HID: autosuspend support for USB HID

[linux-2.6-omap-h63xx.git] / drivers / hid / usbhid / hiddev.c

diff --git a/drivers/hid/usbhid/hiddev.c b/drivers/hid/usbhid/hiddev.c
index 4940e4d70c2d1ef6ef02804cc45222c7e5201c60..fd7375627e5d69f4fb36527fef0f5f9428e951f9 100644 (file)
--- a/drivers/hid/usbhid/hiddev.c
+++ b/drivers/hid/usbhid/hiddev.c
@@ -249,10 +249,12 @@ static int hiddev_release(struct inode * inode, struct file * file)
        spin_unlock_irqrestore(&list->hiddev->list_lock, flags);
 
        if (!--list->hiddev->open) {
-               if (list->hiddev->exist)
+               if (list->hiddev->exist) {
                        usbhid_close(list->hiddev->hid);
-               else
+                       usbhid_put_power(list->hiddev->hid);
+               } else {
                        kfree(list->hiddev);
+               }
        }
 
        kfree(list);
@@ -303,10 +305,21 @@ static int hiddev_open(struct inode *inode, struct file *file)
        list_add_tail(&list->node, &hiddev_table[i]->list);
        spin_unlock_irq(&list->hiddev->list_lock);
 
+       if (!list->hiddev->open++)
+               if (list->hiddev->exist) {
+                       struct hid_device *hid = hiddev_table[i]->hid;
+                       res = usbhid_get_power(hid);
+                       if (res < 0) {
+                               res = -EIO;
+                               goto bail;
+                       }
+                       usbhid_open(hid);
+               }
+
        return 0;
 bail:
        file->private_data = NULL;
-       kfree(list->hiddev);
+       kfree(list);
        return res;
 }
 
@@ -323,7 +336,7 @@ static ssize_t hiddev_write(struct file * file, const char __user * buffer, size
  */
 static ssize_t hiddev_read(struct file * file, char __user * buffer, size_t count, loff_t *ppos)
 {
-       DECLARE_WAITQUEUE(wait, current);
+       DEFINE_WAIT(wait);
        struct hiddev_list *list = file->private_data;
        int event_size;
        int retval;