From: Martin Schwidefsky <schwidefsky@de.ibm.com>
Date: Wed, 19 Aug 2015 14:50:10 +0000 (+0200)
Subject: s390/3270: redraw screen on unsolicited device end
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=05bfd70bcdd3cd12c061cb77b73a11ba6f87379d;p=linux.git

s390/3270: redraw screen on unsolicited device end

If a 3270 terminal is disconnected and later reconnected again,
it gets an unsolicited device end. This is currently ignored and
you have to hit the clear key to get the screen redrawn.
Add an automatic full redraw of the screen for this case.

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

diff --git a/drivers/s390/char/con3270.c b/drivers/s390/char/con3270.c
index 75ffe9980c3e1..7c511add5aa7d 100644
--- a/drivers/s390/char/con3270.c
+++ b/drivers/s390/char/con3270.c
@@ -413,6 +413,10 @@ con3270_irq(struct con3270 *cp, struct raw3270_request *rq, struct irb *irb)
 		else
 			/* Normal end. Copy residual count. */
 			rq->rescnt = irb->scsw.cmd.count;
+	} else if (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) {
+		/* Interrupt without an outstanding request -> update all */
+		cp->update_flags = CON_UPDATE_ALL;
+		con3270_set_timer(cp, 1);
 	}
 	return RAW3270_IO_DONE;
 }
diff --git a/drivers/s390/char/tty3270.c b/drivers/s390/char/tty3270.c
index e91b89dc6d1f6..e96fc7fd94984 100644
--- a/drivers/s390/char/tty3270.c
+++ b/drivers/s390/char/tty3270.c
@@ -659,6 +659,10 @@ tty3270_irq(struct tty3270 *tp, struct raw3270_request *rq, struct irb *irb)
 		else
 			/* Normal end. Copy residual count. */
 			rq->rescnt = irb->scsw.cmd.count;
+	} else if (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) {
+		/* Interrupt without an outstanding request -> update all */
+		tp->update_flags = TTY_UPDATE_ALL;
+		tty3270_set_timer(tp, 1);
 	}
 	return RAW3270_IO_DONE;
 }