Merge branches 'doc', 'multitouch', 'upstream' and 'upstream-fixes' into for-linus
[linux-2.6.git] / drivers / hid / usbhid / hiddev.c
index 891ff53..ff3c644 100644 (file)
@@ -242,6 +242,7 @@ static int hiddev_release(struct inode * inode, struct file * file)
        list_del(&list->node);
        spin_unlock_irqrestore(&list->hiddev->list_lock, flags);
 
+       mutex_lock(&list->hiddev->existancelock);
        if (!--list->hiddev->open) {
                if (list->hiddev->exist) {
                        usbhid_close(list->hiddev->hid);
@@ -252,6 +253,7 @@ static int hiddev_release(struct inode * inode, struct file * file)
        }
 
        kfree(list);
+       mutex_unlock(&list->hiddev->existancelock);
 
        return 0;
 }
@@ -300,17 +302,21 @@ static int hiddev_open(struct inode *inode, struct file *file)
        list_add_tail(&list->node, &hiddev->list);
        spin_unlock_irq(&list->hiddev->list_lock);
 
+       mutex_lock(&hiddev->existancelock);
        if (!list->hiddev->open++)
                if (list->hiddev->exist) {
                        struct hid_device *hid = hiddev->hid;
                        res = usbhid_get_power(hid);
                        if (res < 0) {
                                res = -EIO;
-                               goto bail;
+                               goto bail_unlock;
                        }
                        usbhid_open(hid);
                }
+       mutex_unlock(&hiddev->existancelock);
        return 0;
+bail_unlock:
+       mutex_unlock(&hiddev->existancelock);
 bail:
        file->private_data = NULL;
        kfree(list);
@@ -511,7 +517,7 @@ static noinline int hiddev_ioctl_usage(struct hiddev *hiddev, unsigned int cmd,
                                 (uref_multi->num_values > HID_MAX_MULTI_USAGES ||
                                  uref->usage_index + uref_multi->num_values > field->report_count))
                                goto inval;
-                       }
+               }
 
                switch (cmd) {
                case HIDIOCGUSAGE:
@@ -803,14 +809,7 @@ static long hiddev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
                        break;
 
                if (_IOC_NR(cmd) == _IOC_NR(HIDIOCGNAME(0))) {
-                       int len;
-
-                       if (!hid->name) {
-                               r = 0;
-                               break;
-                       }
-
-                       len = strlen(hid->name) + 1;
+                       int len = strlen(hid->name) + 1;
                        if (len > _IOC_SIZE(cmd))
                                 len = _IOC_SIZE(cmd);
                        r = copy_to_user(user_arg, hid->name, len) ?
@@ -819,14 +818,7 @@ static long hiddev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
                }
 
                if (_IOC_NR(cmd) == _IOC_NR(HIDIOCGPHYS(0))) {
-                       int len;
-
-                       if (!hid->phys) {
-                               r = 0;
-                               break;
-                       }
-
-                       len = strlen(hid->phys) + 1;
+                       int len = strlen(hid->phys) + 1;
                        if (len > _IOC_SIZE(cmd))
                                len = _IOC_SIZE(cmd);
                        r = copy_to_user(user_arg, hid->phys, len) ?
@@ -927,7 +919,6 @@ void hiddev_disconnect(struct hid_device *hid)
 
        mutex_lock(&hiddev->existancelock);
        hiddev->exist = 0;
-       mutex_unlock(&hiddev->existancelock);
 
        usb_deregister_dev(usbhid->intf, &hiddev_class);
 
@@ -937,4 +928,5 @@ void hiddev_disconnect(struct hid_device *hid)
        } else {
                kfree(hiddev);
        }
+       mutex_unlock(&hiddev->existancelock);
 }