On Mon, May 27, 2019 at 02:01:27PM +0900, Sugaya Taichi wrote:
> Drop the if-statement which refers to 8th bit field of u8 variable.
> The bit field is no longer used.
>
> Fixes: ba44dc043004 ("serial: Add Milbeaut serial control")
> Reported-by: Colin Ian King <colin.k...@canonical.com>
> Signed-off-by: Sugaya Taichi <sugaya.tai...@socionext.com>
> ---
> drivers/tty/serial/milbeaut_usio.c | 15 +++++----------
> 1 file changed, 5 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/tty/serial/milbeaut_usio.c
> b/drivers/tty/serial/milbeaut_usio.c
> index 949ab7e..d7207ab 100644
> --- a/drivers/tty/serial/milbeaut_usio.c
> +++ b/drivers/tty/serial/milbeaut_usio.c
> @@ -56,7 +56,6 @@
> #define MLB_USIO_SSR_FRE BIT(4)
> #define MLB_USIO_SSR_PE BIT(5)
> #define MLB_USIO_SSR_REC BIT(7)
> -#define MLB_USIO_SSR_BRK BIT(8)
> #define MLB_USIO_FCR_FE1 BIT(0)
> #define MLB_USIO_FCR_FE2 BIT(1)
> #define MLB_USIO_FCR_FCL1 BIT(2)
> @@ -180,18 +179,14 @@ static void mlb_usio_rx_chars(struct uart_port *port)
> if (status & MLB_USIO_SSR_ORE)
> port->icount.overrun++;
> status &= port->read_status_mask;
> - if (status & MLB_USIO_SSR_BRK) {
> - flag = TTY_BREAK;
> + if (status & MLB_USIO_SSR_PE) {
> + flag = TTY_PARITY;
> ch = 0;
> } else
> - if (status & MLB_USIO_SSR_PE) {
> - flag = TTY_PARITY;
> + if (status & MLB_USIO_SSR_FRE) {
> + flag = TTY_FRAME;
> ch = 0;
> - } else
> - if (status & MLB_USIO_SSR_FRE) {
> - flag = TTY_FRAME;
> - ch = 0;
> - }
> + }
> if (flag)
> uart_insert_char(port, status, MLB_USIO_SSR_ORE,
> ch, flag);
While the code never actually supported Break, you are explicitly
removing that logic now. So shouldn't you instead _fix_ break handling?
The code before and after your change does not work any differently, so
this patch isn't really needed at this point.
thanks,
greg k-h
