From 20627cc5d5d5da9cab63a884333a94f3ff170ef1 Mon Sep 17 00:00:00 2001
From: David Schleef <ds@schleef.org>
Date: Mon, 11 Feb 2013 17:39:24 -0800
Subject: [PATCH] mfc: quiet debugging when mfc device doesn't exist

Avoid registering the element if the mfc device doesn't work,
but allow plugin loading to succeed.
---
 sys/mfc/gstmfc.c                  |  2 +-
 sys/mfc/mfc_decoder/mfc_decoder.c | 11 ++++++++++-
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/sys/mfc/gstmfc.c b/sys/mfc/gstmfc.c
index 79c4de231d..7fb22cee1f 100644
--- a/sys/mfc/gstmfc.c
+++ b/sys/mfc/gstmfc.c
@@ -39,7 +39,7 @@ plugin_init (GstPlugin * plugin)
   if (!context) {
     GST_CAT_DEBUG (GST_CAT_PLUGIN_LOADING,
         "Failed to initialize MFC decoder context");
-    return FALSE;
+    return TRUE;
   }
   mfc_dec_destroy (context);
 
diff --git a/sys/mfc/mfc_decoder/mfc_decoder.c b/sys/mfc/mfc_decoder/mfc_decoder.c
index 31b82f91f8..b050ded009 100644
--- a/sys/mfc/mfc_decoder/mfc_decoder.c
+++ b/sys/mfc/mfc_decoder/mfc_decoder.c
@@ -51,6 +51,7 @@
 #include <unistd.h>
 #include <sys/ioctl.h>
 #include <sys/mman.h>
+#include <sys/stat.h>
 #include <linux/videodev2.h>
 
 /* For logging */
@@ -279,6 +280,7 @@ struct mfc_dec_context* mfc_dec_create(unsigned int codec)
 {
     struct mfc_dec_context *ctx;
     struct v4l2_capability caps;
+    struct stat sb;
 
     pthread_mutex_lock(&mutex);
     if (mfc_in_use) {
@@ -295,10 +297,17 @@ struct mfc_dec_context* mfc_dec_create(unsigned int codec)
         GST_ERROR ("Unable to allocate memory for context");
         return NULL;
     }
+
+    if (stat (MFC_PATH, &sb) < 0) {
+        GST_INFO ("MFC device node doesn't exist, failing quietly");
+        free(ctx);
+        return NULL;
+    }
+
     GST_INFO ("Opening MFC device node at: %s", MFC_PATH);
     ctx->fd = open(MFC_PATH, O_RDWR, 0);
     if (ctx->fd == -1) {
-        GST_ERROR ("Unable to open MFC device node: %d", errno);
+        GST_WARNING ("Unable to open MFC device node: %d", errno);
         free(ctx);
         return NULL;
     }