Stop using drmCommandWriteRead for such a simple ioctl.

v2: Handle errno correctly. [ickle]
---
 src/mesa/drivers/dri/i965/intel_screen.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/intel_screen.c 
b/src/mesa/drivers/dri/i965/intel_screen.c
index f724a56..1c71e09 100644
--- a/src/mesa/drivers/dri/i965/intel_screen.c
+++ b/src/mesa/drivers/dri/i965/intel_screen.c
@@ -972,17 +972,18 @@ static const __DRIextension 
*intelRobustScreenExtensions[] = {
 static int
 intel_get_param(struct intel_screen *screen, int param, int *value)
 {
-   int ret;
+   int ret = 0;
    struct drm_i915_getparam gp;
 
    memset(&gp, 0, sizeof(gp));
    gp.param = param;
    gp.value = value;
 
-   ret = drmCommandWriteRead(screen->driScrnPriv->fd,
-                             DRM_I915_GETPARAM, &gp, sizeof(gp));
-   if (ret < 0 && ret != -EINVAL)
-        _mesa_warning(NULL, "drm_i915_getparam: %d", ret);
+   if (drmIoctl(screen->driScrnPriv->fd, DRM_IOCTL_I915_GETPARAM, &gp) == -1) {
+      ret = -errno;
+      if (ret != -EINVAL)
+         _mesa_warning(NULL, "drm_i915_getparam: %d", ret);
+   }
 
    return ret;
 }
-- 
2.9.0.rc2

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