From ab97d211ef1863942a90d7c93dfd563f0381ca87 Mon Sep 17 00:00:00 2001 From: Sebastian Ott Date: Wed, 9 Sep 2015 10:29:59 +0200 Subject: [PATCH] s390/cio: reactivate cmf after hibernate During resume from hibernate we already reenable measurement block updates on a per device basis. In addition to that we also need to activate channel measurement globally using the set channel monitor instruction. Signed-off-by: Sebastian Ott Reviewed-by: Martin Schwidefsky Reviewed-by: Cornelia Huck Signed-off-by: Martin Schwidefsky --- drivers/s390/cio/cmf.c | 13 +++++++++++++ drivers/s390/cio/css.c | 1 + drivers/s390/cio/device.h | 1 + 3 files changed, 15 insertions(+) diff --git a/drivers/s390/cio/cmf.c b/drivers/s390/cio/cmf.c index de7074f..b2afad5 100644 --- a/drivers/s390/cio/cmf.c +++ b/drivers/s390/cio/cmf.c @@ -1312,6 +1312,19 @@ int cmf_reenable(struct ccw_device *cdev) return cmbops->set(cdev, 2); } +/** + * cmf_reactivate() - reactivate measurement block updates + * + * Use this during resume from hibernate. + */ +void cmf_reactivate(void) +{ + spin_lock(&cmb_area.lock); + if (!list_empty(&cmb_area.list)) + cmf_activate(cmb_area.mem, 1); + spin_unlock(&cmb_area.lock); +} + static int __init init_cmbe(void) { cmbe_cache = kmem_cache_create("cmbe_cache", sizeof(struct cmbe), diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c index 0268e5f..25b4ee1 100644 --- a/drivers/s390/cio/css.c +++ b/drivers/s390/cio/css.c @@ -1089,6 +1089,7 @@ void channel_subsystem_reinit(void) if (chp) chp_update_desc(chp); } + cmf_reactivate(); } #ifdef CONFIG_PROC_FS diff --git a/drivers/s390/cio/device.h b/drivers/s390/cio/device.h index 8d1d298..6b17119 100644 --- a/drivers/s390/cio/device.h +++ b/drivers/s390/cio/device.h @@ -145,6 +145,7 @@ void ccw_device_set_timeout(struct ccw_device *, int); void retry_set_schib(struct ccw_device *cdev); void cmf_retry_copy_block(struct ccw_device *); int cmf_reenable(struct ccw_device *); +void cmf_reactivate(void); int ccw_set_cmf(struct ccw_device *cdev, int enable); extern struct device_attribute dev_attr_cmb_enable; #endif -- 2.7.4