2 files changed, 37 insertions, 16 deletions

diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index 0570794ccf1c..d1815272c435 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -20,6 +20,7 @@
 #include <linux/slab.h>
 #include <linux/buffer_head.h>
 #include <linux/hdreg.h>
+#include <linux/async.h>
 
 #include <asm/ccwdev.h>
 #include <asm/ebcdic.h>
@@ -480,8 +481,10 @@ static void dasd_change_state(struct dasd_device *device)
         if (rc && rc != -EAGAIN)
                 device->target = device->state;
 
-        if (device->state == device->target)
+        if (device->state == device->target) {
                 wake_up(&dasd_init_waitq);
+                dasd_put_device(device);
+        }
 
         /* let user-space know that the device status changed */
         kobject_uevent(&device->cdev->dev.kobj, KOBJ_CHANGE);
@@ -513,12 +516,15 @@ void dasd_kick_device(struct dasd_device *device)
  */
 void dasd_set_target_state(struct dasd_device *device, int target)
 {
+        dasd_get_device(device);
         /* If we are in probeonly mode stop at DASD_STATE_READY. */
         if (dasd_probeonly && target > DASD_STATE_READY)
                 target = DASD_STATE_READY;
         if (device->target != target) {
-                if (device->state == target)
+                if (device->state == target) {
                         wake_up(&dasd_init_waitq);
+                        dasd_put_device(device);
+                }
                 device->target = target;
         }
         if (device->state != device->target)
@@ -2148,6 +2154,22 @@ dasd_exit(void)
  * SECTION: common functions for ccw_driver use
  */
 
+static void dasd_generic_auto_online(void *data, async_cookie_t cookie)
+{
+        struct ccw_device *cdev = data;
+        int ret;
+
+        ret = ccw_device_set_online(cdev);
+        if (ret)
+                pr_warning("%s: Setting the DASD online failed with rc=%d\n",
+                           dev_name(&cdev->dev), ret);
+        else {
+                struct dasd_device *device = dasd_device_from_cdev(cdev);
+                wait_event(dasd_init_waitq, _wait_for_device(device));
+                dasd_put_device(device);
+        }
+}
+
 /*
  * Initial attempt at a probe function. this can be simplified once
  * the other detection code is gone.
@@ -2180,10 +2202,7 @@ int dasd_generic_probe(struct ccw_device *cdev,
          */
         if ((dasd_get_feature(cdev, DASD_FEATURE_INITIAL_ONLINE) > 0 ) ||
             (dasd_autodetect && dasd_busid_known(dev_name(&cdev->dev)) != 0))
-                ret = ccw_device_set_online(cdev);
-        if (ret)
-                pr_warning("%s: Setting the DASD online failed with rc=%d\n",
-                       dev_name(&cdev->dev), ret);
+                async_schedule(dasd_generic_auto_online, cdev);
         return 0;
 }
 
@@ -2290,13 +2309,7 @@ int dasd_generic_set_online(struct ccw_device *cdev,
         } else
                 pr_debug("dasd_generic device %s found\n",
                                 dev_name(&cdev->dev));
-
-        /* FIXME: we have to wait for the root device but we don't want
-         * to wait for each single device but for all at once. */
-        wait_event(dasd_init_waitq, _wait_for_device(device));
-
         dasd_put_device(device);
-
         return rc;
 }
 
diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c
index 21254793c604..cb52da033f06 100644
--- a/drivers/s390/block/dasd_eckd.c
+++ b/drivers/s390/block/dasd_eckd.c
@@ -2019,15 +2019,23 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track(
                                 ccw++;
                                 recid += count;
                                 new_track = 0;
+                                /* first idaw for a ccw may start anywhere */
+                                if (!idaw_dst)
+                                        idaw_dst = dst;
                         }
-                        /* If we start a new idaw, everything is fine and the
-                         * start of the new idaw is the start of this segment.
+                        /* If we start a new idaw, we must make sure that it
+                         * starts on an IDA_BLOCK_SIZE boundary.
                          * If we continue an idaw, we must make sure that the
                          * current segment begins where the so far accumulated
                          * idaw ends
                          */
-                        if (!idaw_dst)
-                                idaw_dst = dst;
+                        if (!idaw_dst) {
+                                if (__pa(dst) & (IDA_BLOCK_SIZE-1)) {
+                                        dasd_sfree_request(cqr, startdev);
+                                        return ERR_PTR(-ERANGE);
+                                } else
+                                        idaw_dst = dst;
+                        }
                         if ((idaw_dst + idaw_len) != dst) {
                                 dasd_sfree_request(cqr, startdev);
                                 return ERR_PTR(-ERANGE);