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[RFT,1/2] USB: acecad: Implement suspend/resume

Message ID 201003121139.39631.oliver@neukum.org
State New, archived
Headers show

Commit Message

Oliver Neukum March 12, 2010, 10:39 a.m. UTC
None
diff mbox

Patch

diff --git a/drivers/input/tablet/acecad.c b/drivers/input/tablet/acecad.c
index 670c61c..bf5bffb 100644
--- a/drivers/input/tablet/acecad.c
+++ b/drivers/input/tablet/acecad.c
@@ -56,6 +56,7 @@  struct usb_acecad {
 
 	unsigned char *data;
 	dma_addr_t data_dma;
+	bool submitted;
 };
 
 static void usb_acecad_irq(struct urb *urb)
@@ -116,6 +117,7 @@  static int usb_acecad_open(struct input_dev *dev)
 	acecad->irq->dev = acecad->usbdev;
 	if (usb_submit_urb(acecad->irq, GFP_KERNEL))
 		return -EIO;
+	acecad->submitted = true;
 
 	return 0;
 }
@@ -124,6 +126,7 @@  static void usb_acecad_close(struct input_dev *dev)
 {
 	struct usb_acecad *acecad = input_get_drvdata(dev);
 
+	acecad->submitted = false;
 	usb_kill_urb(acecad->irq);
 }
 
@@ -261,6 +264,25 @@  static void usb_acecad_disconnect(struct usb_interface *intf)
 	}
 }
 
+static int usb_acecad_suspend(struct usb_interface *intf, pm_message_t message)
+{
+	struct usb_acecad *acecad = usb_get_intfdata(intf);
+	
+	usb_kill_urb(acecad->irq);
+	return 0;
+}
+
+static int usb_acecad_resume(struct usb_interface *intf)
+{
+	struct usb_acecad *acecad = usb_get_intfdata(intf);
+	int rv = 0;
+
+	if (acecad->submitted)
+		rv = usb_submit_urb(acecad->irq, GFP_NOIO);
+	
+	return rv;
+}
+
 static struct usb_device_id usb_acecad_id_table [] = {
 	{ USB_DEVICE(USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_FLAIR), .driver_info = 0 },
 	{ USB_DEVICE(USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_302),	 .driver_info = 1 },
@@ -273,6 +295,8 @@  static struct usb_driver usb_acecad_driver = {
 	.name =		"usb_acecad",
 	.probe =	usb_acecad_probe,
 	.disconnect =	usb_acecad_disconnect,
+	.suspend =	usb_acecad_suspend,
+	.resume =	usb_acecad_resume,
 	.id_table =	usb_acecad_id_table,
 };