V4L/DVB (8718): gspca: suspend/resume added.

Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 29 insertions, 1 deletions

diff --git a/drivers/media/video/gspca/gspca.c b/drivers/media/video/gspca/gspca.c
index 15d302b28b79..2f7bf263255c 100644
--- a/drivers/media/video/gspca/gspca.c
+++ b/drivers/media/video/gspca/gspca.c
@@ -114,7 +114,8 @@ static void fill_frame(struct gspca_dev *gspca_dev,
         cam_pkt_op pkt_scan;
 
         if (urb->status != 0) {
-                PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status);
+                if (!gspca_dev->frozen)
+                        PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status);
                 return;         /* disconnection ? */
         }
         pkt_scan = gspca_dev->sd_desc->pkt_scan;
@@ -1808,6 +1809,33 @@ void gspca_disconnect(struct usb_interface *intf)
 }
 EXPORT_SYMBOL(gspca_disconnect);
 
+#ifdef CONFIG_PM
+int gspca_suspend(struct usb_interface *intf, pm_message_t message)
+{
+        struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
+
+        if (!gspca_dev->streaming)
+                return 0;
+        gspca_dev->frozen = 1;          /* avoid urb error messages */
+        gspca_dev->sd_desc->stopN(gspca_dev);
+        destroy_urbs(gspca_dev);
+        gspca_set_alt0(gspca_dev);
+        gspca_dev->sd_desc->stop0(gspca_dev);
+        return 0;
+}
+EXPORT_SYMBOL(gspca_suspend);
+
+int gspca_resume(struct usb_interface *intf)
+{
+        struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
+
+        gspca_dev->frozen = 0;
+        if (!gspca_dev->streaming)
+                return 0;
+        return gspca_init_transfer(gspca_dev);
+}
+EXPORT_SYMBOL(gspca_resume);
+#endif
 /* -- cam driver utility functions -- */
 
 /* auto gain and exposure algorithm based on the knee algorithm described here: