From a749b0f48aa63f76e9c33382669b83c83fe9a138 Mon Sep 17 00:00:00 2001
From: Rolf Bensch <roben-guest@alioth.debian.org>
Date: Thu, 16 Feb 2012 18:11:52 +0100
Subject: [PATCH] enable threshold if scanner capability is PIXMA_CAP_LINEART

---
 backend/pixma.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/backend/pixma.c b/backend/pixma.c
index 5a32f70d1..b0fc7a214 100644
--- a/backend/pixma.c
+++ b/backend/pixma.c
@@ -641,7 +641,8 @@ control_option (pixma_sane_t * ss, SANE_Int n,
         }
       break;
     case opt_mode:
-      if (a == SANE_ACTION_SET_VALUE || a == SANE_ACTION_SET_AUTO)
+      if (cfg->cap & (PIXMA_CAP_LINEART)
+          && (a == SANE_ACTION_SET_VALUE || a == SANE_ACTION_SET_AUTO))
         {
           if (ss->mode_map[OVAL (opt_mode).w] == PIXMA_SCAN_MODE_LINEART)
             {