[S390] fix mismatch in summation of I/O IRQ statistics
Current IRQ statistics support does not show detail counts for I/O
interrupts which are processed internally only. The result is a
summation count which is way off such as this one:
CPU0 CPU1 CPU2
I/O: 1331 710 442
[...]
QAI: 15 16 16 [I/O] QDIO Adapter Interrupt
QDI: 1 0 0 [I/O] QDIO Interrupt
DAS: 706 645 381 [I/O] DASD
C15: 26 10 0 [I/O] 3215
C70: 0 0 0 [I/O] 3270
TAP: 0 0 0 [I/O] Tape
VMR: 0 0 0 [I/O] Unit Record Devices
LCS: 0 0 0 [I/O] LCS
CLW: 0 0 0 [I/O] CLAW
CTC: 0 0 0 [I/O] CTC
APB: 0 0 0 [I/O] AP Bus
Fix this by moving I/O interrupt accounting into the common I/O layer.
Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/drivers/s390/cio/device.h b/drivers/s390/cio/device.h
index 0b7245c..179824b 100644
--- a/drivers/s390/cio/device.h
+++ b/drivers/s390/cio/device.h
@@ -5,6 +5,7 @@
#include <linux/atomic.h>
#include <linux/wait.h>
#include <linux/notifier.h>
+#include <linux/kernel_stat.h>
#include "io_sch.h"
/*
@@ -56,7 +57,17 @@
static inline void
dev_fsm_event(struct ccw_device *cdev, enum dev_event dev_event)
{
- dev_jumptable[cdev->private->state][dev_event](cdev, dev_event);
+ int state = cdev->private->state;
+
+ if (dev_event == DEV_EVENT_INTERRUPT) {
+ if (state == DEV_STATE_ONLINE)
+ kstat_cpu(smp_processor_id()).
+ irqs[cdev->private->int_class]++;
+ else if (state != DEV_STATE_CMFCHANGE &&
+ state != DEV_STATE_CMFUPDATE)
+ kstat_cpu(smp_processor_id()).irqs[IOINT_CIO]++;
+ }
+ dev_jumptable[state][dev_event](cdev, dev_event);
}
/*