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authorSebastian Ott <sebott@linux.vnet.ibm.com>2010-10-25 16:10:32 +0200
committerMartin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com>2010-10-25 16:10:18 +0200
commit62da177ac2bc1f6f3707230070af268b1e689651 (patch)
tree287153c19b11b069c55ba6b70cf60ac8c4cfb766
parentc38a90a34cfc880eb2f7234c511cdb7d8bdebc45 (diff)
[S390] css: update descriptor after hibernate
Update the channel path descriptors after hibernation. This is done unlocked, since we are the only active task at this time. Note: chsc_determine_base_channel_path_desc is changed to use spin_lock_irqsave, since it's called with interrupts disabled in this case. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
-rw-r--r--drivers/s390/cio/chsc.c5
-rw-r--r--drivers/s390/cio/css.c9
2 files changed, 12 insertions, 2 deletions
diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c
index 44d7cc2f973..1aaddea673e 100644
--- a/drivers/s390/cio/chsc.c
+++ b/drivers/s390/cio/chsc.c
@@ -680,9 +680,10 @@ int chsc_determine_base_channel_path_desc(struct chp_id chpid,
{
struct chsc_response_struct *chsc_resp;
struct chsc_scpd *scpd_area;
+ unsigned long flags;
int ret;
- spin_lock_irq(&chsc_page_lock);
+ spin_lock_irqsave(&chsc_page_lock, flags);
scpd_area = chsc_page;
ret = chsc_determine_channel_path_desc(chpid, 0, 0, 0, 0, scpd_area);
if (ret)
@@ -690,7 +691,7 @@ int chsc_determine_base_channel_path_desc(struct chp_id chpid,
chsc_resp = (void *)&scpd_area->response;
memcpy(desc, &chsc_resp->data, sizeof(*desc));
out:
- spin_unlock_irq(&chsc_page_lock);
+ spin_unlock_irqrestore(&chsc_page_lock, flags);
return ret;
}
diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c
index 5e1235c6aba..771576bb292 100644
--- a/drivers/s390/cio/css.c
+++ b/drivers/s390/cio/css.c
@@ -1030,7 +1030,16 @@ subsys_initcall_sync(channel_subsystem_init_sync);
void channel_subsystem_reinit(void)
{
+ struct channel_path *chp;
+ struct chp_id chpid;
+
chsc_enable_facility(CHSC_SDA_OC_MSS);
+ chp_id_for_each(&chpid) {
+ chp = chpid_to_chp(chpid);
+ if (!chp)
+ continue;
+ chsc_determine_base_channel_path_desc(chpid, &chp->desc);
+ }
}
#ifdef CONFIG_PROC_FS