
This patch implements the backward compatibility with the old firmware where the Tx completion IRQ interrupt was absent whereas incase of new firmware the Tx completion IRQ interrupt is present. Signed-off-by: Iyappan Subramanian <isubramanian@apm.com> Signed-off-by: Suman Tripathi <stripathi@apm.com> Signed-off-by: David S. Miller <davem@davemloft.net>