s390/cio: don't register chpids in reserved state

During IPL we register all chpids that are not in the unrecognized
state. This includes chpids that are not usable and chpids for which
the state could not be obtained.

Change that to only register chpids in the configured (usable) or
standby (usable after a configure operation) state. All other chpids
could only be made available by external control for which we would
receive machine checks.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/drivers/s390/cio/chp.c b/drivers/s390/cio/chp.c
index 46be25c7461e07ed0cc636cf5a1e91a21768abe2..876c7e6e3a99264b169c217389f0b0a22764662d 100644 (file)
--- a/drivers/s390/cio/chp.c
+++ b/drivers/s390/cio/chp.c
@@ -780,7 +780,7 @@ static int cfg_wait_idle(void)
 static int __init chp_init(void)
 {
        struct chp_id chpid;
-       int ret;
+       int state, ret;
 
        ret = crw_register_handler(CRW_RSC_CPATH, chp_process_crw);
        if (ret)
@@ -791,7 +791,9 @@ static int __init chp_init(void)
                return 0;
        /* Register available channel-paths. */
        chp_id_for_each(&chpid) {
-               if (chp_info_get_status(chpid) != CHP_STATUS_NOT_RECOGNIZED)
+               state = chp_info_get_status(chpid);
+               if (state == CHP_STATUS_CONFIGURED ||
+                   state == CHP_STATUS_STANDBY)
                        chp_new(chpid);
        }