diff options
| -rw-r--r-- | drivers/w1/ds_w1_bridge.c | 4 | ||||
| -rw-r--r-- | drivers/w1/w1.c | 68 | ||||
| -rw-r--r-- | drivers/w1/w1.h | 6 | ||||
| -rw-r--r-- | drivers/w1/w1_family.c | 3 | ||||
| -rw-r--r-- | drivers/w1/w1_int.c | 11 |
5 files changed, 67 insertions, 25 deletions
diff --git a/drivers/w1/ds_w1_bridge.c b/drivers/w1/ds_w1_bridge.c index 0baaeb5fd630..7bddd8ac7d7f 100644 --- a/drivers/w1/ds_w1_bridge.c +++ b/drivers/w1/ds_w1_bridge.c @@ -83,11 +83,11 @@ static u8 ds9490r_read_byte(unsigned long data) return byte; } -static void ds9490r_write_block(unsigned long data, u8 *buf, int len) +static void ds9490r_write_block(unsigned long data, const u8 *buf, int len) { struct ds_device *dev = (struct ds_device *)data; - ds_write_block(dev, buf, len); + ds_write_block(dev, (u8 *)buf, len); } static u8 ds9490r_read_block(unsigned long data, u8 *buf, int len) diff --git a/drivers/w1/w1.c b/drivers/w1/w1.c index 0e6ccd46af0e..b460927ec32a 100644 --- a/drivers/w1/w1.c +++ b/drivers/w1/w1.c @@ -469,6 +469,8 @@ static void w1_slave_detach(struct w1_slave *sl) device_unregister(&sl->dev); w1_family_put(sl->family); + sl->master->slave_count--; + memcpy(&msg.id.id, &sl->reg_num, sizeof(msg.id.id)); msg.type = W1_SLAVE_REMOVE; w1_netlink_send(sl->master, &msg); @@ -492,6 +494,20 @@ static struct w1_master *w1_search_master(unsigned long data) return (found)?dev:NULL; } +void w1_reconnect_slaves(struct w1_family *f) +{ + struct w1_master *dev; + + spin_lock_bh(&w1_mlock); + list_for_each_entry(dev, &w1_masters, w1_master_entry) { + dev_info(&dev->dev, "Reconnecting slaves in %s into new family %02x.\n", + dev->name, f->fid); + set_bit(W1_MASTER_NEED_RECONNECT, &dev->flags); + } + spin_unlock_bh(&w1_mlock); +} + + static void w1_slave_found(unsigned long data, u64 rn) { int slave_count; @@ -637,7 +653,7 @@ static int w1_control(void *data) flush_signals(current); list_for_each_entry_safe(dev, n, &w1_masters, w1_master_entry) { - if (!control_needs_exit && !dev->need_exit) + if (!control_needs_exit && !dev->flags) continue; /* * Little race: we can create thread but not set the flag. @@ -648,12 +664,8 @@ static int w1_control(void *data) continue; } - spin_lock_bh(&w1_mlock); - list_del(&dev->w1_master_entry); - spin_unlock_bh(&w1_mlock); - if (control_needs_exit) { - dev->need_exit = 1; + set_bit(W1_MASTER_NEED_EXIT, &dev->flags); err = kill_proc(dev->kpid, SIGTERM, 1); if (err) @@ -662,16 +674,42 @@ static int w1_control(void *data) dev->kpid); } - wait_for_completion(&dev->dev_exited); + if (test_bit(W1_MASTER_NEED_EXIT, &dev->flags)) { + wait_for_completion(&dev->dev_exited); + spin_lock_bh(&w1_mlock); + list_del(&dev->w1_master_entry); + spin_unlock_bh(&w1_mlock); + + list_for_each_entry_safe(sl, sln, &dev->slist, w1_slave_entry) { + list_del(&sl->w1_slave_entry); + + w1_slave_detach(sl); + kfree(sl); + } + w1_destroy_master_attributes(dev); + atomic_dec(&dev->refcnt); + continue; + } + + if (test_bit(W1_MASTER_NEED_RECONNECT, &dev->flags)) { + dev_info(&dev->dev, "Reconnecting slaves in device %s.