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Commit d5dee80a authored by Will Dyson's avatar Will Dyson Committed by Greg Kroah-Hartman
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[PATCH] add sysfs support for ide tape 



I was recently given an old Travan tape drive and asked to do something
useful with it.  The ide-scsi + st (+serverworks ide controller) combo
results in a hard lockup of the machine which I have not had the energy to
debug, so I turned to ide-tape (which seems to work).  The system in
question debian stable, using udev to manage /dev.

The following patch to ide-tape.c allows udev to create the cdev nodes for
my drive.

Cc: Gadi Oxman <gadio@netvision.net.il>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 3dc7c555

drivers/ide/ide-tape.c

+36 −2
Original line number Diff line number Diff line
@@ -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);
@@ -4878,6 +4884,11 @@ static int ide_tape_probe(struct device *dev) 


	idetape_setup(drive, tape, minor);



	class_device_create(idetape_sysfs_class,

			MKDEV(IDETAPE_MAJOR, minor), dev, "%s", tape->name);

	class_device_create(idetape_sysfs_class,

			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);
@@ -4903,6 +4914,7 @@ 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");

}
@@ -4911,11 +4923,33 @@ static void __exit idetape_exit (void) 
 */

static int 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_init(idetape_init);