diff mbox

wacom + runtime PM = AA deadlock

Message ID 20100913171046.GA23116@core.coreip.homeip.net (mailing list archive)
State New, archived
Headers show

Commit Message

Dmitry Torokhov Sept. 13, 2010, 5:10 p.m. UTC
None
diff mbox

Patch

diff --git a/drivers/input/tablet/wacom_sys.c b/drivers/input/tablet/wacom_sys.c
index 1e3af29..2806b2d 100644
--- a/drivers/input/tablet/wacom_sys.c
+++ b/drivers/input/tablet/wacom_sys.c
@@ -103,27 +103,26 @@  static void wacom_sys_irq(struct urb *urb)
 static int wacom_open(struct input_dev *dev)
 {
 	struct wacom *wacom = input_get_drvdata(dev);
+	int retval;
 
-	mutex_lock(&wacom->lock);
-
-	wacom->irq->dev = wacom->usbdev;
-
-	if (usb_autopm_get_interface(wacom->intf) < 0) {
-		mutex_unlock(&wacom->lock);
+	if (usb_autopm_get_interface(wacom->intf) < 0)
 		return -EIO;
-	}
+
+	mutex_lock(&wacom->lock);
 
 	if (usb_submit_urb(wacom->irq, GFP_KERNEL)) {
-		usb_autopm_put_interface(wacom->intf);
-		mutex_unlock(&wacom->lock);
-		return -EIO;
+		retval = -EIO;
+		goto out;
 	}
 
 	wacom->open = true;
 	wacom->intf->needs_remote_wakeup = 1;
 
+out:
 	mutex_unlock(&wacom->lock);
-	return 0;
+	usb_autopm_put_interface(wacom->intf);
+
+	return retval;
 }
 
 static void wacom_close(struct input_dev *dev)