1 files changed, 14 insertions, 14 deletions

diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c
index bc36edff2058..7aca22c9976d 100644
--- a/drivers/serial/8250.c
+++ b/drivers/serial/8250.c
@@ -31,7 +31,6 @@
 #include <linux/init.h>
 #include <linux/console.h>
 #include <linux/sysrq.h>
-#include <linux/mca.h>
 #include <linux/delay.h>
 #include <linux/platform_device.h>
 #include <linux/tty.h>
@@ -2027,12 +2026,6 @@ static void serial8250_config_port(struct uart_port *port, int flags)
         int ret;
 
         /*
-         * Don't probe for MCA ports on non-MCA machines.
-         */
-        if (up->port.flags & UPF_BOOT_ONLYMCA && !MCA_bus)
-                return;
-
-        /*
          * Find the region that we can probe for.  This in turn
          * tells us whether we can probe for the type of port.
          */
@@ -2164,7 +2157,7 @@ serial8250_register_ports(struct uart_driver *drv, struct device *dev)
 /*
  *      Wait for transmitter & holding register to empty
  */
-static inline void wait_for_xmitr(struct uart_8250_port *up)
+static inline void wait_for_xmitr(struct uart_8250_port *up, int bits)
 {
         unsigned int status, tmout = 10000;
 
@@ -2178,7 +2171,7 @@ static inline void wait_for_xmitr(struct uart_8250_port *up)
                 if (--tmout == 0)
                         break;
                 udelay(1);
-        } while ((status & BOTH_EMPTY) != BOTH_EMPTY);
+        } while ((status & bits) != bits);
 
         /* Wait up to 1s for flow control if necessary */
         if (up->port.flags & UPF_CONS_FLOW) {
@@ -2205,7 +2198,7 @@ serial8250_console_write(struct console *co, const char *s, unsigned int count)
         touch_nmi_watchdog();
 
         /*
-         *      First save the UER then disable the interrupts
+         *      First save the IER then disable the interrupts
          */
         ier = serial_in(up, UART_IER);
 
@@ -2218,7 +2211,7 @@ serial8250_console_write(struct console *co, const char *s, unsigned int count)
          *      Now, do each character
          */
         for (i = 0; i < count; i++, s++) {
-                wait_for_xmitr(up);
+                wait_for_xmitr(up, UART_LSR_THRE);
 
                 /*
                  *      Send the character out.
@@ -2226,7 +2219,7 @@ serial8250_console_write(struct console *co, const char *s, unsigned int count)
                  */
                 serial_out(up, UART_TX, *s);
                 if (*s == 10) {
-                        wait_for_xmitr(up);
+                        wait_for_xmitr(up, UART_LSR_THRE);
                         serial_out(up, UART_TX, 13);
                 }
         }
@@ -2235,8 +2228,9 @@ serial8250_console_write(struct console *co, const char *s, unsigned int count)
          *      Finally, wait for transmitter to become empty
          *      and restore the IER
          */
-        wait_for_xmitr(up);
-        serial_out(up, UART_IER, ier);
+        wait_for_xmitr(up, BOTH_EMPTY);
+        up->ier |= UART_IER_THRI;
+        serial_out(up, UART_IER, ier | UART_IER_THRI);
 }
 
 static int serial8250_console_setup(struct console *co, char *options)
@@ -2332,6 +2326,12 @@ static struct uart_driver serial8250_reg = {
         .cons                   = SERIAL8250_CONSOLE,
 };
 
+/*
+ * early_serial_setup - early registration for 8250 ports
+ *
+ * Setup an 8250 port structure prior to console initialisation.  Use
+ * after console initialisation will cause undefined behaviour.
+ */
 int __init early_serial_setup(struct uart_port *port)
 {
         if (port->line >= ARRAY_SIZE(serial8250_ports))