[PATCH] w1: Detouching bug fixed.
Signed-off-by: Evgeniy Polyakov <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
commit 3aca692d3ec7cf89da4575f598e41f74502b22d7
tree 84740dbcf1ea648b303020f2106e7f9e46f92835
parent d2a4ef6a0ce4d841293b49bf2cdc17a0ebfaaf9d
author Evgeniy Polyakov <[email protected]> Thu, 11 Aug 2005 17:27:50 +0400
committer Greg Kroah-Hartman <[email protected]> Thu, 08 Sep 2005 14:41:26 -0700
drivers/w1/w1.c | 93 +++++++++++++++++++++++++++------------------------
drivers/w1/w1.h | 3 +-
drivers/w1/w1_int.c | 6 +--
3 files changed, 51 insertions(+), 51 deletions(-)
diff --git a/drivers/w1/w1.c b/drivers/w1/w1.c
--- a/drivers/w1/w1.c
+++ b/drivers/w1/w1.c
@@ -45,10 +45,12 @@ MODULE_AUTHOR("Evgeniy Polyakov <johnpol
MODULE_DESCRIPTION("Driver for 1-wire Dallas network protocol.");
static int w1_timeout = 10;
+static int w1_control_timeout = 1;
int w1_max_slave_count = 10;
int w1_max_slave_ttl = 10;
module_param_named(timeout, w1_timeout, int, 0);
+module_param_named(control_timeout, w1_control_timeout, int, 0);
module_param_named(max_slave_count, w1_max_slave_count, int, 0);
module_param_named(slave_ttl, w1_max_slave_ttl, int, 0);
@@ -69,37 +71,51 @@ static int w1_master_probe(struct device
return -ENODEV;
}
-static int w1_master_remove(struct device *dev)
-{
- return 0;
-}
-
static void w1_master_release(struct device *dev)
{
struct w1_master *md = dev_to_w1_master(dev);
- complete(&md->dev_released);
+
+ dev_dbg(dev, "%s: Releasing %s.\n", __func__, md->name);
+
+ if (md->nls && md->nls->sk_socket)
+ sock_release(md->nls->sk_socket);
+ memset(md, 0, sizeof(struct w1_master) + sizeof(struct w1_bus_master));
+ kfree(md);
}
static void w1_slave_release(struct device *dev)
{
struct w1_slave *sl = dev_to_w1_slave(dev);
- complete(&sl->dev_released);
+
+ dev_dbg(dev, "%s: Releasing %s.\n", __func__, sl->name);
+
+ while (atomic_read(&sl->refcnt)) {
+ dev_dbg(dev, "Waiting for %s to become free: refcnt=%d.\n",
+ sl->name, atomic_read(&sl->refcnt));
+ if (msleep_interruptible(1000))
+ flush_signals(current);
+ }
+
+ w1_family_put(sl->family);
+ sl->master->slave_count--;
+
+ complete(&sl->released);
}
static ssize_t w1_slave_read_name(struct device *dev, struct device_attribute *attr, char *buf)
{
- struct w1_slave *sl = dev_to_w1_slave(dev);
+ struct w1_slave *sl = dev_to_w1_slave(dev);
- return sprintf(buf, "%s\n", sl->name);
+ return sprintf(buf, "%s\n", sl->name);
}
static ssize_t w1_slave_read_id(struct kobject *kobj, char *buf, loff_t off, size_t count)
{
- struct w1_slave *sl = kobj_to_w1_slave(kobj);
+ struct w1_slave *sl = kobj_to_w1_slave(kobj);
- atomic_inc(&sl->refcnt);
- if (off > 8) {
- count = 0;
+ atomic_inc(&sl->refcnt);
+ if (off > 8) {
+ count = 0;
} else {
if (off + count > 8)
count = 8 - off;
@@ -109,7 +125,7 @@ static ssize_t w1_slave_read_id(struct k
atomic_dec(&sl->refcnt);
return count;
- }
+}
static struct device_attribute w1_slave_attr_name =
__ATTR(name, S_IRUGO, w1_slave_read_name, NULL);
@@ -139,7 +155,6 @@ struct device_driver w1_master_driver =
.name = "w1_master_driver",
.bus = &w1_bus_type,
.probe = w1_master_probe,
- .remove = w1_master_remove,
};
struct device w1_master_device = {
@@ -160,6 +175,7 @@ struct device w1_slave_device = {
.bus = &w1_bus_type,
.bus_id = "w1 bus slave",
.driver = &w1_slave_driver,
+ .release = &w1_slave_release
};
static ssize_t w1_master_attribute_show_name(struct device *dev, struct device_attribute *attr, char *buf)
@@ -406,8 +422,7 @@ static int __w1_attach_slave_device(stru
(unsigned int) sl->reg_num.family,
(unsigned long long) sl->reg_num.id);
- dev_dbg(&sl->dev, "%s: registering %s.\n", __func__,
- &sl->dev.bus_id[0]);
+ dev_dbg(&sl->dev, "%s: registering %s as %p.\n", __func__, &sl->dev.bus_id[0]);
err = device_register(&sl->dev);
if (err < 0) {
@@ -480,7 +495,7 @@ static int w1_attach_slave_device(struct
memcpy(&sl->reg_num, rn, sizeof(sl->reg_num));
atomic_set(&sl->refcnt, 0);
- init_completion(&sl->dev_released);
+ init_completion(&sl->released);
spin_lock(&w1_flock);
