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path: root/drivers/usb/mon/mon_main.c
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Diffstat (limited to 'drivers/usb/mon/mon_main.c')
-rw-r--r--drivers/usb/mon/mon_main.c22
1 files changed, 11 insertions, 11 deletions
diff --git a/drivers/usb/mon/mon_main.c b/drivers/usb/mon/mon_main.c
index c34944c7504..6ecc2730221 100644
--- a/drivers/usb/mon/mon_main.c
+++ b/drivers/usb/mon/mon_main.c
@@ -12,6 +12,7 @@
#include <linux/debugfs.h>
#include <linux/smp_lock.h>
#include <linux/notifier.h>
+#include <linux/mutex.h>
#include "usb_mon.h"
#include "../core/hcd.h"
@@ -23,7 +24,7 @@ static void mon_dissolve(struct mon_bus *mbus, struct usb_bus *ubus);
static void mon_bus_drop(struct kref *r);
static void mon_bus_init(struct dentry *mondir, struct usb_bus *ubus);
-DECLARE_MUTEX(mon_lock);
+DEFINE_MUTEX(mon_lock);
static struct dentry *mon_dir; /* /dbg/usbmon */
static LIST_HEAD(mon_buses); /* All buses we know: struct mon_bus */
@@ -196,14 +197,14 @@ static void mon_bus_remove(struct usb_bus *ubus)
{
struct mon_bus *mbus = ubus->mon_bus;
- down(&mon_lock);
+ mutex_lock(&mon_lock);
list_del(&mbus->bus_link);
debugfs_remove(mbus->dent_t);
debugfs_remove(mbus->dent_s);
mon_dissolve(mbus, ubus);
kref_put(&mbus->ref, mon_bus_drop);
- up(&mon_lock);
+ mutex_unlock(&mon_lock);
}
static int mon_notify(struct notifier_block *self, unsigned long action,
@@ -276,9 +277,8 @@ static void mon_bus_init(struct dentry *mondir, struct usb_bus *ubus)
char name[NAMESZ];
int rc;
- if ((mbus = kmalloc(sizeof(struct mon_bus), GFP_KERNEL)) == NULL)
+ if ((mbus = kzalloc(sizeof(struct mon_bus), GFP_KERNEL)) == NULL)
goto err_alloc;
- memset(mbus, 0, sizeof(struct mon_bus));
kref_init(&mbus->ref);
spin_lock_init(&mbus->lock);
INIT_LIST_HEAD(&mbus->r_list);
@@ -307,9 +307,9 @@ static void mon_bus_init(struct dentry *mondir, struct usb_bus *ubus)
goto err_create_s;
mbus->dent_s = d;
- down(&mon_lock);
+ mutex_lock(&mon_lock);
list_add_tail(&mbus->bus_link, &mon_buses);
- up(&mon_lock);
+ mutex_unlock(&mon_lock);
return;
err_create_s:
@@ -347,11 +347,11 @@ static int __init mon_init(void)
usb_register_notify(&mon_nb);
- down(&usb_bus_list_lock);
+ mutex_lock(&usb_bus_list_lock);
list_for_each_entry (ubus, &usb_bus_list, bus_list) {
mon_bus_init(mondir, ubus);
}
- up(&usb_bus_list_lock);
+ mutex_unlock(&usb_bus_list_lock);
return 0;
}
@@ -363,7 +363,7 @@ static void __exit mon_exit(void)
usb_unregister_notify(&mon_nb);
usb_mon_deregister();
- down(&mon_lock);
+ mutex_lock(&mon_lock);
while (!list_empty(&mon_buses)) {
p = mon_buses.next;
mbus = list_entry(p, struct mon_bus, bus_link);
@@ -387,7 +387,7 @@ static void __exit mon_exit(void)
mon_dissolve(mbus, mbus->u_bus);
kref_put(&mbus->ref, mon_bus_drop);
}
- up(&mon_lock);
+ mutex_unlock(&mon_lock);
debugfs_remove(mon_dir);
}