tty: serial: fsl_lpuart: specify transmit FIFO size
authorStefan Agner <stefan@agner.ch>
Fri, 13 Mar 2015 13:51:50 +0000 (14:51 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 26 Mar 2015 22:13:14 +0000 (23:13 +0100)
commit4e8f245937091b2c9eebf3d4909c9ceda4f0a78e
tree3e62e7f3bc6285b8df52ea04bec5cf54f662b41f
parente91d863d1aaeda0349aed42dfbd75c98e042a2c9
tty: serial: fsl_lpuart: specify transmit FIFO size

Specify transmit FIFO size which might be different depending on
LPUART instance. This makes sure uart_wait_until_sent in serial
core getting called, which in turn waits and checks if the FIFO
is really empty on shutdown by using the tx_empty callback.
Without the call of this callback, the last several characters
might not yet be transmitted when closing the serial port. This
can be reproduced by simply using echo and redirect the output to
a ttyLP device.

Signed-off-by: Stefan Agner <stefan@agner.ch>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/tty/serial/fsl_lpuart.c