From: Cornelia Huck Signed-off-by: Cornelia Huck Signed-off-by: Sebastian Ott Signed-off-by: Martin Schwidefsky --- drivers/s390/cio/chsc_sch.c | 32 +++++++++++++++++++++++++++++++- 1 file changed, 31 insertions(+), 1 deletion(-) Index: linux-2.6/drivers/s390/cio/chsc_sch.c =================================================================== --- linux-2.6.orig/drivers/s390/cio/chsc_sch.c +++ linux-2.6/drivers/s390/cio/chsc_sch.c @@ -1,7 +1,8 @@ /* * Driver for s390 chsc subchannels * - * Copyright IBM Corp. 2008 + * Copyright IBM Corp. 2008, 2009 + * * Author(s): Cornelia Huck * */ @@ -112,6 +113,31 @@ static void chsc_subchannel_shutdown(str cio_disable_subchannel(sch); } +static int chsc_subchannel_prepare(struct subchannel *sch) +{ + int cc; + struct schib schib; + /* + * Don't allow suspend while the subchannel is not idle + * since we don't have a way to clear the subchannel and + * cannot disable it with a request running. + */ + cc = stsch(sch->schid, &schib); + if (!cc && scsw_stctl(&schib.scsw)) + return -EAGAIN; + return 0; +} + +static int chsc_subchannel_freeze(struct subchannel *sch) +{ + return cio_disable_subchannel(sch); +} + +static int chsc_subchannel_restore(struct subchannel *sch) +{ + return cio_enable_subchannel(sch, (u32)(unsigned long)sch); +} + static struct css_device_id chsc_subchannel_ids[] = { { .match_flags = 0x1, .type =SUBCHANNEL_TYPE_CHSC, }, { /* end of list */ }, @@ -125,6 +151,10 @@ static struct css_driver chsc_subchannel .probe = chsc_subchannel_probe, .remove = chsc_subchannel_remove, .shutdown = chsc_subchannel_shutdown, + .prepare = chsc_subchannel_prepare, + .freeze = chsc_subchannel_freeze, + .thaw = chsc_subchannel_restore, + .restore = chsc_subchannel_restore, .name = "chsc_subchannel", }; -- blue skies, Martin. "Reality continues to ruin my life." - Calvin. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/