tree f222b7ac19317e981b325d0c8fdc53fb543b9039
parent acf1c02f023926b8b04672a9e81b1711ae681619
author Russell King <rmk+kernel@armlinux.org.uk> 1512050356 +0000
committer David S. Miller <davem@davemloft.net> 1512159522 -0500

sfp: improve RX_LOS handling

There are two bits in the option word for the RX_LOS signal.  One
reports that the RX_LOS signal is active high, the other reports that
it is active low.  When both or neither are set, the result is not
well defined in the specification.

Rather than assuming that neither set means normal RX_LOS, take this
as meaning no RX_LOS signal available, thereby ignoring the signal.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>