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authorStefan Haberland <stefan.haberland@de.ibm.com>2008-10-10 21:33:23 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2008-10-10 21:33:59 +0200
commitada3df9171e48b2a5f1e9c828337b61746e19ff0 (patch)
treedb172c9c47a2a0749202a3eef3176dcf10646f5d /drivers/s390
parent[S390] Move private simple udelay function to arch/s390/lib/delay.c. (diff)
downloadlinux-ada3df9171e48b2a5f1e9c828337b61746e19ff0.tar.xz
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.c25
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;
};