From 7e560814de1972e1bfc780616841d7a0032ca467 Mon Sep 17 00:00:00 2001 From: Cornelia Huck Date: Wed, 12 Jul 2006 16:40:19 +0200 Subject: [S390] path grouping and path verifications fixes. 1. Multipath devices for which SetPGID is not supported are not handled well. Use NOP ccws for path verification (sans path grouping) when SetPGID is not supported. 2. Check for PGIDs already set with SensePGID on _all_ paths (not just the first one) and try to find a common one. Moan if no common PGID can be found (and use NOP verification). If no PGIDs have been set, use the css global PGID (as before). (Rationale: SetPGID will get a command reject if the PGID it tries to set does not match the already set PGID.) 3. Immediately before reboot, issue RESET CHANNEL PATH (rcp) on all chpids. This will remove the old PGIDs. rcp will generate solicited CRWs which can be savely ignored by the machine check handler (all other actions create unsolicited CRWs). Signed-off-by: Cornelia Huck Signed-off-by: Martin Schwidefsky --- include/asm-s390/cio.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/asm-s390') diff --git a/include/asm-s390/cio.h b/include/asm-s390/cio.h index 2b1619306351..28fdd6e2b8ba 100644 --- a/include/asm-s390/cio.h +++ b/include/asm-s390/cio.h @@ -276,6 +276,8 @@ extern void wait_cons_dev(void); extern void clear_all_subchannels(void); +extern void cio_reset_channel_paths(void); + extern void css_schedule_reprobe(void); #endif -- cgit v1.2.2