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-rw-r--r--qemu-char.c87
1 files changed, 61 insertions, 26 deletions
diff --git a/qemu-char.c b/qemu-char.c
index 25abdc8d34..40bd7e8a69 100644
--- a/qemu-char.c
+++ b/qemu-char.c
@@ -1007,33 +1007,68 @@ static void tty_serial_init(int fd, int speed,
#endif
tcgetattr (fd, &tty);
-#define MARGIN 1.1
- if (speed <= 50 * MARGIN)
- spd = B50;
- else if (speed <= 75 * MARGIN)
- spd = B75;
- else if (speed <= 300 * MARGIN)
- spd = B300;
- else if (speed <= 600 * MARGIN)
- spd = B600;
- else if (speed <= 1200 * MARGIN)
- spd = B1200;
- else if (speed <= 2400 * MARGIN)
- spd = B2400;
- else if (speed <= 4800 * MARGIN)
- spd = B4800;
- else if (speed <= 9600 * MARGIN)
- spd = B9600;
- else if (speed <= 19200 * MARGIN)
- spd = B19200;
- else if (speed <= 38400 * MARGIN)
- spd = B38400;
- else if (speed <= 57600 * MARGIN)
- spd = B57600;
- else if (speed <= 115200 * MARGIN)
- spd = B115200;
- else
+#define check_speed(val) if (speed <= val) { spd = B##val; break; }
+ speed = speed * 10 / 11;
+ do {
+ check_speed(50);
+ check_speed(75);
+ check_speed(110);
+ check_speed(134);
+ check_speed(150);
+ check_speed(200);
+ check_speed(300);
+ check_speed(600);
+ check_speed(1200);
+ check_speed(1800);
+ check_speed(2400);
+ check_speed(4800);
+ check_speed(9600);
+ check_speed(19200);
+ check_speed(38400);
+ /* Non-Posix values follow. They may be unsupported on some systems. */
+ check_speed(57600);
+ check_speed(115200);
+#ifdef B230400
+ check_speed(230400);
+#endif
+#ifdef B460800
+ check_speed(460800);
+#endif
+#ifdef B500000
+ check_speed(500000);
+#endif
+#ifdef B576000
+ check_speed(576000);
+#endif
+#ifdef B921600
+ check_speed(921600);
+#endif
+#ifdef B1000000
+ check_speed(1000000);
+#endif
+#ifdef B1152000
+ check_speed(1152000);
+#endif
+#ifdef B1500000
+ check_speed(1500000);
+#endif
+#ifdef B2000000
+ check_speed(2000000);
+#endif
+#ifdef B2500000
+ check_speed(2500000);
+#endif
+#ifdef B3000000
+ check_speed(3000000);
+#endif
+#ifdef B3500000
+ check_speed(3500000);
+#endif
+#ifdef B4000000
+ check_speed(4000000);
+#endif
spd = B115200;
+ } while (0);
cfsetispeed(&tty, spd);
cfsetospeed(&tty, spd);