diff options
Diffstat (limited to 'drivers/w1/w1_int.c')
| -rw-r--r-- | drivers/w1/w1_int.c | 47 |
1 files changed, 31 insertions, 16 deletions
diff --git a/drivers/w1/w1_int.c b/drivers/w1/w1_int.c index b50be3f1073..728039d2efe 100644 --- a/drivers/w1/w1_int.c +++ b/drivers/w1/w1_int.c @@ -1,7 +1,7 @@ /* * w1_int.c * - * Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru> + * Copyright (c) 2004 Evgeniy Polyakov <zbr@ioremap.net> * * * This program is free software; you can redistribute it and/or modify @@ -24,6 +24,8 @@ #include <linux/delay.h> #include <linux/kthread.h> #include <linux/slab.h> +#include <linux/export.h> +#include <linux/moduleparam.h> #include "w1.h" #include "w1_log.h" @@ -73,11 +75,15 @@ static struct w1_master * w1_alloc_dev(u32 id, int slave_count, int slave_ttl, atomic_set(&dev->refcnt, 2); INIT_LIST_HEAD(&dev->slist); + INIT_LIST_HEAD(&dev->async_list); mutex_init(&dev->mutex); + mutex_init(&dev->bus_mutex); + mutex_init(&dev->list_mutex); memcpy(&dev->dev, device, sizeof(struct device)); dev_set_name(&dev->dev, "w1_bus_master%u", dev->id); snprintf(dev->name, sizeof(dev->name), "w1_bus_master%u", dev->id); + dev->dev.init_name = dev->name; dev->driver = driver; @@ -99,6 +105,10 @@ static void w1_free_dev(struct w1_master *dev) device_unregister(&dev->dev); } +/** + * w1_add_master_device() - registers a new master device + * @master: master bus device to register + */ int w1_add_master_device(struct w1_bus_master *master) { struct w1_master *dev, *entry; @@ -113,18 +123,6 @@ int w1_add_master_device(struct w1_bus_master *master) printk(KERN_ERR "w1_add_master_device: invalid function set\n"); return(-EINVAL); } - /* While it would be electrically possible to make a device that - * generated a strong pullup in bit bang mode, only hardare that - * controls 1-wire time frames are even expected to support a strong - * pullup. w1_io.c would need to support calling set_pullup before - * the last write_bit operation of a w1_write_8 which it currently - * doesn't. - */ - if (!master->write_byte && !master->touch_bit && master->set_pullup) { - printk(KERN_ERR "w1_add_master_device: set_pullup requires " - "write_byte or touch_bit, disabling\n"); - master->set_pullup = NULL; - } /* Lock until the device is added (or not) to w1_masters. */ mutex_lock(&w1_mlock); @@ -180,6 +178,7 @@ int w1_add_master_device(struct w1_bus_master *master) #if 0 /* Thread cleanup code, not required currently. */ err_out_kill_thread: + set_bit(W1_ABORT_SEARCH, &dev->flags); kthread_stop(dev->thread); #endif err_out_rm_attr: @@ -195,16 +194,22 @@ void __w1_remove_master_device(struct w1_master *dev) struct w1_netlink_msg msg; struct w1_slave *sl, *sln; - kthread_stop(dev->thread); - mutex_lock(&w1_mlock); list_del(&dev->w1_master_entry); mutex_unlock(&w1_mlock); + set_bit(W1_ABORT_SEARCH, &dev->flags); + kthread_stop(dev->thread); + mutex_lock(&dev->mutex); - list_for_each_entry_safe(sl, sln, &dev->slist, w1_slave_entry) + mutex_lock(&dev->list_mutex); + list_for_each_entry_safe(sl, sln, &dev->slist, w1_slave_entry) { + mutex_unlock(&dev->list_mutex); w1_slave_detach(sl); + mutex_lock(&dev->list_mutex); + } w1_destroy_master_attributes(dev); + mutex_unlock(&dev->list_mutex); mutex_unlock(&dev->mutex); atomic_dec(&dev->refcnt); @@ -214,7 +219,13 @@ void __w1_remove_master_device(struct w1_master *dev) if (msleep_interruptible(1000)) flush_signals(current); + mutex_lock(&dev->list_mutex); + w1_process_callbacks(dev); + mutex_unlock(&dev->list_mutex); } + mutex_lock(&dev->list_mutex); + w1_process_callbacks(dev); + mutex_unlock(&dev->list_mutex); memset(&msg, 0, sizeof(msg)); msg.id.mst.id = dev->id; @@ -224,6 +235,10 @@ void __w1_remove_master_device(struct w1_master *dev) w1_free_dev(dev); } +/** + * w1_remove_master_device() - unregister a master device + * @bm: master bus device to remove + */ void w1_remove_master_device(struct w1_bus_master *bm) { struct w1_master *dev, *found = NULL; |