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authorStefan Haberland <stefan.haberland@de.ibm.com>2010-05-27 01:27:09 +0400
committerMartin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com>2010-05-27 01:27:09 +0400
commita23ed009a726feeafdbabeaf5f0bde1a3f04d121 (patch)
treecd2448ca9544f23acacc40e5ab2b95b4636ef923 /drivers/s390
parent094f2100d6bb16ef0c4f82167cc55173ca22ee93 (diff)
downloadlinux-a23ed009a726feeafdbabeaf5f0bde1a3f04d121.tar.xz
[S390] dasd: unit check handling during internal cio I/O
React on unit checks during cio internal I/O. Handle as unsolicited interrupt and advice cio to retry. 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.c23
-rw-r--r--drivers/s390/block/dasd_eckd.c1
-rw-r--r--drivers/s390/block/dasd_int.h1
3 files changed, 25 insertions, 0 deletions
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index 0e86247d791e..33975e922d65 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -1186,6 +1186,29 @@ void dasd_int_handler(struct ccw_device *cdev, unsigned long intparm,
dasd_schedule_device_bh(device);
}
+enum uc_todo dasd_generic_uc_handler(struct ccw_device *cdev, struct irb *irb)
+{
+ struct dasd_device *device;
+
+ device = dasd_device_from_cdev_locked(cdev);
+
+ if (IS_ERR(device))
+ goto out;
+ if (test_bit(DASD_FLAG_OFFLINE, &device->flags) ||
+ device->state != device->target ||
+ !device->discipline->handle_unsolicited_interrupt){
+ dasd_put_device(device);
+ goto out;
+ }
+
+ dasd_device_clear_timer(device);
+ device->discipline->handle_unsolicited_interrupt(device, irb);
+ dasd_put_device(device);
+out:
+ return UC_TODO_RETRY;
+}
+EXPORT_SYMBOL_GPL(dasd_generic_uc_handler);
+
/*
* If we have an error on a dasd_block layer request then we cancel
* and return all further requests from the same dasd_block as well.
diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c
index 5b1cd8d6e971..ab84da5592e8 100644
--- a/drivers/s390/block/dasd_eckd.c
+++ b/drivers/s390/block/dasd_eckd.c
@@ -3436,6 +3436,7 @@ static struct ccw_driver dasd_eckd_driver = {
.freeze = dasd_generic_pm_freeze,
.thaw = dasd_generic_restore_device,
.restore = dasd_generic_restore_device,
+ .uc_handler = dasd_generic_uc_handler,
};
/*
diff --git a/drivers/s390/block/dasd_int.h b/drivers/s390/block/dasd_int.h
index 32fac186ba3f..49b431d135e0 100644
--- a/drivers/s390/block/dasd_int.h
+++ b/drivers/s390/block/dasd_int.h
@@ -617,6 +617,7 @@ int dasd_generic_notify(struct ccw_device *, int);
void dasd_generic_handle_state_change(struct dasd_device *);
int dasd_generic_pm_freeze(struct ccw_device *);
int dasd_generic_restore_device(struct ccw_device *);
+enum uc_todo dasd_generic_uc_handler(struct ccw_device *, struct irb *);
int dasd_generic_read_dev_chars(struct dasd_device *, int, void *, int);
char *dasd_get_sense(struct irb *);