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path: root/drivers/serial/8250.c
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Diffstat (limited to 'drivers/serial/8250.c')
-rw-r--r--drivers/serial/8250.c20
1 files changed, 7 insertions, 13 deletions
diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c
index bc36edff2058..b1fc97d5f643 100644
--- a/drivers/serial/8250.c
+++ b/drivers/serial/8250.c
@@ -31,7 +31,6 @@
31#include <linux/init.h> 31#include <linux/init.h>
32#include <linux/console.h> 32#include <linux/console.h>
33#include <linux/sysrq.h> 33#include <linux/sysrq.h>
34#include <linux/mca.h>
35#include <linux/delay.h> 34#include <linux/delay.h>
36#include <linux/platform_device.h> 35#include <linux/platform_device.h>
37#include <linux/tty.h> 36#include <linux/tty.h>
@@ -2027,12 +2026,6 @@ static void serial8250_config_port(struct uart_port *port, int flags)
2027 int ret; 2026 int ret;
2028 2027
2029 /* 2028 /*
2030 * Don't probe for MCA ports on non-MCA machines.
2031 */
2032 if (up->port.flags & UPF_BOOT_ONLYMCA && !MCA_bus)
2033 return;
2034
2035 /*
2036 * Find the region that we can probe for. This in turn 2029 * Find the region that we can probe for. This in turn
2037 * tells us whether we can probe for the type of port. 2030 * tells us whether we can probe for the type of port.
2038 */ 2031 */
@@ -2164,7 +2157,7 @@ serial8250_register_ports(struct uart_driver *drv, struct device *dev)
2164/* 2157/*
2165 * Wait for transmitter & holding register to empty 2158 * Wait for transmitter & holding register to empty
2166 */ 2159 */
2167static inline void wait_for_xmitr(struct uart_8250_port *up) 2160static inline void wait_for_xmitr(struct uart_8250_port *up, int bits)
2168{ 2161{
2169 unsigned int status, tmout = 10000; 2162 unsigned int status, tmout = 10000;
2170 2163
@@ -2178,7 +2171,7 @@ static inline void wait_for_xmitr(struct uart_8250_port *up)
2178 if (--tmout == 0) 2171 if (--tmout == 0)
2179 break; 2172 break;
2180 udelay(1); 2173 udelay(1);
2181 } while ((status & BOTH_EMPTY) != BOTH_EMPTY); 2174 } while ((status & bits) != bits);
2182 2175
2183 /* Wait up to 1s for flow control if necessary */ 2176 /* Wait up to 1s for flow control if necessary */
2184 if (up->port.flags & UPF_CONS_FLOW) { 2177 if (up->port.flags & UPF_CONS_FLOW) {
@@ -2218,7 +2211,7 @@ serial8250_console_write(struct console *co, const char *s, unsigned int count)
2218 * Now, do each character 2211 * Now, do each character
2219 */ 2212 */
2220 for (i = 0; i < count; i++, s++) { 2213 for (i = 0; i < count; i++, s++) {
2221 wait_for_xmitr(up); 2214 wait_for_xmitr(up, UART_LSR_THRE);
2222 2215
2223 /* 2216 /*
2224 * Send the character out. 2217 * Send the character out.
@@ -2226,7 +2219,7 @@ serial8250_console_write(struct console *co, const char *s, unsigned int count)
2226 */ 2219 */
2227 serial_out(up, UART_TX, *s); 2220 serial_out(up, UART_TX, *s);
2228 if (*s == 10) { 2221 if (*s == 10) {
2229 wait_for_xmitr(up); 2222 wait_for_xmitr(up, UART_LSR_THRE);
2230 serial_out(up, UART_TX, 13); 2223 serial_out(up, UART_TX, 13);
2231 } 2224 }
2232 } 2225 }
@@ -2235,8 +2228,9 @@ serial8250_console_write(struct console *co, const char *s, unsigned int count)
2235 * Finally, wait for transmitter to become empty 2228 * Finally, wait for transmitter to become empty
2236 * and restore the IER 2229 * and restore the IER
2237 */ 2230 */
2238 wait_for_xmitr(up); 2231 wait_for_xmitr(up, BOTH_EMPTY);
2239 serial_out(up, UART_IER, ier); 2232 up->ier |= UART_IER_THRI;
2233 serial_out(up, UART_IER, ier | UART_IER_THRI);
2240} 2234}
2241 2235
2242static int serial8250_console_setup(struct console *co, char *options) 2236static int serial8250_console_setup(struct console *co, char *options)