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92bf435f38
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>
62 lines
1.6 KiB
C
62 lines
1.6 KiB
C
/*
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* (C) Copyright IBM Corp. 2004 All Rights Reserved.
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* tape_class.h
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*
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* Tape class device support
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*
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* Author: Stefan Bader <shbader@de.ibm.com>
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* Based on simple class device code by Greg K-H
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*/
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#ifndef __TAPE_CLASS_H__
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#define __TAPE_CLASS_H__
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/fs.h>
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#include <linux/major.h>
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#include <linux/kobject.h>
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#include <linux/kobj_map.h>
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#include <linux/cdev.h>
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#include <linux/device.h>
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#include <linux/kdev_t.h>
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#define TAPECLASS_NAME_LEN 32
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struct tape_class_device {
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struct cdev *char_device;
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struct device *class_device;
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char device_name[TAPECLASS_NAME_LEN];
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char mode_name[TAPECLASS_NAME_LEN];
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};
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/*
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* Register a tape device and return a pointer to the tape class device
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* created by the call.
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*
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* device
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* The pointer to the struct device of the physical (base) device.
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* dev
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* The intended major/minor number. The major number may be 0 to
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* get a dynamic major number.
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* fops
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* The pointer to the drivers file operations for the tape device.
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* device_name
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* Pointer to the logical device name (will also be used as kobject name
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* of the cdev). This can also be called the name of the tape class
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* device.
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* mode_name
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* Points to the name of the tape mode. This creates a link with that
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* name from the physical device to the logical device (class).
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*/
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struct tape_class_device *register_tape_dev(
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struct device * device,
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dev_t dev,
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const struct file_operations *fops,
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char * device_name,
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char * node_name
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);
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void unregister_tape_dev(struct device *device, struct tape_class_device *tcd);
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#endif /* __TAPE_CLASS_H__ */
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