dasd: fix unresponsive device during format

If path events occur the formatting process stucks because path
events may flush format requests from the queue.

Kick the format process after path events are handled.

Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index 5e8442c88e295396b02b46e5e8f0f117063ac585..9242d7cff9b51ac0055e7b0398356d2dff5d330a 100644 (file)
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -1675,8 +1675,11 @@ void dasd_int_handler(struct ccw_device *cdev, unsigned long intparm,
        if (cqr->status == DASD_CQR_CLEAR_PENDING &&
            scsw_fctl(&irb->scsw) & SCSW_FCTL_CLEAR_FUNC) {
                cqr->status = DASD_CQR_CLEARED;
+               if (cqr->callback_data == DASD_SLEEPON_START_TAG)
+                       cqr->callback_data = DASD_SLEEPON_END_TAG;
                dasd_device_clear_timer(device);
                wake_up(&dasd_flush_wq);
+               wake_up(&generic_waitq);
                dasd_schedule_device_bh(device);
                return;
        }
@@ -2439,6 +2442,8 @@ int dasd_cancel_req(struct dasd_ccw_req *cqr)
        case DASD_CQR_QUEUED:
                /* request was not started - just set to cleared */
                cqr->status = DASD_CQR_CLEARED;
+               if (cqr->callback_data == DASD_SLEEPON_START_TAG)
+                       cqr->callback_data = DASD_SLEEPON_END_TAG;
                break;
        case DASD_CQR_IN_IO:
                /* request in IO - terminate IO and release again */
@@ -3512,6 +3517,10 @@ int dasd_generic_path_operational(struct dasd_device *device)
        dasd_schedule_device_bh(device);
        if (device->block)
                dasd_schedule_block_bh(device->block);
+
+       if (!device->stopped)
+               wake_up(&generic_waitq);
+
        return 1;
 }
 EXPORT_SYMBOL_GPL(dasd_generic_path_operational);