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[ Upstream commitb69e56cf76] The txpush program in the xdpsock sample application is supposed to send out all packets in the umem in a round-robin fashion. The problem is that it only cycled through the first BATCH_SIZE worth of packets. Fixed this so that it cycles through all buffers in the umem as intended. Fixes:248c7f9c0e("samples/bpf: convert xdpsock to use libbpf for AF_XDP access") Signed-off-by: Weqaar Janjua <weqaar.a.janjua@intel.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Björn Töpel <bjorn.topel@intel.com> Link: https://lore.kernel.org/bpf/20200828161717.42705-1-weqaar.a.janjua@intel.com Signed-off-by: Sasha Levin <sashal@kernel.org>