tree 5f76e406512b415579cf83baad55828c553b7515
parent 4117a60c8e4c8d5f9fc05578e359d09d0fdf9d07
author Jakub Kicinski <kubakici@wp.pl> 1432927228 +0200
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1433108847 +0900

sc16is7xx: use LSR_TEMT_BIT in .tx_empty()

LSR_TEMT_BIT (LSR bit 6) provides us exactly the information
we need to determine if transmission is finished - FIFO level
and shift register empty.  We can save ourselves reading FIFO
level explicitly if we use this bit.

Signed-off-by: Jakub Kicinski <kubakici@wp.pl>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>