staging: et131x: stop read when hit max delay in et131x_phy_mii_read
stop read and return error when hit max delay time. Signed-off-by: NZhao, Gang <gamerh2o@gmail.com> Acked-by: NMark Einon <mark.einon@gmail.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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