debug lockups: Improve lockup detection, fix generic arch fallback

[pandora-kernel.git] / drivers / char / mxser.c

diff --git a/drivers/char/mxser.c b/drivers/char/mxser.c
index 13f8871..dbf8d52 100644 (file)
--- a/drivers/char/mxser.c
+++ b/drivers/char/mxser.c
@@ -23,6 +23,7 @@
 #include <linux/errno.h>
 #include <linux/signal.h>
 #include <linux/sched.h>
+#include <linux/smp_lock.h>
 #include <linux/timer.h>
 #include <linux/interrupt.h>
 #include <linux/tty.h>
@@ -547,14 +548,18 @@ static int mxser_carrier_raised(struct tty_port *port)
        return (inb(mp->ioaddr + UART_MSR) & UART_MSR_DCD)?1:0;
 }
 
-static void mxser_raise_dtr_rts(struct tty_port *port)
+static void mxser_dtr_rts(struct tty_port *port, int on)
 {
        struct mxser_port *mp = container_of(port, struct mxser_port, port);
        unsigned long flags;
 
        spin_lock_irqsave(&mp->slock, flags);
-       outb(inb(mp->ioaddr + UART_MCR) |
-               UART_MCR_DTR | UART_MCR_RTS, mp->ioaddr + UART_MCR);
+       if (on)
+               outb(inb(mp->ioaddr + UART_MCR) |
+                       UART_MCR_DTR | UART_MCR_RTS, mp->ioaddr + UART_MCR);
+       else
+               outb(inb(mp->ioaddr + UART_MCR)&~(UART_MCR_DTR | UART_MCR_RTS),
+                       mp->ioaddr + UART_MCR);
        spin_unlock_irqrestore(&mp->slock, flags);
 }
 
@@ -1044,8 +1049,6 @@ static int mxser_open(struct tty_struct *tty, struct file *filp)
        if (retval)
                return retval;
 
-       /* unmark here for very high baud rate (ex. 921600 bps) used */
-       tty->low_latency = 1;
        return 0;
 }
 
@@ -2356,7 +2359,7 @@ static const struct tty_operations mxser_ops = {
 
 struct tty_port_operations mxser_port_ops = {
        .carrier_raised = mxser_carrier_raised,
-       .raise_dtr_rts = mxser_raise_dtr_rts,
+       .dtr_rts = mxser_dtr_rts,
 };
 
 /*