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Commit ada3df91 authored by Stefan Haberland's avatar Stefan Haberland Committed by Martin Schwidefsky
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[S390] dasd: fix message flood for unsolicited interrupts 



In the unsolicited interupt handler fake IRBs from CIO have to be
ignored because there is nothing to do.
The function dump_sense should not be called if there is no sense
data available.

Signed-off-by: default avatarStefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 5a0d0e65

drivers/s390/block/dasd_eckd.c

+20 −5
Original line number Diff line number Diff line
@@ -1501,12 +1501,27 @@ static void dasd_eckd_handle_unsolicited_interrupt(struct dasd_device *device, 
		return;

	}



	if ((irb->scsw.cmd.cc == 1) &&

	    (irb->scsw.cmd.fctl & SCSW_FCTL_START_FUNC) &&

	    (irb->scsw.cmd.actl & SCSW_ACTL_START_PEND) &&

	    (irb->scsw.cmd.stctl & SCSW_STCTL_STATUS_PEND)) {

		/* fake irb do nothing, they are handled elsewhere */

		dasd_schedule_device_bh(device);

		return;

	}



	if (!(irb->esw.esw0.erw.cons)) {

		/* just report other unsolicited interrupts */

	DEV_MESSAGE(KERN_DEBUG, device, "%s",

		DEV_MESSAGE(KERN_ERR, device, "%s",

			    "unsolicited interrupt received");

	} else {

		DEV_MESSAGE(KERN_ERR, device, "%s",

			    "unsolicited interrupt received "

			    "(sense available)");

		device->discipline->dump_sense(device, NULL, irb);

	dasd_schedule_device_bh(device);

	}



	dasd_schedule_device_bh(device);

	return;

};