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[S390] tape: duplicate sysfs filename when setting tape device online 

When a tape device is set online, offline and online again, the following
error message is printed on the console: "sysfs: duplicate filename
'non-rewinding' can not be created". The reason is that when setting a
device online, the tape driver creates a sysfs symlink from the tape device
to the tape class device. Unfortunately the symlink is not removed
correctly, when the device is set offline. Instead of passing the
tape device object to sysfs_remove_link, the class device object is used.
This patch fixes this problem and uses the correct tape device object now.

Signed-off-by: Michael Holzheu <holzheu@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
This commit is contained in:
Michael Holzheu 2008-04-17 07:46:05 +02:00 committed by Heiko Carstens
parent 00966c0a5b
commit 92bf435f38
3 changed files with 5 additions and 6 deletions
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4
drivers/s390/char/tape_char.c
View File

@ -83,9 +83,9 @@ tapechar_setup_device(struct tape_device * device)
void
tapechar_cleanup_device(struct tape_device *device)
{
unregister_tape_dev(device->rt);
unregister_tape_dev(&device->cdev->dev, device->rt);
device->rt = NULL;
unregister_tape_dev(device->nt);
unregister_tape_dev(&device->cdev->dev, device->nt);
device->nt = NULL;
}

5
drivers/s390/char/tape_class.c
View File

@ -99,11 +99,10 @@ fail_with_tcd:
}
EXPORT_SYMBOL(register_tape_dev);
void unregister_tape_dev(struct tape_class_device *tcd)
void unregister_tape_dev(struct device *device, struct tape_class_device *tcd)
{
if (tcd != NULL && !IS_ERR(tcd)) {
sysfs_remove_link(&tcd->class_device->kobj,
tcd->mode_name);
sysfs_remove_link(&device->kobj, tcd->mode_name);
device_destroy(tape_class, tcd->char_device->dev);
cdev_del(tcd->char_device);
kfree(tcd);

2
drivers/s390/char/tape_class.h
View File

@ -56,6 +56,6 @@ struct tape_class_device *register_tape_dev(
char * device_name,
char * node_name
);
void unregister_tape_dev(struct tape_class_device *tcd);
void unregister_tape_dev(struct device *device, struct tape_class_device *tcd);
#endif /* __TAPE_CLASS_H__ */