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If there is no incoming package than axiemac_recv will return -1 which in turn leads to printing `eth_rx: recv() returned error -1` error message in eth_rx function. But missing a package is not an fatal error, so return -EAGAIN in that case would be more suitable. Signed-off-by: Maksim Kiselev <bigunclemax@gmail.com> Link: https://lore.kernel.org/r/20230719065337.69280-1-bigunclemax@gmail.com Signed-off-by: Michal Simek <michal.simek@amd.com>