s390/3270: redraw screen on unsolicited device end

[ Upstream commit 05bfd70bcdd3cd12c061cb77b73a11ba6f87379d ]

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>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>

diff --git a/drivers/s390/char/con3270.c b/drivers/s390/char/con3270.c
index 75ffe9980c3e1cb8e141c6e29d01cef98aaf862f..7c511add5aa7d884d8082398198b1aa92a61dc84 100644 (file)
--- 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 e91b89dc6d1f61878e9191c8f66b7a90e32acd44..e96fc7fd9498458b5506789f4b900b813885adda 100644 (file)
--- 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;
 }