[PATCH] per-drive IDE deregistration

loops in ide_cdrom_init()/ide_cdrom_exit(), etc. are pulled into
ide_register_module()/ide_unregister_module() resp.

drivers/ide/ide-cd.c

@@ -3150,28 +3150,12 @@ int ide_cdrom_reinit (ide_drive_t *drive)
 
 static void __exit ide_cdrom_exit(void)
 {
-	ide_drive_t *drive;
-	int failed = 0;
-
-	while ((drive = ide_scan_devices (&ide_cdrom_driver, failed)) != NULL)
-		if (ide_cdrom_cleanup (drive)) {
-			printk ("%s: cleanup_module() called while still busy\n", drive->name);
-			failed++;
-		}
 	ide_unregister_module (&ide_cdrom_module);
 }
  
 static int ide_cdrom_init(void)
 {
-	ide_drive_t *drive;
-	int failed = 0;
-
 	MOD_INC_USE_COUNT;
-	while ((drive = ide_scan_devices (NULL, failed++)) != NULL) {
-		if (ide_cdrom_reinit(drive))
-			continue;
-		failed--;
-	}
 	ide_register_module(&ide_cdrom_module);
 	MOD_DEC_USE_COUNT;
 	return 0;

drivers/ide/ide-disk.c

@@ -1717,35 +1717,12 @@ int idedisk_reinit(ide_drive_t *drive)
 
 static void __exit idedisk_exit (void)
 {
-	ide_drive_t *drive;
-	int failed = 0;
-
-	while ((drive = ide_scan_devices(&idedisk_driver, failed)) != NULL) {
-		if (idedisk_cleanup (drive)) {
-			printk (KERN_ERR "%s: cleanup_module() called while still busy\n", drive->name);
-			failed++;
-		}
-		/* We must remove proc entries defined in this module.
-		   Otherwise we oops while accessing these entries */
-#ifdef CONFIG_PROC_FS
-		if (drive->proc)
-			ide_remove_proc_entries(drive->proc, idedisk_proc);
-#endif
-	}
 	ide_unregister_module(&idedisk_module);
 }
 
 static int idedisk_init (void)
 {
-	ide_drive_t *drive;
-	int failed = 0;
-	
 	MOD_INC_USE_COUNT;
-	while ((drive = ide_scan_devices(NULL, failed++)) != NULL) {
-		if (idedisk_reinit(drive))
-			continue;
-		failed--;
-	}
 	ide_register_module(&idedisk_module);
 	MOD_DEC_USE_COUNT;
 	return 0;

drivers/ide/ide-floppy.c

@@ -2233,21 +2233,6 @@ MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
 
 static void __exit idefloppy_exit (void)
 {
-	ide_drive_t *drive;
-	int failed = 0;
-
-	while ((drive = ide_scan_devices(&idefloppy_driver, failed)) != NULL) {
-		if (idefloppy_cleanup (drive)) {
-			printk ("%s: cleanup_module() called while still busy\n", drive->name);
-			failed++;
-		}
-		/* We must remove proc entries defined in this module.
-		   Otherwise we oops while accessing these entries */
-#ifdef CONFIG_PROC_FS
-		if (drive->proc)
-			ide_remove_proc_entries(drive->proc, idefloppy_proc);
-#endif
-	}
 	ide_unregister_module(&idefloppy_module);
 }
 
@@ -2256,16 +2241,8 @@ static void __exit idefloppy_exit (void)
  */
 static int idefloppy_init (void)
 {
-	ide_drive_t *drive;
-	int failed = 0;
-
 	printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
 	MOD_INC_USE_COUNT;
-	while ((drive = ide_scan_devices(NULL, failed++)) != NULL) {
-		if (idefloppy_reinit(drive))
-			continue;
-		failed--;
-	}
 	ide_register_module(&idefloppy_module);
 	MOD_DEC_USE_COUNT;
 	return 0;

drivers/ide/ide-tape.c

@@ -6272,11 +6272,6 @@ static int idetape_cleanup (ide_drive_t *drive)
 	devfs_unregister(tape->de_r);
 	devfs_unregister(tape->de_n);
 	kfree (tape);
-	for (minor = 0; minor < MAX_HWIFS * MAX_DRIVES; minor++)
-		if (idetape_chrdevs[minor].drive != NULL)
-			return 0;
-	unregister_chrdev(IDETAPE_MAJOR, "ht");
-	idetape_chrdev_present = 0;
 	return 0;
 }
 
@@ -6427,15 +6422,9 @@ MODULE_LICENSE("GPL");
 
 static void __exit idetape_exit (void)
 {
-	ide_drive_t *drive;
-	int minor;
-
-	for (minor = 0; minor < MAX_HWIFS * MAX_DRIVES; minor++) {
-		drive = idetape_chrdevs[minor].drive;
-		if (drive != NULL && idetape_cleanup (drive))
-		printk(KERN_ERR "ide-tape: %s: cleanup_module() called while still busy\n", drive->name);
-	}
 	ide_unregister_module(&idetape_module);
+	unregister_chrdev(IDETAPE_MAJOR, "ht");
+	idetape_chrdev_present = 0;
 }
 
