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| author | Stefan Haberland <stefan.haberland@de.ibm.com> | 2008-10-10 21:33:23 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2008-10-10 21:33:59 +0200 |
| commit | ada3df9171e48b2a5f1e9c828337b61746e19ff0 (patch) | |
| tree | db172c9c47a2a0749202a3eef3176dcf10646f5d /drivers/s390 | |
| parent | 5a0d0e65379256b4da2c9092e197a2c761f51c01 (diff) | |
| download | linux-ada3df9171e48b2a5f1e9c828337b61746e19ff0.tar.gz linux-ada3df9171e48b2a5f1e9c828337b61746e19ff0.tar.bz2 linux-ada3df9171e48b2a5f1e9c828337b61746e19ff0.zip | |
[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: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390')
| -rw-r--r-- | drivers/s390/block/dasd_eckd.c | 25 |
1 files changed, 20 insertions, 5 deletions
diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c index 72d3970f11a4..8095629bc493 100644 --- a/drivers/s390/block/dasd_eckd.c +++ b/drivers/s390/block/dasd_eckd.c @@ -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; }; |