[S390] dasd: Improve handling of stolen DASD reservation
If a DASD device has been reserved by a Linux system, and later
this reservation is ‘stolen’ by a second system by means of an
unconditional reserve, then the first system receives a
notification about this fact. With this patch such an event can
be either ignored, as before, or it can be used to let the device
fail all I/O request, so that the device will not block anymore.
Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/drivers/s390/block/dasd_fba.c b/drivers/s390/block/dasd_fba.c
index 86bacda..be89b3a 100644
--- a/drivers/s390/block/dasd_fba.c
+++ b/drivers/s390/block/dasd_fba.c
@@ -233,24 +233,16 @@
return NULL;
}
-static void dasd_fba_handle_unsolicited_interrupt(struct dasd_device *device,
- struct irb *irb)
+static void dasd_fba_check_for_device_change(struct dasd_device *device,
+ struct dasd_ccw_req *cqr,
+ struct irb *irb)
{
char mask;
/* first of all check for state change pending interrupt */
mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP;
- if ((irb->scsw.cmd.dstat & mask) == mask) {
+ if ((irb->scsw.cmd.dstat & mask) == mask)
dasd_generic_handle_state_change(device);
- return;
- }
-
- /* check for unsolicited interrupts */
- DBF_DEV_EVENT(DBF_WARNING, device, "%s",
- "unsolicited interrupt received");
- device->discipline->dump_sense_dbf(device, irb, "unsolicited");
- dasd_schedule_device_bh(device);
- return;
};
static struct dasd_ccw_req *dasd_fba_build_cp(struct dasd_device * memdev,
@@ -605,7 +597,7 @@
.handle_terminated_request = dasd_fba_handle_terminated_request,
.erp_action = dasd_fba_erp_action,
.erp_postaction = dasd_fba_erp_postaction,
- .handle_unsolicited_interrupt = dasd_fba_handle_unsolicited_interrupt,
+ .check_for_device_change = dasd_fba_check_for_device_change,
.build_cp = dasd_fba_build_cp,
.free_cp = dasd_fba_free_cp,
.dump_sense = dasd_fba_dump_sense,