--- linux/drivers/ide/alim15x3.c~	2002-08-03 03:06:10.000000000 +0900
+++ linux/drivers/ide/alim15x3.c	2002-08-03 03:07:15.000000000 +0900
@@ -37,6 +37,7 @@
 static int ali_get_info(char *buffer, char **addr, off_t offset, int count);
 extern int (*ali_display_info)(char *, char **, off_t, int);  /* ide-proc.c */
 static struct pci_dev *bmide_dev;
+static int enable_south = 0;
 
 char *fifo[4] = {
 	"FIFO Off",
@@ -605,6 +606,7 @@
 		pci_read_config_byte(dev, 0x4b, &tmpbyte);
 		pci_write_config_byte(dev, 0x4b, tmpbyte | 0x08);
 
+		if( enable_south ){
 		/*
 		 * set south-bridge's enable bit, m1533, 0x79
 		 */
@@ -620,6 +622,7 @@
 			 */
 			pci_write_config_byte(isa_dev, 0x79, tmpbyte | 0x02);
 		}
+		}
 	} else {
 		/*
 		 * revision 0x20 (1543-E, 1543-F)
@@ -671,6 +674,7 @@
 		pci_read_config_byte(dev, 0x4b, &tmpbyte);
 		pci_write_config_byte(dev, 0x4b, tmpbyte | 0x08);
 
+		if( enable_south ){
 		/*
 		 * set south-bridge's enable bit, m1533, 0x79
 		 */
@@ -686,6 +690,7 @@
 			 */
 			pci_write_config_byte(isa_dev, 0x79, tmpbyte | 0x02);
 		}
+		}
 #endif /* ALI_INIT_CODE_TEST */
 		/*
 		 * Ultra66 cable detection (from Host View)
@@ -821,3 +826,13 @@
 	ide_setup_pci_device(dev, d);
 }
 
+static int __init enable_south_setup(char *str)
+{
+/*	printk("ALI15X3: enable_south_setup %d\n", str);        */
+	if(strcmp(str, "enable_south") == 0)
+		enable_south = 1;
+	return 1;
+}
+
+__setup("alim15x3=", enable_south_setup);
+