[S390] pm: con3270 power management callbacks.

Introduce the power management callbacks to the 3270 driver. On suspend
the current 3270 view is deactivated and for non-console 3270 device
the release callback is done. This disconnects the current tty /
fullscreen application from the 3270 device. On resume the current
view is reactivated, on the tty you get a fresh login.
If the system panics before the 3270 device has been resumed, the ccw
device for the 3270 console is reactivated with ccw_device_force_console.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 10 insertions, 6 deletions

diff --git a/drivers/s390/char/fs3270.c b/drivers/s390/char/fs3270.c
index 40759c33477d..097d3846a828 100644
--- a/drivers/s390/char/fs3270.c
+++ b/drivers/s390/char/fs3270.c
@@ -1,11 +1,10 @@
 /*
- *  drivers/s390/char/fs3270.c
- *    IBM/3270 Driver - fullscreen driver.
+ * IBM/3270 Driver - fullscreen driver.
  *
- *  Author(s):
- *    Original 3270 Code for 2.4 written by Richard Hitt (UTS Global)
- *    Rewritten for 2.5/2.6 by Martin Schwidefsky <schwidefsky@de.ibm.com>
- *      -- Copyright (C) 2003 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ * Author(s):
+ *   Original 3270 Code for 2.4 written by Richard Hitt (UTS Global)
+ *   Rewritten for 2.5/2.6 by Martin Schwidefsky <schwidefsky@de.ibm.com>
+ *     Copyright IBM Corp. 2003, 2009
  */
 
 #include <linux/bootmem.h>
@@ -399,6 +398,11 @@ fs3270_free_view(struct raw3270_view *view)
 static void
 fs3270_release(struct raw3270_view *view)
 {
+        struct fs3270 *fp;
+
+        fp = (struct fs3270 *) view;
+        if (fp->fs_pid)
+                kill_pid(fp->fs_pid, SIGHUP, 1);
 }
 
 /* View to a 3270 device. Can be console, tty or fullscreen. */