[S390] cio: Fix inverted isc priorities.
Priorities for I/O interruption subclasses range from 0 (highest)
to 7 (lowest). Unfortunately, the console has been using isc 7
instead of an isc with a higher priority than regular I/O
subchannels (which use 3). Fix this by making the console use
isc 1.
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/drivers/s390/cio/cio.c b/drivers/s390/cio/cio.c
index 82c6a2d..b32d7eb3 100644
--- a/drivers/s390/cio/cio.c
+++ b/drivers/s390/cio/cio.c
@@ -576,12 +576,14 @@
err = -ENODEV;
goto out;
}
- if (cio_is_console(sch->schid))
+ if (cio_is_console(sch->schid)) {
sch->opm = 0xff;
- else
+ sch->isc = 1;
+ } else {
sch->opm = chp_get_sch_opm(sch);
+ sch->isc = 3;
+ }
sch->lpm = sch->schib.pmcw.pam & sch->opm;
- sch->isc = 3;
CIO_MSG_EVENT(6, "Detected device %04x on subchannel 0.%x.%04X "
"- PIM = %02X, PAM = %02X, POM = %02X\n",
@@ -704,9 +706,9 @@
if (!console_subchannel_in_use)
return;
- /* disable all but isc 7 (console device) */
+ /* disable all but isc 1 (console device) */
__ctl_store (save_cr6, 6, 6);
- cr6 = 0x01000000;
+ cr6 = 0x40000000;
__ctl_load (cr6, 6, 6);
do {
@@ -788,11 +790,11 @@
}
/*
- * enable console I/O-interrupt subclass 7
+ * enable console I/O-interrupt subclass 1
*/
- ctl_set_bit(6, 24);
- console_subchannel.isc = 7;
- console_subchannel.schib.pmcw.isc = 7;
+ ctl_set_bit(6, 30);
+ console_subchannel.isc = 1;
+ console_subchannel.schib.pmcw.isc = 1;
console_subchannel.schib.pmcw.intparm =
(u32)(addr_t)&console_subchannel;
ret = cio_modify(&console_subchannel);