http://bugs.freedesktop.org/show_bug.cgi?id=26686
--- Comment #6 from Ruslan <b7.10110...@gmail.com> 2010-02-22 08:10:42 PST ---
I added perror() before 'return -errno;' to see what error doesn't report
tiling mode, and got "Invalid argument", i.e. EINVAL. Then i found this in
i915_gem_set_tiling() in the kernel:
if (!i915_tiling_ok(dev, args->stride, obj->size, args->tiling_mode)) {
mutex_lock(&dev->struct_mutex);
drm_gem_object_unreference(obj);
mutex_unlock(&dev->struct_mutex);
return -EINVAL;
}
As you can see, it doesn't change tiling_mode.
So, there should be a check for error after ioctl(), and tiling_mode shouldn't
be considered current.
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