Internal requirement for the alignment is that it must be a power-of-two, so enforce rejection at the user interface to execbuffer (which allows the caller to specify a stricter-than-expected alignment criterion).
Signed-off-by: Chris Wilson <[email protected]> --- drivers/gpu/drm/i915/i915_gem_execbuffer.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c index f4fb2bd33753..b14733908d8d 100644 --- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c +++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c @@ -1189,6 +1189,9 @@ validate_exec_list(const struct drm_i915_gem_execbuffer2 *args, if (exec[i].flags & invalid_flags) return -EINVAL; + if (exec[i].alignment && !is_power_of_2(exec[i].alignment)) + return -EINVAL; + /* pad_to_size was once a reserved field, so sanitize it */ if (exec[i].flags & EXEC_OBJECT_PAD_TO_SIZE) { if (offset_in_page(exec[i].pad_to_size)) -- 2.1.4 _______________________________________________ Intel-gfx mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/intel-gfx
