1 files changed, 22 insertions, 9 deletions

diff --git a/arch/um/drivers/chan_user.c b/arch/um/drivers/chan_user.c
index b88e93b3a39..3fd7c3efdb1 100644
--- a/arch/um/drivers/chan_user.c
+++ b/arch/um/drivers/chan_user.c
@@ -11,9 +11,8 @@
 #include <termios.h>
 #include <sys/ioctl.h>
 #include "chan_user.h"
-#include "os.h"
-#include "um_malloc.h"
-#include "user.h"
+#include <os.h>
+#include <um_malloc.h>
 
 void generic_close(int fd, void *unused)
 {
@@ -74,10 +73,16 @@ void generic_free(void *data)
 
 int generic_console_write(int fd, const char *buf, int n)
 {
+	sigset_t old, no_sigio;
 	struct termios save, new;
 	int err;
 
 	if (isatty(fd)) {
+		sigemptyset(&no_sigio);
+		sigaddset(&no_sigio, SIGIO);
+		if (sigprocmask(SIG_BLOCK, &no_sigio, &old))
+			goto error;
+
 		CATCH_EINTR(err = tcgetattr(fd, &save));
 		if (err)
 			goto error;
@@ -97,8 +102,11 @@ int generic_console_write(int fd, const char *buf, int n)
 	 * Restore raw mode, in any case; we *must* ignore any error apart
 	 * EINTR, except for debug.
 	 */
-	if (isatty(fd))
+	if (isatty(fd)) {
 		CATCH_EINTR(tcsetattr(fd, TCSAFLUSH, &save));
+		sigprocmask(SIG_SETMASK, &old, NULL);
+	}
+
 	return err;
 error:
 	return -errno;
@@ -208,7 +216,7 @@ static int winch_thread(void *arg)
 	}
 }
 
-static int winch_tramp(int fd, struct tty_struct *tty, int *fd_out,
+static int winch_tramp(int fd, struct tty_port *port, int *fd_out,
 		       unsigned long *stack_out)
 {
 	struct winch_data data;
@@ -263,7 +271,7 @@ static int winch_tramp(int fd, struct tty_struct *tty, int *fd_out,
 	return err;
 }
 
-void register_winch(int fd, struct tty_struct *tty)
+void register_winch(int fd, struct tty_port *port)
 {
 	unsigned long stack;
 	int pid, thread, count, thread_fd = -1;
@@ -273,12 +281,17 @@ void register_winch(int fd, struct tty_struct *tty)
 		return;
 
 	pid = tcgetpgrp(fd);
-	if (!is_skas_winch(pid, fd, tty) && (pid == -1)) {
-		thread = winch_tramp(fd, tty, &thread_fd, &stack);
+	if (is_skas_winch(pid, fd, port)) {
+		register_winch_irq(-1, fd, -1, port, 0);
+		return;
+	}
+
+	if (pid == -1) {
+		thread = winch_tramp(fd, port, &thread_fd, &stack);
 		if (thread < 0)
 			return;
 
-		register_winch_irq(thread_fd, fd, thread, tty, stack);
+		register_winch_irq(thread_fd, fd, thread, port, stack);
 
 		count = write(thread_fd, &c, sizeof(c));
 		if (count != sizeof(c))