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Until now, UDP RSS support could not be relied on due to a problem in the Linux kernel implementation and mlx4 RSS capabilities were not reported at all, hence the PMD had to make assumptions. Since both issues will be addressed simultaneously in Linux 4.15 (related patches already upstream) and likely backported afterward, UDP RSS support can be enabled by probing RSS capabilities. Signed-off-by: Adrien Mazarguil <adrien.mazarguil@6wind.com> Acked-by: Neil Horman <nhorman@tuxdriver.com>