mxser: drop mxser_port::custom_divisor

It's an once-set constant, so define a macro for the constant
(MXSER_CUSTOM_DIVISOR) and use it in the code instead.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210618061516.662-37-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c
index 204b71c..c4ee5cb 100644 (file)
--- a/drivers/tty/mxser.c
+++ b/drivers/tty/mxser.c
@@ -157,6 +157,7 @@
 #define WAKEUP_CHARS           256
 
 #define MXSER_BAUD_BASE                921600
+#define MXSER_CUSTOM_DIVISOR   (MXSER_BAUD_BASE * 16)
 
 #define PCI_DEVICE_ID_POS104UL 0x1044
 #define PCI_DEVICE_ID_CB108    0x1080
@@ -284,8 +285,6 @@ struct mxser_port {
 
        unsigned char ldisc_stop_rx;
 
-       int custom_divisor;
-
        struct async_icount icount; /* kernel counters for 4 input interrupts */
        unsigned int timeout;
 
@@ -1226,7 +1225,7 @@ static int mxser_get_serial_info(struct tty_struct *tty,
        ss->baud_base = MXSER_BAUD_BASE,
        ss->close_delay = close_delay;
        ss->closing_wait = closing_wait;
-       ss->custom_divisor = info->custom_divisor,
+       ss->custom_divisor = MXSER_CUSTOM_DIVISOR,
        mutex_unlock(&port->mutex);
        return 0;
 }
@@ -1285,7 +1284,7 @@ static int mxser_set_serial_info(struct tty_struct *tty,
                if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST &&
                                (ss->baud_base != MXSER_BAUD_BASE ||
                                ss->custom_divisor !=
-                               info->custom_divisor)) {
+                               MXSER_CUSTOM_DIVISOR)) {
                        if (ss->custom_divisor == 0) {
                                mutex_unlock(&port->mutex);
                                return -EINVAL;
@@ -2019,7 +2018,6 @@ static int mxser_initbrd(struct mxser_board *brd)
 
                process_txrx_fifo(info);
 
-               info->custom_divisor = MXSER_BAUD_BASE * 16;
                info->port.close_delay = 5 * HZ / 10;
                info->port.closing_wait = 30 * HZ;
                spin_lock_init(&info->slock);