@
 		ide_pdc4030,	ide_rz1000,	ide_trm290,
 		ide_cmd646,	ide_cy82c693,	ide_4drives,
 		ide_pmac,	ide_etrax100,	ide_acorn,
-		ide_pc9800
+		ide_pc9800, ide_forced
 } hwif_chipset_t;
 
 /*