s390/cio: log fake IRB events

Add traces when queueing and delivering fake IRBs. These are significant
events that might have an impact on device driver processing and are
therefore relevant for problem analysis.

Reviewed-by: Vineeth Vijayan <vneethv@linux.ibm.com>
Signed-off-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>

diff --git a/drivers/s390/cio/device_fsm.c b/drivers/s390/cio/device_fsm.c
index 65d8b2cfd6262d53a03bf10295d5d6c59f518c5d..42791fa0b80e26d4246dabc18e82f2130edb9bb9 100644 (file)
--- a/drivers/s390/cio/device_fsm.c
+++ b/drivers/s390/cio/device_fsm.c
@@ -504,6 +504,11 @@ callback:
                ccw_device_done(cdev, DEV_STATE_ONLINE);
                /* Deliver fake irb to device driver, if needed. */
                if (cdev->private->flags.fake_irb) {
+                       CIO_MSG_EVENT(2, "fakeirb: deliver device 0.%x.%04x intparm %lx type=%d\n",
+                                     cdev->private->dev_id.ssid,
+                                     cdev->private->dev_id.devno,
+                                     cdev->private->intparm,
+                                     cdev->private->flags.fake_irb);
                        create_fake_irb(&cdev->private->dma_area->irb,
                                        cdev->private->flags.fake_irb);
                        cdev->private->flags.fake_irb = 0;

diff --git a/drivers/s390/cio/device_ops.c b/drivers/s390/cio/device_ops.c
index 40c97f8730751f2afa862ace30b16f1ade38ea80..acd6790dba4dd1311d78e05afa0f41ad5b38aa3a 100644 (file)
--- a/drivers/s390/cio/device_ops.c
+++ b/drivers/s390/cio/device_ops.c
@@ -208,6 +208,10 @@ int ccw_device_start_timeout_key(struct ccw_device *cdev, struct ccw1 *cpa,
                if (!cdev->private->flags.fake_irb) {
                        cdev->private->flags.fake_irb = FAKE_CMD_IRB;
                        cdev->private->intparm = intparm;
+                       CIO_MSG_EVENT(2, "fakeirb: queue device 0.%x.%04x intparm %lx type=%d\n",
+                                     cdev->private->dev_id.ssid,
+                                     cdev->private->dev_id.devno, intparm,
+                                     cdev->private->flags.fake_irb);
                        return 0;
                } else
                        /* There's already a fake I/O around. */
@@ -551,6 +555,10 @@ int ccw_device_tm_start_timeout_key(struct ccw_device *cdev, struct tcw *tcw,
                if (!cdev->private->flags.fake_irb) {
                        cdev->private->flags.fake_irb = FAKE_TM_IRB;
                        cdev->private->intparm = intparm;
+                       CIO_MSG_EVENT(2, "fakeirb: queue device 0.%x.%04x intparm %lx type=%d\n",
+                                     cdev->private->dev_id.ssid,
+                                     cdev->private->dev_id.devno, intparm,
+                                     cdev->private->flags.fake_irb);
                        return 0;
                } else
                        /* There's already a fake I/O around. */