[PATCH] Altix ioc4 serial - set hfc from ioctl

Allow hardware flow control to be set from an ioctl.

Signed-off-by: Patrick Gefre <pfg@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 4 insertions, 7 deletions

diff --git a/drivers/serial/ioc4_serial.c b/drivers/serial/ioc4_serial.c
index d054f1265701..f94d2e712cad 100644
--- a/drivers/serial/ioc4_serial.c
+++ b/drivers/serial/ioc4_serial.c
@@ -1765,8 +1765,11 @@ ioc4_change_speed(struct uart_port *the_port,
                 the_port->ignore_status_mask &= ~N_DATA_READY;
         }
 
-        if (cflag & CRTSCTS)
+        if (cflag & CRTSCTS) {
                 info->flags |= ASYNC_CTS_FLOW;
+                port->ip_sscr |= IOC4_SSCR_HFC_EN;
+                writel(port->ip_sscr, &port->ip_serial_regs->sscr);
+        }
         else
                 info->flags &= ~ASYNC_CTS_FLOW;
 
@@ -1825,12 +1828,6 @@ static inline int ic4_startup_local(struct uart_port *the_port)
         /* set the speed of the serial port */
         ioc4_change_speed(the_port, info->tty->termios, (struct termios *)0);
 
-        /* enable hardware flow control - after ioc4_change_speed because
-         * ASYNC_CTS_FLOW is set there */
-        if (info->flags & ASYNC_CTS_FLOW) {
-                port->ip_sscr |= IOC4_SSCR_HFC_EN;
-                writel(port->ip_sscr, &port->ip_serial_regs->sscr);
-        }
         info->flags |= UIF_INITIALIZED;
         return 0;
 }