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-rw-r--r--drivers/w1/ds_w1_bridge.c4
-rw-r--r--drivers/w1/w1.c68
-rw-r--r--drivers/w1/w1.h6
-rw-r--r--drivers/w1/w1_family.c3
-rw-r--r--drivers/w1/w1_int.c11
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,
generated by cgit v1.2.3 (git 2.0.4) at 2024-05-13 16:49:27 +0000