V4L/DVB: pvrusb2: New feature to mark specific hardware support as experimental

This adds a flag in the device attribute structure which can be used
to mark support for a particular device as experimental.  Any devices
flagged in this way, when encountered at run-time, will generate a
warning message to the kernel log.

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

2 files changed, 18 insertions, 0 deletions

diff --git a/drivers/media/video/pvrusb2/pvrusb2-devattr.h b/drivers/media/video/pvrusb2/pvrusb2-devattr.h
index e5b9594eb5f..273c8d4b385 100644
--- a/drivers/media/video/pvrusb2/pvrusb2-devattr.h
+++ b/drivers/media/video/pvrusb2/pvrusb2-devattr.h
@@ -177,6 +177,11 @@ struct pvr2_device_desc {
         unsigned int flag_has_composite:1;     /* Has composite input */
         unsigned int flag_has_svideo:1;        /* Has s-video input */
         unsigned int flag_fx2_16kb:1;          /* 16KB FX2 firmware OK here */
+
+        /* If this driver is considered experimental, i.e. not all aspects
+           are working correctly and/or it is untested, mark that fact
+           with this flag. */
+        unsigned int flag_is_experimental:1;
 };
 
 extern struct usb_device_id pvr2_device_table[];
diff --git a/drivers/media/video/pvrusb2/pvrusb2-hdw.c b/drivers/media/video/pvrusb2/pvrusb2-hdw.c
index d13232d5182..2c3f845c3e5 100644
--- a/drivers/media/video/pvrusb2/pvrusb2-hdw.c
+++ b/drivers/media/video/pvrusb2/pvrusb2-hdw.c
@@ -2459,6 +2459,19 @@ struct pvr2_hdw *pvr2_hdw_create(struct usb_interface *intf,
                    hdw,hdw_desc->description);
         pvr2_trace(PVR2_TRACE_INFO, "Hardware description: %s",
                 hdw_desc->description);
+        if (hdw_desc->flag_is_experimental) {
+                pvr2_trace(PVR2_TRACE_INFO, "**********");
+                pvr2_trace(PVR2_TRACE_INFO,
+                           "WARNING: Support for this device (%s) is"
+                           " experimental.", hdw_desc->description);
+                pvr2_trace(PVR2_TRACE_INFO,
+                           "Important functionality might not be"
+                           " entirely working.");
+                pvr2_trace(PVR2_TRACE_INFO,
+                           "Please consider contacting the driver author to"
+                           " help with further stabilization of the driver.");
+                pvr2_trace(PVR2_TRACE_INFO, "**********");
+        }
         if (!hdw) goto fail;
 
         init_timer(&hdw->quiescent_timer);