Commit 179a98cb authored Oct 12, 2016 by Sebastian Ott Committed by Martin Schwidefsky Oct 17, 2016

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>

parent 12e72196

drivers/s390/cio/chp.c

+4 −2

Original line number	Diff line number	Diff line
		@@ -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);
		}

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