serial: fsl_lpuart: use UARTDATA_MASK macro

Use the corresponding macro instead of the magic number. While at it,
drop the useless cast to "unsigned char".

Signed-off-by: Michael Walle <michael@walle.cc>
Link: https://lore.kernel.org/r/20210512141255.18277-3-michael@walle.cc
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
index 120527cb8a819b75bec7ac8c50e1f941fd649f42..cabfc1c5d7014011ae14d34fda7907140d67642a 100644 (file)
--- a/drivers/tty/serial/fsl_lpuart.c
+++ b/drivers/tty/serial/fsl_lpuart.c
@@ -928,9 +928,9 @@ static void lpuart32_rxint(struct lpuart_port *sport)
                 */
                sr = lpuart32_read(&sport->port, UARTSTAT);
                rx = lpuart32_read(&sport->port, UARTDATA);
-               rx &= 0x3ff;
+               rx &= UARTDATA_MASK;
 
-               if (uart_handle_sysrq_char(&sport->port, (unsigned char)rx))
+               if (uart_handle_sysrq_char(&sport->port, rx))
                        continue;
 
                if (sr & (UARTSTAT_PE | UARTSTAT_OR | UARTSTAT_FE)) {