[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>

1 files changed, 11 insertions, 9 deletions

diff --git a/drivers/s390/cio/cio.c b/drivers/s390/cio/cio.c
index 82c6a2d45128..b32d7eb3d81a 100644
--- a/drivers/s390/cio/cio.c
+++ b/drivers/s390/cio/cio.c
@@ -576,12 +576,14 @@ cio_validate_subchannel (struct subchannel *sch, struct subchannel_id schid)
                 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 @@ void wait_cons_dev(void)
         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 @@ cio_probe_console(void)
         }
 
         /*
-         * 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);