s390/chsc: cleanup SEI helper functions

Cleanup the functions used to call SEI.
Also provide !CONFIG_PCI dummys for pci error handling.

Reviewed-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/arch/s390/include/asm/pci.h b/arch/s390/include/asm/pci.h
index b1fa93c..23d6a24 100644 (file)
--- a/arch/s390/include/asm/pci.h
+++ b/arch/s390/include/asm/pci.h
@@ -160,9 +160,14 @@ void zpci_teardown_msi_irq(struct zpci_dev *, struct msi_desc *);
 int zpci_msihash_init(void);
 void zpci_msihash_exit(void);
 
+#ifdef CONFIG_PCI
 /* Error handling and recovery */
 void zpci_event_error(void *);
 void zpci_event_availability(void *);
+#else /* CONFIG_PCI */
+static inline void zpci_event_error(void *e) {}
+static inline void zpci_event_availability(void *e) {}
+#endif /* CONFIG_PCI */
 
 /* Helpers */
 struct zpci_dev *get_zdev(struct pci_dev *);

diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c
index 10729bb..31ceef1 100644 (file)
--- 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)