diff options
| -rw-r--r-- | drivers/isdn/capi/kcapi.c | 49 | ||||
| -rw-r--r-- | drivers/isdn/capi/kcapi.h | 2 | ||||
| -rw-r--r-- | drivers/isdn/capi/kcapi_proc.c | 8 |
3 files changed, 27 insertions, 32 deletions
diff --git a/drivers/isdn/capi/kcapi.c b/drivers/isdn/capi/kcapi.c index f37c13b4ddc..c46964fc17c 100644 --- a/drivers/isdn/capi/kcapi.c +++ b/drivers/isdn/capi/kcapi.c @@ -61,7 +61,7 @@ static char capi_manufakturer[64] = "AVM Berlin"; #define NCCI2CTRL(ncci) (((ncci) >> 24) & 0x7f) LIST_HEAD(capi_drivers); -DEFINE_RWLOCK(capi_drivers_list_lock); +DEFINE_MUTEX(capi_drivers_lock); static DEFINE_RWLOCK(application_lock); static DEFINE_MUTEX(controller_mutex); @@ -540,11 +540,9 @@ EXPORT_SYMBOL(detach_capi_ctr); void register_capi_driver(struct capi_driver *driver) { - unsigned long flags; - - write_lock_irqsave(&capi_drivers_list_lock, flags); + mutex_lock(&capi_drivers_lock); list_add_tail(&driver->list, &capi_drivers); - write_unlock_irqrestore(&capi_drivers_list_lock, flags); + mutex_unlock(&capi_drivers_lock); } EXPORT_SYMBOL(register_capi_driver); @@ -558,11 +556,9 @@ EXPORT_SYMBOL(register_capi_driver); void unregister_capi_driver(struct capi_driver *driver) { - unsigned long flags; - - write_lock_irqsave(&capi_drivers_list_lock, flags); + mutex_lock(&capi_drivers_lock); list_del(&driver->list); - write_unlock_irqrestore(&capi_drivers_list_lock, flags); + mutex_unlock(&capi_drivers_lock); } EXPORT_SYMBOL(unregister_capi_driver); @@ -899,7 +895,6 @@ static int old_capi_manufacturer(unsigned int cmd, void __user *data) struct capi_driver *driver = NULL; capiloaddata ldata; struct list_head *l; - unsigned long flags; int retval; switch (cmd) { @@ -919,7 +914,8 @@ static int old_capi_manufacturer(unsigned int cmd, void __user *data) cparams.irq = cdef.irq; cparams.cardnr = cdef.cardnr; - read_lock_irqsave(&capi_drivers_list_lock, flags); + mutex_lock(&capi_drivers_lock); + switch (cdef.cardtype) { case AVM_CARDTYPE_B1: list_for_each(l, &capi_drivers) { @@ -940,18 +936,15 @@ static int old_capi_manufacturer(unsigned int cmd, void __user *data) break; } if (!driver) { - read_unlock_irqrestore(&capi_drivers_list_lock, flags); printk(KERN_ERR "kcapi: driver not loaded.\n"); - return -EIO; - } - if (!driver->add_card) { - read_unlock_irqrestore(&capi_drivers_list_lock, flags); + retval = -EIO; + } else if (!driver->add_card) { printk(KERN_ERR "kcapi: driver has no add card function.\n"); - return -EIO; - } + retval = -EIO; + } else + retval = driver->add_card(driver, &cparams); - retval = driver->add_card(driver, &cparams); - read_unlock_irqrestore(&capi_drivers_list_lock, flags); + mutex_unlock(&capi_drivers_lock); return retval; case AVMB1_LOAD: @@ -1107,6 +1100,8 @@ int capi20_manufacturer(unsigned int cmd, void __user *data) cparams.cardtype = 0; cdef.driver[sizeof(cdef.driver)-1] = 0; + mutex_lock(&capi_drivers_lock); + list_for_each(l, &capi_drivers) { driver = list_entry(l, struct capi_driver, list); if (strcmp(driver->name, cdef.driver) == 0) @@ -1115,15 +1110,15 @@ int capi20_manufacturer(unsigned int cmd, void __user *data) if (driver == NULL) { printk(KERN_ERR "kcapi: driver \"%s\" not loaded.\n", cdef.driver); - return -ESRCH; - } - - if (!driver->add_card) { + retval = -ESRCH; + } else if (!driver->add_card) { printk(KERN_ERR "kcapi: driver \"%s\" has no add card function.\n", cdef.driver); - return -EIO; - } + retval = -EIO; + } else + retval = driver->add_card(driver, &cparams); - return driver->add_card(driver, &cparams); + mutex_unlock(&capi_drivers_lock); + return retval; } default: diff --git a/drivers/isdn/capi/kcapi.h b/drivers/isdn/capi/kcapi.h index f62c53bd6a9..07c58500fe4 100644 --- a/drivers/isdn/capi/kcapi.h +++ b/drivers/isdn/capi/kcapi.h @@ -30,7 +30,7 @@ enum { }; extern struct list_head capi_drivers; -extern rwlock_t capi_drivers_list_lock; +extern struct mutex capi_drivers_lock; extern struct capi20_appl *capi_applications[CAPI_MAXAPPL]; extern struct capi_ctr *capi_controller[CAPI_MAXCONTR]; diff --git a/drivers/isdn/capi/kcapi_proc.c b/drivers/isdn/capi/kcapi_proc.c index 59fd16a4ad8..71b07610ff3 100644 --- a/drivers/isdn/capi/kcapi_proc.c +++ b/drivers/isdn/capi/kcapi_proc.c @@ -238,9 +238,9 @@ static const struct file_operations proc_applstats_ops = { // --------------------------------------------------------------------------- static void *capi_driver_start(struct seq_file *seq, loff_t *pos) - __acquires(&capi_drivers_list_lock) + __acquires(&capi_drivers_lock) { - read_lock(&capi_drivers_list_lock); + mutex_lock(&capi_drivers_lock); return seq_list_start(&capi_drivers, *pos); } @@ -250,9 +250,9 @@ static void *capi_driver_next(struct seq_file *seq, void *v, loff_t *pos) } static void capi_driver_stop(struct seq_file *seq, void *v) - __releases(&capi_drivers_list_lock) + __releases(&capi_drivers_lock) { - read_unlock(&capi_drivers_list_lock); + mutex_unlock(&capi_drivers_lock); } static int capi_driver_show(struct seq_file *seq, void *v) |