1 files changed, 19 insertions, 12 deletions

diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index 8373ca0de8e0..fb613d70c2cb 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -21,7 +21,6 @@
 #include <linux/hdreg.h>
 #include <linux/async.h>
 #include <linux/mutex.h>
-#include <linux/smp_lock.h>
 
 #include <asm/ccwdev.h>
 #include <asm/ebcdic.h>
@@ -1100,16 +1099,30 @@ void dasd_int_handler(struct ccw_device *cdev, unsigned long intparm,
 	cqr = (struct dasd_ccw_req *) intparm;
 	if (!cqr || ((scsw_cc(&irb->scsw) == 1) &&
 		     (scsw_fctl(&irb->scsw) & SCSW_FCTL_START_FUNC) &&
-		     (scsw_stctl(&irb->scsw) & SCSW_STCTL_STATUS_PEND))) {
+		     ((scsw_stctl(&irb->scsw) == SCSW_STCTL_STATUS_PEND) ||
+		      (scsw_stctl(&irb->scsw) == (SCSW_STCTL_STATUS_PEND |
+						  SCSW_STCTL_ALERT_STATUS))))) {
 		if (cqr && cqr->status == DASD_CQR_IN_IO)
 			cqr->status = DASD_CQR_QUEUED;
+		if (cqr)
+			memcpy(&cqr->irb, irb, sizeof(*irb));
 		device = dasd_device_from_cdev_locked(cdev);
-		if (!IS_ERR(device)) {
-			dasd_device_clear_timer(device);
-			device->discipline->handle_unsolicited_interrupt(device,
-									 irb);
+		if (IS_ERR(device))
+			return;
+		/* ignore unsolicited interrupts for DIAG discipline */
+		if (device->discipline == dasd_diag_discipline_pointer) {
 			dasd_put_device(device);
+			return;
 		}
+		device->discipline->dump_sense_dbf(device, irb,
+						   "unsolicited");
+		if ((device->features & DASD_FEATURE_ERPLOG))
+			device->discipline->dump_sense(device, cqr,
+						       irb);
+		dasd_device_clear_timer(device);
+		device->discipline->handle_unsolicited_interrupt(device,
+								 irb);
+		dasd_put_device(device);
 		return;
 	}
 
@@ -2197,7 +2210,6 @@ static void dasd_setup_queue(struct dasd_block *block)
 	 */
 	blk_queue_max_segment_size(block->request_queue, PAGE_SIZE);
 	blk_queue_segment_boundary(block->request_queue, PAGE_SIZE - 1);
-	blk_queue_ordered(block->request_queue, QUEUE_ORDERED_DRAIN);
 }
 
 /*
@@ -2236,7 +2248,6 @@ static int dasd_open(struct block_device *bdev, fmode_t mode)
 	if (!block)
 		return -ENODEV;
 
-	lock_kernel();
 	base = block->base;
 	atomic_inc(&block->open_count);
 	if (test_bit(DASD_FLAG_OFFLINE, &base->flags)) {
@@ -2271,14 +2282,12 @@ static int dasd_open(struct block_device *bdev, fmode_t mode)
 		goto out;
 	}
 
-	unlock_kernel();
 	return 0;
 
 out:
 	module_put(base->discipline->owner);
 unlock:
 	atomic_dec(&block->open_count);
-	unlock_kernel();
 	return rc;
 }
 
@@ -2286,10 +2295,8 @@ static int dasd_release(struct gendisk *disk, fmode_t mode)
 {
 	struct dasd_block *block = disk->private_data;
 
-	lock_kernel();
 	atomic_dec(&block->open_count);
 	module_put(block->base->discipline->owner);
-	unlock_kernel();
 	return 0;
 }