[Beignet] [PATCH 1/2] report errors if opening the DRI device fails

[Mario Kicherer]

Signed-off-by: Mario Kicherer <dev at kicherer.org>
---
 src/intel/intel_driver.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/intel/intel_driver.c b/src/intel/intel_driver.c
index cfbb302..f88a105 100644
--- a/src/intel/intel_driver.c
+++ b/src/intel/intel_driver.c
@@ -204,7 +204,7 @@ intel_driver_open(intel_driver_t *intel, cl_context_prop props)
   }
 
   if(!intel_driver_is_active(intel)) {
-    printf("Trying to open directly...");
+    printf("Trying to open directly...\n");
     char card_name[20];
     for(cardi = 0; cardi < 16; cardi++) {
       sprintf(card_name, "/dev/dri/card%d", cardi);
@@ -276,7 +276,10 @@ intel_driver_init_master(intel_driver_t *driver, const char* dev_name)
 
   // usually dev_name = "/dev/dri/card%d"
   dev_fd = open(dev_name, O_RDWR);
-  if (dev_fd == -1) return 0;
+  if (dev_fd == -1) {
+    printf("open(\"%s\", O_RDWR) failed: %s\n", dev_name, strerror(errno));
+    return 0;
+  }
 
   // Check that we're authenticated and the only opener
   memset(&client, 0, sizeof(drm_client_t));
@@ -284,6 +287,7 @@ intel_driver_init_master(intel_driver_t *driver, const char* dev_name)
   assert (ret == 0);
 
   if (!client.auth) {
+    printf("%s not authenticated\n", dev_name);
     close(dev_fd);
     return 0;
   }
@@ -291,6 +295,7 @@ intel_driver_init_master(intel_driver_t *driver, const char* dev_name)
   client.idx = 1;
   ret = ioctl(dev_fd, DRM_IOCTL_GET_CLIENT, &client);
   if (ret != -1 || errno != EINVAL) {
+    printf("%s is already in use\n", dev_name);
     close(dev_fd);
     return 0;
   }
-- 
1.8.3.2