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| author | Sebastian Ott <sebott@linux.vnet.ibm.com> | 2010-10-25 16:10:32 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> | 2010-10-25 16:10:18 +0200 |
| commit | 62da177ac2bc1f6f3707230070af268b1e689651 (patch) | |
| tree | 287153c19b11b069c55ba6b70cf60ac8c4cfb766 | |
| parent | c38a90a34cfc880eb2f7234c511cdb7d8bdebc45 (diff) | |
| download | linux-62da177ac2bc1f6f3707230070af268b1e689651.tar.bz2 | |
[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.c | 5 | ||||
| -rw-r--r-- | drivers/s390/cio/css.c | 9 |
2 files changed, 12 insertions, 2 deletions
diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c index 44d7cc2f9738..1aaddea673e0 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 5e1235c6aba0..771576bb2928 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 |