V4L/DVB (11174): pvrusb2: Implement reporting of connected sub-devices

The pvrusb2 driver has a function that reports internal state.  It can
be accessed from either the debug interface or as the result of a v4l
log status request.  This change adds information listing sub-devices
to the report.

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

diff --git a/drivers/media/video/pvrusb2/pvrusb2-hdw.c b/drivers/media/video/pvrusb2/pvrusb2-hdw.c
index 2f9667e..bd4e374 100644 (file)
--- a/drivers/media/video/pvrusb2/pvrusb2-hdw.c
+++ b/drivers/media/video/pvrusb2/pvrusb2-hdw.c
@@ -4779,6 +4779,29 @@ static unsigned int pvr2_hdw_report_unlocked(struct pvr2_hdw *hdw,int which,
                        stats.buffers_processed,
                        stats.buffers_failed);
        }
+       case 6: {
+               struct v4l2_subdev *sd;
+               unsigned int tcnt = 0;
+               unsigned int ccnt;
+               const char *p;
+               unsigned int id;
+               ccnt = scnprintf(buf,
+                                acnt,
+                                "Associted v4l2_subdev drivers:");
+               tcnt += ccnt;
+               v4l2_device_for_each_subdev(sd, &hdw->v4l2_dev) {
+                       id = sd->grp_id;
+                       p = NULL;
+                       if (id < ARRAY_SIZE(module_names)) {
+                               p = module_names[id];
+                       }
+                       if (!p) p = "(unknown)";
+                       ccnt = scnprintf(buf + tcnt,
+                                        acnt - tcnt,
+                                        " %s (%u)", p, id);
+               }
+               return tcnt;
+       }
        default: break;
        }
        return 0;