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[S390] dasd: fix message flood for unsolicited interrupts

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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: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Stefan Haberland 2008-10-10 21:33:23 +02:00 committed by Martin Schwidefsky
parent 5a0d0e6537
commit ada3df9171
1 changed files with 20 additions and 5 deletions
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25
drivers/s390/block/dasd_eckd.c
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@ -1501,12 +1501,27 @@ static void dasd_eckd_handle_unsolicited_interrupt(struct dasd_device *device,
return;
}
/* just report other unsolicited interrupts */
DEV_MESSAGE(KERN_DEBUG, device, "%s",
"unsolicited interrupt received");
device->discipline->dump_sense(device, NULL, irb);
dasd_schedule_device_bh(device);
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_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);
return;
};