Ian Lepore b5496277c7 Do not attempt to refill the TX fifo if there is no data left to transfer.
A comment in bcm_bsc_fill_tx_fifo() even lists sc_totlen > 0 as a
precondition for calling the routine.   I apparently forgot to make the
code do what my comment said.
2017-12-18 02:34:37 +00:00
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