 /*
@@ -6443,30 +6432,15 @@ static void __exit idetape_exit (void)
  */
 static int idetape_init (void)
 {
-	ide_drive_t *drive;
-	int minor, failed = 0, supported = 0;
-/* DRIVER(drive)->busy++; */
 	MOD_INC_USE_COUNT;
 	if (!idetape_chrdev_present) {
+		idetape_chrdev_present = 1;
 		if (register_chrdev(IDETAPE_MAJOR, "ht", &idetape_fops)) {
 			printk(KERN_ERR "ide-tape: Failed to register character device interface\n");
 			MOD_DEC_USE_COUNT;
 			return -EBUSY;
 		}
-		for (minor = 0; minor < MAX_HWIFS * MAX_DRIVES; minor++)
-			idetape_chrdevs[minor].drive = NULL;
 	}
-
-	while ((drive = ide_scan_devices(NULL, failed++))) {
-		if (idetape_reinit(drive))
-			continue;
-		supported++;
-		failed--;
-	}
-	if (!idetape_chrdev_present && !supported) {
-		unregister_chrdev(IDETAPE_MAJOR, "ht");
-	} else
-		idetape_chrdev_present = 1;
 	ide_register_module(&idetape_module);
 	MOD_DEC_USE_COUNT;
 	return 0;

drivers/ide/ide.c

@@ -3511,7 +3511,7 @@ static void setup_driver_defaults (ide_drive_t *drive)
 	if (d->reinit == NULL)		d->reinit = default_reinit;
 }
 
-ide_drive_t *ide_scan_devices(ide_driver_t *driver, int n)
+static ide_drive_t *ide_scan_devices(ide_driver_t *driver, int n)
 {
 	unsigned int unit, index, i;
 
@@ -3594,12 +3594,20 @@ int ide_unregister_subdriver (ide_drive_t *drive)
 
 int ide_register_module (ide_module_t *module)
 {
-	ide_module_t *p = ide_modules;
+	ide_driver_t *driver = module->info;
+	ide_module_t *p;
+	ide_drive_t *drive;
+	int failed = 0;
 
-	while (p) {
+	while ((drive = ide_scan_devices (NULL, failed++)) != NULL) {
+		if (driver->reinit(drive))
+			continue;
+		failed--;
+	}
+
+	for (p = ide_modules; p; p = p->next) {
 		if (p == module)
 			return 1;
-		p = p->next;
 	}
 	module->next = ide_modules;
 	ide_modules = module;
@@ -3609,7 +3617,23 @@ int ide_register_module (ide_module_t *module)
 
 void ide_unregister_module (ide_module_t *module)
 {
+	ide_driver_t *driver = module->info;
 	ide_module_t **p;
+	ide_drive_t *drive;
+	int failed = 0;
+
+	while ((drive = ide_scan_devices(driver, failed)) != NULL) {
+		if (driver->cleanup(drive)) {
+			printk ("%s: cleanup_module() called while still busy\n", drive->name);
+			failed++;
+		}
+		/* We must remove proc entries defined in this module.
+		   Otherwise we oops while accessing these entries */
+#ifdef CONFIG_PROC_FS
+		if (drive->proc)
+			ide_remove_proc_entries(drive->proc, driver->proc);
+#endif
+	}
 
 	for (p = &ide_modules; (*p) && (*p) != module; p = &((*p)->next));
 	if (*p)
@@ -3648,7 +3672,6 @@ EXPORT_SYMBOL(do_ide_request);
 /*
  * Driver module
  */
-EXPORT_SYMBOL(ide_scan_devices);
 EXPORT_SYMBOL(ide_register_subdriver);
 EXPORT_SYMBOL(ide_unregister_subdriver);
 EXPORT_SYMBOL(ide_replace_subdriver);

drivers/scsi/ide-scsi.c

@@ -614,8 +614,7 @@ static int idescsi_reinit(ide_drive_t *drive)
  */
 static int idescsi_init (void)
 {
-	ide_drive_t *drive;
-	int i, failed;
+	int i;
 
 	if (idescsi_initialized)
 		return 0;
@@ -623,12 +622,6 @@ static int idescsi_init (void)
 	for (i = 0; i < MAX_HWIFS * MAX_DRIVES; i++)
 		idescsi_drives[i] = NULL;
 	MOD_INC_USE_COUNT;
-	failed = 0;
-	while ((drive = ide_scan_devices(NULL, failed++)) != NULL) {
-		if (idescsi_reinit(drive))
-			continue;
-		failed--;
-	}
 	ide_register_module(&idescsi_module);
 	MOD_DEC_USE_COUNT;
 	return 0;
@@ -886,16 +879,7 @@ static int __init init_idescsi_module(void)
 
 static void __exit exit_idescsi_module(void)
 {
-	ide_drive_t *drive;
-	int failed;
-
 	scsi_unregister_host(&idescsi_template);
-	failed = 0;
-	while ((drive = ide_scan_devices(&idescsi_driver, failed)) != NULL)
-		if (idescsi_cleanup (drive)) {
-			printk ("%s: exit_idescsi_module() called while still busy\n", drive->name);
-			failed++;
-		}
 	ide_unregister_module(&idescsi_module);
 }
 

include/linux/ide.h

@@ -1237,7 +1237,6 @@ int idescsi_reinit (ide_drive_t *drive);
 
 int ide_register_module (ide_module_t *module);
 void ide_unregister_module (ide_module_t *module);
-ide_drive_t *ide_scan_devices(ide_driver_t *driver, int n);
 int ide_register_subdriver (ide_drive_t *drive, ide_driver_t *driver, int version);
 int ide_unregister_subdriver (ide_drive_t *drive);
 int ide_replace_subdriver(ide_drive_t *drive, const char *driver);