redonkable/remarkable-linux
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s390/3270: redraw screen on unsolicited device end

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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>
This commit is contained in:
Martin Schwidefsky 2015-08-19 16:50:10 +02:00
parent 42cfc6b590
commit 05bfd70bcd
2 changed files with 8 additions and 0 deletions
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4
drivers/s390/char/con3270.c
View file

@ -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;
}

4
drivers/s390/char/tty3270.c
View file

@ -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;
}