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authorWill Dyson <will.dyson@gmail.com>2005-09-16 02:55:07 -0700
committerGreg Kroah-Hartman <gregkh@suse.de>2005-10-28 09:52:50 -0700
commitd5dee80ad69439ad8dccf8fa4d7fed0068aec9cf (patch)
treee7983a7c7dce4213431a1b951d3d803167ed41f9
parent3dc7c555636e46bb64b4da3570a345f4b247eaf0 (diff)
[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: Andrew Morton <akpm@osdl.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-rw-r--r--drivers/ide/ide-tape.c38
1 files changed, 36 insertions, 2 deletions
diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index ee38e6b143a..95abe981530 100644
--- 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);
@@ -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);