f = w1_family_registered(rn->family);
@@ -512,6 +527,8 @@ static int w1_attach_slave_device(struct
msg.type = W1_SLAVE_ADD;
w1_netlink_send(dev, &msg);
+ dev_info(&dev->dev, "Finished %s for sl=%p.\n", __func__, sl);
+
return 0;
}
@@ -519,29 +536,23 @@ static void w1_slave_detach(struct w1_sl
{
struct w1_netlink_msg msg;
- dev_info(&sl->dev, "%s: detaching %s.\n", __func__, sl->name);
+ dev_info(&sl->dev, "%s: detaching %s [%p].\n", __func__, sl->name, sl);
- while (atomic_read(&sl->refcnt)) {
- printk(KERN_INFO "Waiting for %s to become free: refcnt=%d.\n",
- sl->name, atomic_read(&sl->refcnt));
-
- if (msleep_interruptible(1000))
- flush_signals(current);
- }
+ list_del(&sl->w1_slave_entry);
if (sl->family->fops && sl->family->fops->remove_slave)
sl->family->fops->remove_slave(sl);
+ memcpy(&msg.id.id, &sl->reg_num, sizeof(msg.id.id));
+ msg.type = W1_SLAVE_REMOVE;
+ w1_netlink_send(sl->master, &msg);
+
sysfs_remove_bin_file(&sl->dev.kobj, &w1_slave_attr_bin_id);
device_remove_file(&sl->dev, &w1_slave_attr_name);
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);
+ wait_for_completion(&sl->released);
+ kfree(sl);
}
static struct w1_master *w1_search_master(unsigned long data)
@@ -713,7 +724,7 @@ static int w1_control(void *data)
have_to_wait = 0;
try_to_freeze();
- msleep_interruptible(w1_timeout * 1000);
+ msleep_interruptible(w1_control_timeout * 1000);
if (signal_pending(current))
flush_signals(current);
@@ -746,13 +757,12 @@ static int w1_control(void *data)
list_del(&dev->w1_master_entry);
spin_unlock_bh(&w1_mlock);
+ down(&dev->mutex);
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);
+ up(&dev->mutex);
atomic_dec(&dev->refcnt);
continue;
}
@@ -760,19 +770,17 @@ static int w1_control(void *data)
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) {
+ list_for_each_entry_safe(sl, sln, &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));
-
- kfree(sl);
+ w1_slave_detach(sl);
w1_attach_slave_device(dev, &rn);
}
}
+ dev_info(&dev->dev, "Reconnecting slaves in device %s has been finished.\n", dev->name);
clear_bit(W1_MASTER_NEED_RECONNECT, &dev->flags);
up(&dev->mutex);
}
@@ -816,10 +824,7 @@ int w1_process(void *data)
list_for_each_entry_safe(sl, sln, &dev->slist, w1_slave_entry) {
if (!test_bit(W1_SLAVE_ACTIVE, (unsigned long *)&sl->flags) && !--sl->ttl) {
- list_del (&sl->w1_slave_entry);
-
w1_slave_detach(sl);
- kfree(sl);
dev->slave_count--;
} else if (test_bit(W1_SLAVE_ACTIVE, (unsigned long *)&sl->flags))
diff --git a/drivers/w1/w1.h b/drivers/w1/w1.h
--- a/drivers/w1/w1.h
+++ b/drivers/w1/w1.h
@@ -76,7 +76,7 @@ struct w1_slave
struct w1_master *master;
struct w1_family *family;
struct device dev;
- struct completion dev_released;
+ struct completion released;
};
typedef void (* w1_slave_found_callback)(unsigned long, u64);
@@ -176,7 +176,6 @@ struct w1_master
struct device_driver *driver;
struct device dev;
- struct completion dev_released;
struct completion dev_exited;
struct w1_bus_master *bus_master;
diff --git a/drivers/w1/w1_int.c b/drivers/w1/w1_int.c
--- a/drivers/w1/w1_int.c
+++ b/drivers/w1/w1_int.c
@@ -76,7 +76,6 @@ static struct w1_master * w1_alloc_dev(u
INIT_LIST_HEAD(&dev->slist);
init_MUTEX(&dev->mutex);
- init_completion(&dev->dev_released);
init_completion(&dev->dev_exited);
memcpy(&dev->dev, device, sizeof(struct device));
@@ -107,9 +106,6 @@ static struct w1_master * w1_alloc_dev(u
void w1_free_dev(struct w1_master *dev)
{
device_unregister(&dev->dev);
- dev_fini_netlink(dev);
- memset(dev, 0, sizeof(struct w1_master) + sizeof(struct w1_bus_master));
- kfree(dev);
}
int w1_add_master_device(struct w1_bus_master *master)
@@ -184,7 +180,7 @@ void __w1_remove_master_device(struct w1
__func__, dev->kpid);
while (atomic_read(&dev->refcnt)) {
- printk(KERN_INFO "Waiting for %s to become free: refcnt=%d.\n",
+ dev_dbg(&dev->dev, "Waiting for %s to become free: refcnt=%d.\n",
dev->name, atomic_read(&dev->refcnt));
if (msleep_interruptible(1000))
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
| |
 |