Commit 6f76592e authored by Peter Oberparleiter's avatar Peter Oberparleiter Committed by Alexander Gordeev
Browse files

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: default avatarVineeth Vijayan <vneethv@linux.ibm.com>
Signed-off-by: default avatarPeter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: default avatarAlexander Gordeev <agordeev@linux.ibm.com>
parent 2d8527f2

drivers/s390/cio/device_fsm.c

+5 −0
Original line number Diff line number Diff line
@@ -504,6 +504,11 @@ void ccw_device_verify_done(struct ccw_device *cdev, int err) 
		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;

drivers/s390/cio/device_ops.c

+8 −0
Original line number Diff line number Diff line
@@ -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. */