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Diffstat (limited to 'drivers/s390')
-rw-r--r--drivers/s390/cio/chsc.c68
1 files changed, 32 insertions, 36 deletions
diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c
index 10729bbcece..31ceef1beb8 100644
--- a/drivers/s390/cio/chsc.c
+++ b/drivers/s390/cio/chsc.c
@@ -435,7 +435,6 @@ static void chsc_process_sei_scm_change(struct chsc_sei_nt0_area *sei_area)
static void chsc_process_sei_nt2(struct chsc_sei_nt2_area *sei_area)
{
-#ifdef CONFIG_PCI
switch (sei_area->cc) {
case 1:
zpci_event_error(sei_area->ccdf);
@@ -444,11 +443,10 @@ static void chsc_process_sei_nt2(struct chsc_sei_nt2_area *sei_area)
zpci_event_availability(sei_area->ccdf);
break;
default:
- CIO_CRW_EVENT(2, "chsc: unhandled sei content code %d\n",
+ CIO_CRW_EVENT(2, "chsc: sei nt2 unhandled cc=%d\n",
sei_area->cc);
break;
}
-#endif
}
static void chsc_process_sei_nt0(struct chsc_sei_nt0_area *sei_area)
@@ -471,13 +469,19 @@ static void chsc_process_sei_nt0(struct chsc_sei_nt0_area *sei_area)
chsc_process_sei_scm_change(sei_area);
break;
default: /* other stuff */
- CIO_CRW_EVENT(4, "chsc: unhandled sei content code %d\n",
+ CIO_CRW_EVENT(2, "chsc: sei nt0 unhandled cc=%d\n",
sei_area->cc);
break;
}
+
+ /* Check if we might have lost some information. */
+ if (sei_area->flags & 0x40) {
+ CIO_CRW_EVENT(2, "chsc: event overflow\n");
+ css_schedule_eval_all();
+ }
}
-static int __chsc_process_crw(struct chsc_sei *sei, u64 ntsm)
+static void chsc_process_event_information(struct chsc_sei *sei, u64 ntsm)
{
do {
memset(sei, 0, sizeof(*sei));
@@ -488,40 +492,37 @@ static int __chsc_process_crw(struct chsc_sei *sei, u64 ntsm)
if (chsc(sei))
break;
- if (sei->response.code == 0x0001) {
- CIO_CRW_EVENT(2, "chsc: sei successful\n");
-
- /* Check if we might have lost some information. */
- if (sei->u.nt0_area.flags & 0x40) {
- CIO_CRW_EVENT(2, "chsc: event overflow\n");
- css_schedule_eval_all();
- }
-
- switch (sei->nt) {
- case 0:
- chsc_process_sei_nt0(&sei->u.nt0_area);
- break;
- case 2:
- chsc_process_sei_nt2(&sei->u.nt2_area);
- break;
- default:
- CIO_CRW_EVENT(2, "chsc: unhandled nt=%d\n",
- sei->nt);
- break;
- }
- } else {
+ if (sei->response.code != 0x0001) {
CIO_CRW_EVENT(2, "chsc: sei failed (rc=%04x)\n",
sei->response.code);
break;
}
- } while (sei->u.nt0_area.flags & 0x80);
- return 0;
+ CIO_CRW_EVENT(2, "chsc: sei successful (nt=%d)\n", sei->nt);
+ switch (sei->nt) {
+ case 0:
+ chsc_process_sei_nt0(&sei->u.nt0_area);
+ break;
+ case 2:
+ chsc_process_sei_nt2(&sei->u.nt2_area);
+ break;
+ default:
+ CIO_CRW_EVENT(2, "chsc: unhandled nt: %d\n", sei->nt);
+ break;
+ }
+ } while (sei->u.nt0_area.flags & 0x80);
}
+/*
+ * Handle channel subsystem related CRWs.
+ * Use store event information to find out what's going on.
+ *
+ * Note: Access to sei_page is serialized through machine check handler
+ * thread, so no need for locking.
+ */
static void chsc_process_crw(struct crw *crw0, struct crw *crw1, int overflow)
{
- struct chsc_sei *sei;
+ struct chsc_sei *sei = sei_page;
if (overflow) {
css_schedule_eval_all();
@@ -531,14 +532,9 @@ static void chsc_process_crw(struct crw *crw0, struct crw *crw1, int overflow)
"chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n",
crw0->slct, crw0->oflw, crw0->chn, crw0->rsc, crw0->anc,
crw0->erc, crw0->rsid);
- if (!sei_page)
- return;
- /* Access to sei_page is serialized through machine check handler
- * thread, so no need for locking. */
- sei = sei_page;
CIO_TRACE_EVENT(2, "prcss");
- __chsc_process_crw(sei, CHSC_SEI_NT0 | CHSC_SEI_NT2);
+ chsc_process_event_information(sei, CHSC_SEI_NT0 | CHSC_SEI_NT2);
}
void chsc_chp_online(struct chp_id chpid)