[PATCHv2] dri2: Set vdpau driver name if ddx does not provide any driver name

[Adel Gadllah]

Currently when the ddx does not set any driver name we set DRI2 driver but
not the VDPAU driver name. The result is that VDPAU drivers will not get found
by libvdpau when the modesetting driver is being used.

Just assume that the VDPAU driver matches the DRI2 driver name, this is true
for nouveau, r300, r600 and radeonsi i.e all VDPAU drivers currently supported
by mesa.

Signed-off-by: Adel Gadllah <adel.gadllah at gmail.com>
---
 hw/xfree86/dri2/dri2.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/hw/xfree86/dri2/dri2.c b/hw/xfree86/dri2/dri2.c
index c8fcd62..68518c4 100644
--- a/hw/xfree86/dri2/dri2.c
+++ b/hw/xfree86/dri2/dri2.c
@@ -1573,15 +1573,15 @@ DRI2ScreenInit(ScreenPtr pScreen, DRI2InfoPtr info)
 
     if (info->version == 3 || info->numDrivers == 0) {
         /* Driver too old: use the old-style driverName field */
-        ds->numDrivers = 1;
-        ds->driverNames = malloc(sizeof(*ds->driverNames));
+        ds->numDrivers = info->driverName ? 1 : 2;
+        ds->driverNames = malloc(ds->numDrivers * sizeof(*ds->driverNames));
         if (!ds->driverNames)
             goto err_out;
 
         if (info->driverName) {
             ds->driverNames[0] = info->driverName;
         } else {
-            ds->driverNames[0] = dri2_probe_driver_name(pScreen, info);
+            ds->driverNames[0] = ds->driverNames[1] = dri2_probe_driver_name(pScreen, info);
             if (!ds->driverNames[0])
                 return FALSE;
         }
-- 
2.1.0