[PATCH] fbdev: Reduce stack usage

[linux-2.6-omap-h63xx.git] / drivers / ide / ide-tape.c

diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index ee38e6b143a4c2f453386d21f19f646217bf1f74..fab9b2b025044728e5d80a53d929e7d9715ba36a 100644 (file)
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -1013,6 +1013,8 @@ typedef struct ide_tape_obj {
 
 static DECLARE_MUTEX(idetape_ref_sem);
 
+static struct class *idetape_sysfs_class;
+
 #define to_ide_tape(obj) container_of(obj, struct ide_tape_obj, kref)
 
 #define ide_tape_g(disk) \
@@ -4704,6 +4706,10 @@ static void ide_tape_release(struct kref *kref)
 
        drive->dsc_overlap = 0;
        drive->driver_data = NULL;
+       class_device_destroy(idetape_sysfs_class,
+                       MKDEV(IDETAPE_MAJOR, tape->minor));
+       class_device_destroy(idetape_sysfs_class,
+                       MKDEV(IDETAPE_MAJOR, tape->minor + 128));
        devfs_remove("%s/mt", drive->devfs_name);
        devfs_remove("%s/mtn", drive->devfs_name);
        devfs_unregister_tape(g->number);
@@ -4742,8 +4748,8 @@ static ide_proc_entry_t idetape_proc[] = {
 static int ide_tape_probe(struct device *);
 
 static ide_driver_t idetape_driver = {
-       .owner                  = THIS_MODULE,
        .gen_driver = {
+               .owner          = THIS_MODULE,
                .name           = "ide-tape",
                .bus            = &ide_bus_type,
                .probe          = ide_tape_probe,
@@ -4844,7 +4850,7 @@ static int ide_tape_probe(struct device *dev)
                printk(KERN_WARNING "ide-tape: Use drive %s with ide-scsi emulation and osst.\n", drive->name);
                printk(KERN_WARNING "ide-tape: OnStream support will be removed soon from ide-tape!\n");
        }
-       tape = (idetape_tape_t *) kmalloc (sizeof (idetape_tape_t), GFP_KERNEL);
+       tape = (idetape_tape_t *) kzalloc (sizeof (idetape_tape_t), GFP_KERNEL);
        if (tape == NULL) {
                printk(KERN_ERR "ide-tape: %s: Can't allocate a tape structure\n", drive->name);
                goto failed;
@@ -4858,8 +4864,6 @@ static int ide_tape_probe(struct device *dev)
 
        ide_register_subdriver(drive, &idetape_driver);
 
-       memset(tape, 0, sizeof(*tape));
-
        kref_init(&tape->kref);
 
        tape->drive = drive;
@@ -4878,6 +4882,11 @@ static int ide_tape_probe(struct device *dev)
 
        idetape_setup(drive, tape, minor);
 
+       class_device_create(idetape_sysfs_class, NULL,
+                       MKDEV(IDETAPE_MAJOR, minor), dev, "%s", tape->name);
+       class_device_create(idetape_sysfs_class, NULL,
+                       MKDEV(IDETAPE_MAJOR, minor + 128), dev, "n%s", tape->name);
+
        devfs_mk_cdev(MKDEV(HWIF(drive)->major, minor),
                        S_IFCHR | S_IRUGO | S_IWUGO,
                        "%s/mt", drive->devfs_name);
@@ -4903,21 +4912,42 @@ MODULE_LICENSE("GPL");
 static void __exit idetape_exit (void)
 {
        driver_unregister(&idetape_driver.gen_driver);
+       class_destroy(idetape_sysfs_class);
        unregister_chrdev(IDETAPE_MAJOR, "ht");
 }
 
-/*
- *     idetape_init will register the driver for each tape.
- */
-static int idetape_init (void)
+static int __init idetape_init(void)
 {
+       int error = 1;
+       idetape_sysfs_class = class_create(THIS_MODULE, "ide_tape");
+       if (IS_ERR(idetape_sysfs_class)) {
+               idetape_sysfs_class = NULL;
+               printk(KERN_ERR "Unable to create sysfs class for ide tapes\n");
+               error = -EBUSY;
+               goto out;
+       }
+
        if (register_chrdev(IDETAPE_MAJOR, "ht", &idetape_fops)) {
                printk(KERN_ERR "ide-tape: Failed to register character device interface\n");
-               return -EBUSY;
+               error = -EBUSY;
+               goto out_free_class;
        }
-       return driver_register(&idetape_driver.gen_driver);
+
+       error = driver_register(&idetape_driver.gen_driver);
+       if (error)
+               goto out_free_driver;
+
+       return 0;
+
+out_free_driver:
+       driver_unregister(&idetape_driver.gen_driver);
+out_free_class:
+       class_destroy(idetape_sysfs_class);
+out:
+       return error;
 }
 
+MODULE_ALIAS("ide:*m-tape*");
 module_init(idetape_init);
 module_exit(idetape_exit);
 MODULE_ALIAS_CHARDEV_MAJOR(IDETAPE_MAJOR);