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device_schedule_callback() needs a module reference

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This patch (as896b) fixes an oversight in the design of
device_schedule_callback().  It is necessary to acquire a reference to the
module owning the callback routine, to prevent the module from being
unloaded before the callback can run.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Cc: Satyam Sharma <satyam.sharma@gmail.com>
Cc: Neil Brown <neilb@suse.de>
Cc: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Stern 2007-04-26 00:12:04 -07:00 • committed by Greg Kroah-Hartman
parent fa1a8c23eb
commit 523ded71de
4 changed files with 29 additions and 13 deletions
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4
include/linux/sysfs.h
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@ -80,7 +80,7 @@ struct sysfs_ops {
#ifdef CONFIG_SYSFS
extern int sysfs_schedule_callback(struct kobject *kobj,
void (*func)(void *), void *data);
void (*func)(void *), void *data, struct module *owner);
extern int __must_check
sysfs_create_dir(struct kobject *, struct dentry *);
@ -137,7 +137,7 @@ extern int __must_check sysfs_init(void);
#else /* CONFIG_SYSFS */
static inline int sysfs_schedule_callback(struct kobject *kobj,
void (*func)(void *), void *data)
void (*func)(void *), void *data, struct module *owner)
{
return -ENOSYS;
}