1 files changed, 25 insertions, 12 deletions

diff --git a/drivers/s390/s390mach.c b/drivers/s390/s390mach.c
index e088b5e28711..806bb1a921eb 100644
--- a/drivers/s390/s390mach.c
+++ b/drivers/s390/s390mach.c
@@ -13,22 +13,18 @@
 #include <linux/errno.h>
 #include <linux/workqueue.h>
 #include <linux/time.h>
+#include <linux/device.h>
 #include <linux/kthread.h>
-
+#include <asm/etr.h>
 #include <asm/lowcore.h>
-
+#include <asm/cio.h>
+#include "cio/cio.h"
+#include "cio/chsc.h"
+#include "cio/css.h"
 #include "s390mach.h"
 
 static struct semaphore m_sem;
 
-extern int css_process_crw(int, int);
-extern int chsc_process_crw(void);
-extern int chp_process_crw(int, int);
-extern void css_reiterate_subchannels(void);
-
-extern struct workqueue_struct *slow_path_wq;
-extern struct work_struct slow_path_work;
-
 static NORET_TYPE void
 s390_handle_damage(char *msg)
 {
@@ -470,6 +466,19 @@ s390_do_machine_check(struct pt_regs *regs)
                         s390_handle_damage("unable to revalidate registers.");
         }
 
+        if (mci->cd) {
+                /* Timing facility damage */
+                s390_handle_damage("TOD clock damaged");
+        }
+
+        if (mci->ed && mci->ec) {
+                /* External damage */
+                if (S390_lowcore.external_damage_code & (1U << ED_ETR_SYNC))
+                        etr_sync_check();
+                if (S390_lowcore.external_damage_code & (1U << ED_ETR_SWITCH))
+                        etr_switch_to_local();
+        }
+
         if (mci->se)
                 /* Storage error uncorrected */
                 s390_handle_damage("received storage error uncorrected "
@@ -508,7 +517,7 @@ static int
 machine_check_init(void)
 {
         init_MUTEX_LOCKED(&m_sem);
-        ctl_clear_bit(14, 25);  /* disable external damage MCH */
+        ctl_set_bit(14, 25);    /* enable external damage MCH */
         ctl_set_bit(14, 27);    /* enable system recovery MCH */
 #ifdef CONFIG_MACHCHK_WARNING
         ctl_set_bit(14, 24);    /* enable warning MCH */
@@ -529,7 +538,11 @@ arch_initcall(machine_check_init);
 static int __init
 machine_check_crw_init (void)
 {
-        kthread_run(s390_collect_crw_info, &m_sem, "kmcheck");
+        struct task_struct *task;
+
+        task = kthread_run(s390_collect_crw_info, &m_sem, "kmcheck");
+        if (IS_ERR(task))
+                return PTR_ERR(task);
         ctl_set_bit(14, 28);    /* enable channel report MCH */
         return 0;
 }