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Major/minor numbers are a.. major (ha) source of pain in FreeBSD porting. In this case, Xwayland was thinking that /dev/dri/card0 is already a render node, because the st_rdev on FreeBSD was passing the Linux-style check, and because of the assumption, acceleration would fail because various ioctls like AMDGPU_INFO would be denied on the non-render node. Switch to libdrm's function that already works correctly on all platforms. Signed-off-by: Greg V <greg@unrelenting.technology> Reviewed-by: Emmanuel Vadot <manu@FreeBSD.org> (cherry picked from commit 239ebdc9)
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