[PATCH] don't force enable generic IDE controllers

Fixes hangs on Micron Samurai boards

drivers/ide/pci/generic.c

 /*
- *  linux/drivers/ide/generic.c		Version 0.10	Sept 11, 2002
+ *  linux/drivers/ide/pci/generic.c	Version 0.11	December 30, 2002
  *
  *  Copyright (C) 2001-2002	Andre Hedrick <andre@linux-ide.org>
+ *  Portions (C) Copyright 2002  Red Hat Inc <alan@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * For the avoidance of doubt the "preferred form" of this code is one which
+ * is in an open non patent encumbered format. Where cryptographic key signing
+ * forms part of the process of creating an executable the information
+ * including keys needed to generate an equivalently functional executable
+ * are deemed to be part of the source code.
  */
 
-
 #undef REALLY_SLOW_IO		/* most systems can safely undef this */
 
 #include <linux/config.h> /* for CONFIG_BLK_DEV_IDEPCI */
@@ -89,6 +105,7 @@ extern void ide_setup_pci_device(struct pci_dev *, ide_pci_device_t *);
 static int __devinit generic_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 {
 	ide_pci_device_t *d = &generic_chipsets[id->driver_data];
+	u16 command;
 
 	if (dev->device != d->device)
 		BUG();
@@ -102,6 +119,12 @@ static int __devinit generic_init_one(struct pci_dev *dev, const struct pci_devi
 	    (!(PCI_FUNC(dev->devfn) & 1)))
 		return 1;
 
+	pci_read_config_word(dev, PCI_COMMAND, &command);
+	if(!(command & PCI_COMMAND_IO))
+	{
+		printk(KERN_INFO "Skipping disabled %s IDE controller.\n", d->name);
+		return 1; 
+	}
 	ide_setup_pci_device(dev, d);
 	MOD_INC_USE_COUNT;
 	return 0;