X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Fmtd%2Fmtdcore.c;h=9905870f56e5e0c6ced0dcb53c5f0d6f8128ee47;hb=cc169158e75d370ff961e5653a326a7ee1688b6b;hp=9c0315d1b1c4f59fa7ffd123b2c0e9063ea529b5;hpb=207e0a826fdee4bfe853681aef2175a739c11286;p=linux-2.6.git diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c index 9c0315d1b..9905870f5 100644 --- a/drivers/mtd/mtdcore.c +++ b/drivers/mtd/mtdcore.c @@ -1,5 +1,5 @@ /* - * $Id: mtdcore.c,v 1.44 2004/11/16 18:28:59 dwmw2 Exp $ + * $Id: mtdcore.c,v 1.47 2005/11/07 11:14:20 gleixner Exp $ * * Core registration and callback routines for MTD * drivers and users. @@ -19,15 +19,13 @@ #include #include #include -#ifdef CONFIG_PROC_FS #include -#endif #include -/* These are exported solely for the purpose of mtd_blkdevs.c. You +/* These are exported solely for the purpose of mtd_blkdevs.c. You should not use them for _anything_ else */ -DECLARE_MUTEX(mtd_table_mutex); +DEFINE_MUTEX(mtd_table_mutex); struct mtd_info *mtd_table[MAX_MTD_DEVICES]; EXPORT_SYMBOL_GPL(mtd_table_mutex); @@ -49,7 +47,7 @@ int add_mtd_device(struct mtd_info *mtd) { int i; - down(&mtd_table_mutex); + mutex_lock(&mtd_table_mutex); for (i=0; i < MAX_MTD_DEVICES; i++) if (!mtd_table[i]) { @@ -66,8 +64,8 @@ int add_mtd_device(struct mtd_info *mtd) struct mtd_notifier *not = list_entry(this, struct mtd_notifier, list); not->add(mtd); } - - up(&mtd_table_mutex); + + mutex_unlock(&mtd_table_mutex); /* We _know_ we aren't being removed, because our caller is still holding us here. So none of this try_ nonsense, and no bitching about it @@ -75,8 +73,8 @@ int add_mtd_device(struct mtd_info *mtd) __module_get(THIS_MODULE); return 0; } - - up(&mtd_table_mutex); + + mutex_unlock(&mtd_table_mutex); return 1; } @@ -93,13 +91,13 @@ int add_mtd_device(struct mtd_info *mtd) int del_mtd_device (struct mtd_info *mtd) { int ret; - - down(&mtd_table_mutex); + + mutex_lock(&mtd_table_mutex); if (mtd_table[mtd->index] != mtd) { ret = -ENODEV; } else if (mtd->usecount) { - printk(KERN_NOTICE "Removing MTD device #%d (%s) with use count %d\n", + printk(KERN_NOTICE "Removing MTD device #%d (%s) with use count %d\n", mtd->index, mtd->name, mtd->usecount); ret = -EBUSY; } else { @@ -118,7 +116,7 @@ int del_mtd_device (struct mtd_info *mtd) ret = 0; } - up(&mtd_table_mutex); + mutex_unlock(&mtd_table_mutex); return ret; } @@ -135,22 +133,22 @@ void register_mtd_user (struct mtd_notifier *new) { int i; - down(&mtd_table_mutex); + mutex_lock(&mtd_table_mutex); list_add(&new->list, &mtd_notifiers); __module_get(THIS_MODULE); - + for (i=0; i< MAX_MTD_DEVICES; i++) if (mtd_table[i]) new->add(mtd_table[i]); - up(&mtd_table_mutex); + mutex_unlock(&mtd_table_mutex); } /** - * register_mtd_user - unregister a 'user' of MTD devices. - * @new: pointer to notifier info structure + * unregister_mtd_user - unregister a 'user' of MTD devices. + * @old: pointer to notifier info structure * * Removes a callback function pair from the list of 'users' to be * notified upon addition or removal of MTD devices. Causes the @@ -162,16 +160,16 @@ int unregister_mtd_user (struct mtd_notifier *old) { int i; - down(&mtd_table_mutex); + mutex_lock(&mtd_table_mutex); module_put(THIS_MODULE); for (i=0; i< MAX_MTD_DEVICES; i++) if (mtd_table[i]) old->remove(mtd_table[i]); - + list_del(&old->list); - up(&mtd_table_mutex); + mutex_unlock(&mtd_table_mutex); return 0; } @@ -187,13 +185,13 @@ int unregister_mtd_user (struct mtd_notifier *old) * both, return the num'th driver only if its address matches. Return NULL * if not. */ - + struct mtd_info *get_mtd_device(struct mtd_info *mtd, int num) { struct mtd_info *ret = NULL; int i; - down(&mtd_table_mutex); + mutex_lock(&mtd_table_mutex); if (num == -1) { for (i=0; i< MAX_MTD_DEVICES; i++) @@ -211,7 +209,7 @@ struct mtd_info *get_mtd_device(struct mtd_info *mtd, int num) if (ret) ret->usecount++; - up(&mtd_table_mutex); + mutex_unlock(&mtd_table_mutex); return ret; } @@ -219,9 +217,9 @@ void put_mtd_device(struct mtd_info *mtd) { int c; - down(&mtd_table_mutex); + mutex_lock(&mtd_table_mutex); c = --mtd->usecount; - up(&mtd_table_mutex); + mutex_unlock(&mtd_table_mutex); BUG_ON(c < 0); module_put(mtd->owner); @@ -296,43 +294,11 @@ EXPORT_SYMBOL(unregister_mtd_user); EXPORT_SYMBOL(default_mtd_writev); EXPORT_SYMBOL(default_mtd_readv); -/*====================================================================*/ -/* Power management code */ - -#ifdef CONFIG_PM - -#include - -static struct pm_dev *mtd_pm_dev = NULL; - -static int mtd_pm_callback(struct pm_dev *dev, pm_request_t rqst, void *data) -{ - int ret = 0, i; - - if (down_trylock(&mtd_table_mutex)) - return -EAGAIN; - if (rqst == PM_SUSPEND) { - for (i = 0; ret == 0 && i < MAX_MTD_DEVICES; i++) { - if (mtd_table[i] && mtd_table[i]->suspend) - ret = mtd_table[i]->suspend(mtd_table[i]); - } - } else i = MAX_MTD_DEVICES-1; - - if (rqst == PM_RESUME || ret) { - for ( ; i >= 0; i--) { - if (mtd_table[i] && mtd_table[i]->resume) - mtd_table[i]->resume(mtd_table[i]); - } - } - up(&mtd_table_mutex); - return ret; -} -#endif +#ifdef CONFIG_PROC_FS /*====================================================================*/ /* Support for /proc/mtd */ -#ifdef CONFIG_PROC_FS static struct proc_dir_entry *proc_mtd; static inline int mtd_proc_info (char *buf, int i) @@ -352,7 +318,7 @@ static int mtd_read_proc (char *page, char **start, off_t off, int count, int len, l, i; off_t begin = 0; - down(&mtd_table_mutex); + mutex_lock(&mtd_table_mutex); len = sprintf(page, "dev: size erasesize name\n"); for (i=0; i< MAX_MTD_DEVICES; i++) { @@ -370,49 +336,34 @@ static int mtd_read_proc (char *page, char **start, off_t off, int count, *eof = 1; done: - up(&mtd_table_mutex); + mutex_unlock(&mtd_table_mutex); if (off >= len+begin) return 0; *start = page + (off-begin); return ((count < begin+len-off) ? count : begin+len-off); } -#endif /* CONFIG_PROC_FS */ - /*====================================================================*/ /* Init code */ static int __init init_mtd(void) { -#ifdef CONFIG_PROC_FS if ((proc_mtd = create_proc_entry( "mtd", 0, NULL ))) proc_mtd->read_proc = mtd_read_proc; -#endif - -#ifdef CONFIG_PM - mtd_pm_dev = pm_register(PM_UNKNOWN_DEV, 0, mtd_pm_callback); -#endif return 0; } static void __exit cleanup_mtd(void) { -#ifdef CONFIG_PM - if (mtd_pm_dev) { - pm_unregister(mtd_pm_dev); - mtd_pm_dev = NULL; - } -#endif - -#ifdef CONFIG_PROC_FS if (proc_mtd) remove_proc_entry( "mtd", NULL); -#endif } module_init(init_mtd); module_exit(cleanup_mtd); +#endif /* CONFIG_PROC_FS */ + MODULE_LICENSE("GPL"); MODULE_AUTHOR("David Woodhouse ");