From 7d82a14d1ab5ccb78b66fde91312ebbc5526a9bc Mon Sep 17 00:00:00 2001
From: Anatoly Baksheev <no@email>
Date: Mon, 8 Aug 2011 09:23:44 +0000
Subject: [PATCH] ticket 1280

---
 modules/gpu/src/initialization.cpp | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/modules/gpu/src/initialization.cpp b/modules/gpu/src/initialization.cpp
index 84da515513..2b7ceea90a 100644
--- a/modules/gpu/src/initialization.cpp
+++ b/modules/gpu/src/initialization.cpp
@@ -190,9 +190,17 @@ void cv::gpu::setDevice(int device)
 
 int cv::gpu::getDevice()
 {
-    int device;    
-    cudaSafeCall( cudaGetDevice( &device ) );
-    return device;
+    int count;
+    cudaError_t error = cudaGetDeviceCount( &count );
+
+    if (error == cudaErrorInsufficientDriver)
+        return -1;
+
+    if (error == cudaErrorNoDevice)
+        return 0;
+
+    cudaSafeCall(error);
+    return count;
 }