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authorStefan Agner <stefan@agner.ch>2015-03-13 14:51:50 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-03-26 23:13:14 +0100
commit4e8f245937091b2c9eebf3d4909c9ceda4f0a78e (patch)
tree3e62e7f3bc6285b8df52ea04bec5cf54f662b41f /drivers/tty
parente91d863d1aaeda0349aed42dfbd75c98e042a2c9 (diff)
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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>
Diffstat (limited to 'drivers/tty')
-rw-r--r--drivers/tty/serial/fsl_lpuart.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
index b1893f3..7ec9110 100644
--- a/drivers/tty/serial/fsl_lpuart.c
+++ b/drivers/tty/serial/fsl_lpuart.c
@@ -1076,6 +1076,8 @@ static int lpuart_startup(struct uart_port *port)
sport->txfifo_size = 0x1 << (((temp >> UARTPFIFO_TXSIZE_OFF) &
UARTPFIFO_FIFOSIZE_MASK) + 1);
+ sport->port.fifosize = sport->txfifo_size;
+
sport->rxfifo_size = 0x1 << (((temp >> UARTPFIFO_RXSIZE_OFF) &
UARTPFIFO_FIFOSIZE_MASK) + 1);
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