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path: root/drivers/s390/cio/chsc.c
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Diffstat (limited to 'drivers/s390/cio/chsc.c')
-rw-r--r--drivers/s390/cio/chsc.c15
1 files changed, 10 insertions, 5 deletions
diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c
index 007aaeb4f53..5de86908b0d 100644
--- a/drivers/s390/cio/chsc.c
+++ b/drivers/s390/cio/chsc.c
@@ -217,6 +217,8 @@ void chsc_chp_offline(struct chp_id chpid)
if (chp_get_status(chpid) <= 0)
return;
+ /* Wait until previous actions have settled. */
+ css_wait_for_slow_path();
for_each_subchannel_staged(s390_subchannel_remove_chpid, NULL, &chpid);
}
@@ -303,7 +305,8 @@ static void s390_process_res_acc (struct res_acc_data *res_data)
sprintf(dbf_txt, "fla%x", res_data->fla);
CIO_TRACE_EVENT( 2, dbf_txt);
}
-
+ /* Wait until previous actions have settled. */
+ css_wait_for_slow_path();
/*
* I/O resources may have become accessible.
* Scan through all subchannels that may be concerned and
@@ -561,9 +564,12 @@ void chsc_chp_online(struct chp_id chpid)
sprintf(dbf_txt, "cadd%x.%02x", chpid.cssid, chpid.id);
CIO_TRACE_EVENT(2, dbf_txt);
- if (chp_get_status(chpid) != 0)
+ if (chp_get_status(chpid) != 0) {
+ /* Wait until previous actions have settled. */
+ css_wait_for_slow_path();
for_each_subchannel_staged(__chp_add, __chp_add_new_sch,
&chpid);
+ }
}
static void __s390_subchannel_vary_chpid(struct subchannel *sch,
@@ -650,6 +656,8 @@ __s390_vary_chpid_on(struct subchannel_id schid, void *data)
*/
int chsc_chp_vary(struct chp_id chpid, int on)
{
+ /* Wait until previous actions have settled. */
+ css_wait_for_slow_path();
/*
* Redo PathVerification on the devices the chpid connects to
*/
@@ -758,7 +766,6 @@ chsc_secm(struct channel_subsystem *css, int enable)
if (!secm_area)
return -ENOMEM;
- mutex_lock(&css->mutex);
if (enable && !css->cm_enabled) {
css->cub_addr1 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
css->cub_addr2 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
@@ -766,7 +773,6 @@ chsc_secm(struct channel_subsystem *css, int enable)
free_page((unsigned long)css->cub_addr1);
free_page((unsigned long)css->cub_addr2);
free_page((unsigned long)secm_area);
- mutex_unlock(&css->mutex);
return -ENOMEM;
}
}
@@ -787,7 +793,6 @@ chsc_secm(struct channel_subsystem *css, int enable)
free_page((unsigned long)css->cub_addr1);
free_page((unsigned long)css->cub_addr2);
}
- mutex_unlock(&css->mutex);
free_page((unsigned long)secm_area);
return ret;
}