net: usb: asix: refactor asix_read_phy_addr() and handle errors on return
Refactor asix_read_phy_addr() to return usable error value directly and make sure all callers handle this error. Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> Signed-off-by: David S. Miller <davem@davemloft.net>
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