[S390] cio: Introduce abstract isc definitions.

Replace the numeric values for I/O interruption subclass usage
with abstract definitions and collect them all in asm/isc.h.
This gives us a better overview of which iscs are actually used
and makes it possible to better spread out isc usage in the
future.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

1 files changed, 7 insertions, 6 deletions

diff --git a/drivers/s390/cio/cio.c b/drivers/s390/cio/cio.c
index c24dfcd858da..a4f9130910d6 100644
--- a/drivers/s390/cio/cio.c
+++ b/drivers/s390/cio/cio.c
@@ -24,6 +24,7 @@
 #include <asm/ipl.h>
 #include <asm/chpid.h>
 #include <asm/airq.h>
+#include <asm/isc.h>
 #include <asm/cpu.h>
 #include <asm/fcx.h>
 #include "cio.h"
@@ -699,9 +700,9 @@ void wait_cons_dev(void)
         if (!console_subchannel_in_use)
                 return;
 
-        /* disable all but isc 1 (console device) */
+        /* disable all but the console isc */
         __ctl_store (save_cr6, 6, 6);
-        cr6 = 0x40000000;
+        cr6 = 1UL << (31 - CONSOLE_ISC);
         __ctl_load (cr6, 6, 6);
 
         do {
@@ -783,10 +784,10 @@ cio_probe_console(void)
         }
 
         /*
-         * enable console I/O-interrupt subclass 1
+         * enable console I/O-interrupt subclass
          */
-        ctl_set_bit(6, 30);
-        console_subchannel.schib.pmcw.isc = 1;
+        ctl_set_bit(6, 31 - CONSOLE_ISC);
+        console_subchannel.schib.pmcw.isc = CONSOLE_ISC;
         console_subchannel.schib.pmcw.intparm =
                 (u32)(addr_t)&console_subchannel;
         ret = cio_modify(&console_subchannel);
@@ -802,7 +803,7 @@ cio_release_console(void)
 {
         console_subchannel.schib.pmcw.intparm = 0;
         cio_modify(&console_subchannel);
-        ctl_clear_bit(6, 30);
+        ctl_clear_bit(6, 31 - CONSOLE_ISC);
         console_subchannel_in_use = 0;
 }