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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>
This commit is contained in:
Sebastian Ott 2016-10-12 11:14:31 +02:00 committed by Martin Schwidefsky
parent 12e721964e
commit 179a98cba1
1 changed files with 4 additions and 2 deletions
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6
drivers/s390/cio/chp.c
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@ -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);
}