\n", dev->name); + down(&dev->mutex); + list_for_each_entry(sl, &dev->slist, w1_slave_entry) { + if (sl->family->fid == W1_FAMILY_DEFAULT) { + struct w1_reg_num rn; + list_del(&sl->w1_slave_entry); + w1_slave_detach(sl); + + memcpy(&rn, &sl->reg_num, sizeof(rn)); - list_for_each_entry_safe(sl, sln, &dev->slist, w1_slave_entry) { - list_del(&sl->w1_slave_entry); + kfree(sl); - w1_slave_detach(sl); - kfree(sl); + w1_attach_slave_device(dev, &rn); + } + } + clear_bit(W1_MASTER_NEED_RECONNECT, &dev->flags); + up(&dev->mutex); } - w1_destroy_master_attributes(dev); - atomic_dec(&dev->refcnt); } } @@ -686,14 +724,14 @@ int w1_process(void *data) daemonize("%s", dev->name); allow_signal(SIGTERM); - while (!dev->need_exit) { + while (!test_bit(W1_MASTER_NEED_EXIT, &dev->flags)) { try_to_freeze(PF_FREEZE); msleep_interruptible(w1_timeout * 1000); if (signal_pending(current)) flush_signals(current); - if (dev->need_exit) + if (test_bit(W1_MASTER_NEED_EXIT, &dev->flags)) break; if (!dev->initialized) diff --git a/drivers/w1/w1.h b/drivers/w1/w1.h index 6b5f7be50b8a..4f0a986e33e3 100644 --- a/drivers/w1/w1.h +++ b/drivers/w1/w1.h @@ -151,6 +151,9 @@ struct w1_bus_master void (*search)(unsigned long, w1_slave_found_callback); }; +#define W1_MASTER_NEED_EXIT 0 +#define W1_MASTER_NEED_RECONNECT 1 + struct w1_master { struct list_head w1_master_entry; @@ -169,7 +172,8 @@ struct w1_master void *priv; int priv_size; - int need_exit; + long flags; + pid_t kpid; struct semaphore mutex; diff --git a/drivers/w1/w1_family.c b/drivers/w1/w1_family.c index b8502d910c50..73e73f6be48a 100644 --- a/drivers/w1/w1_family.c +++ b/drivers/w1/w1_family.c @@ -60,9 +60,10 @@ int w1_register_family(struct w1_family *newf) newf->need_exit = 0; list_add_tail(&newf->family_entry, &w1_families); } - spin_unlock(&w1_flock); + w1_reconnect_slaves(newf); + return ret; } diff --git a/drivers/w1/w1_int.c b/drivers/w1/w1_int.c index cf18f1324f03..35e85d961702 100644 --- a/drivers/w1/w1_int.c +++ b/drivers/w1/w1_int.c @@ -124,10 +124,9 @@ int w1_add_master_device(struct w1_bus_master *master) /* validate minimum functionality */ if (!(master->touch_bit && master->reset_bus) && - !(master->write_bit && master->read_bit)) - { - printk(KERN_ERR "w1_add_master_device: invalid function set\n"); - return(-EINVAL); + !(master->write_bit && master->read_bit)) { + printk(KERN_ERR "w1_add_master_device: invalid function set\n"); + return(-EINVAL); } dev = w1_alloc_dev(w1_ids++, w1_max_slave_count, w1_max_slave_ttl, &w1_driver, &w1_device); @@ -163,7 +162,7 @@ int w1_add_master_device(struct w1_bus_master *master) return 0; err_out_kill_thread: - dev->need_exit = 1; + set_bit(W1_MASTER_NEED_EXIT, &dev->flags); if (kill_proc(dev->kpid, SIGTERM, 1)) dev_err(&dev->dev, "Failed to send signal to w1 kernel thread %d.\n", @@ -181,7 +180,7 @@ void __w1_remove_master_device(struct w1_master *dev) int err; struct w1_netlink_msg msg; - dev->need_exit = 1; + set_bit(W1_MASTER_NEED_EXIT, &dev->flags); err = kill_proc(dev->kpid, SIGTERM, 1); if (err) dev_err(&dev->dev, |