V4L/DVB (13222): pvrusb2: Make more info available to udev

pvrusb2: Associate V4L device node in sysfs with the underlying USB
device.  This opens the door to device information tracking in udev

Signed-off-by: Mike Isely <isely@pobox.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 14 insertions, 1 deletions

diff --git a/drivers/media/video/pvrusb2/pvrusb2-v4l2.c b/drivers/media/video/pvrusb2/pvrusb2-v4l2.c
index 2d8825e5b1be..6aa48e0ae731 100644
--- a/drivers/media/video/pvrusb2/pvrusb2-v4l2.c
+++ b/drivers/media/video/pvrusb2/pvrusb2-v4l2.c
@@ -913,6 +913,15 @@ static void pvr2_v4l2_dev_destroy(struct pvr2_v4l2_dev *dip)
 }
 
 
+static void pvr2_v4l2_dev_disassociate_parent(struct pvr2_v4l2_dev *dip)
+{
+        if (!dip) return;
+        if (!dip->devbase.parent) return;
+        dip->devbase.parent = NULL;
+        device_move(&dip->devbase.dev, NULL, DPM_ORDER_NONE);
+}
+
+
 static void pvr2_v4l2_destroy_no_lock(struct pvr2_v4l2 *vp)
 {
         if (vp->dev_video) {
@@ -943,6 +952,8 @@ static void pvr2_v4l2_internal_check(struct pvr2_channel *chp)
         struct pvr2_v4l2 *vp;
         vp = container_of(chp,struct pvr2_v4l2,channel);
         if (!vp->channel.mc_head->disconnect_flag) return;
+        pvr2_v4l2_dev_disassociate_parent(vp->dev_video);
+        pvr2_v4l2_dev_disassociate_parent(vp->dev_radio);
         if (vp->vfirst) return;
         pvr2_v4l2_destroy_no_lock(vp);
 }
@@ -1250,12 +1261,13 @@ static void pvr2_v4l2_dev_init(struct pvr2_v4l2_dev *dip,
                                struct pvr2_v4l2 *vp,
                                int v4l_type)
 {
+        struct usb_device *usbdev;
         int mindevnum;
         int unit_number;
         int *nr_ptr = NULL;
         dip->v4lp = vp;
 
-
+        usbdev = pvr2_hdw_get_dev(vp->channel.mc_head->hdw);
         dip->v4l_type = v4l_type;
         switch (v4l_type) {
         case VFL_TYPE_GRABBER:
@@ -1296,6 +1308,7 @@ static void pvr2_v4l2_dev_init(struct pvr2_v4l2_dev *dip,
         if (nr_ptr && (unit_number >= 0) && (unit_number < PVR_NUM)) {
                 mindevnum = nr_ptr[unit_number];
         }
+        dip->devbase.parent = &usbdev->dev;
         if ((video_register_device(&dip->devbase,
                                    dip->v4l_type, mindevnum) < 0) &&
             (video_register_device(&dip->devbase,