4 files changed, 9 insertions, 6 deletions

diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index 1b6c52ef7339..acb78017e7d0 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -2333,13 +2333,11 @@ int dasd_generic_notify(struct ccw_device *cdev, int event)
 {
         struct dasd_device *device;
         struct dasd_ccw_req *cqr;
-        unsigned long flags;
         int ret;
 
-        device = dasd_device_from_cdev(cdev);
+        device = dasd_device_from_cdev_locked(cdev);
         if (IS_ERR(device))
                 return 0;
-        spin_lock_irqsave(get_ccwdev_lock(cdev), flags);
         ret = 0;
         switch (event) {
         case CIO_GONE:
@@ -2369,7 +2367,6 @@ int dasd_generic_notify(struct ccw_device *cdev, int event)
                 ret = 1;
                 break;
         }
-        spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
         dasd_put_device(device);
         return ret;
 }
diff --git a/drivers/s390/block/dasd_eckd.h b/drivers/s390/block/dasd_eckd.h
index 4bf0aa5112c1..2476f87d21d0 100644
--- a/drivers/s390/block/dasd_eckd.h
+++ b/drivers/s390/block/dasd_eckd.h
@@ -308,7 +308,7 @@ struct dasd_psf_prssd_data {
         unsigned char flags;
         unsigned char reserved[4];
         unsigned char suborder;
-        unsigned char varies[9];
+        unsigned char varies[5];
 } __attribute__ ((packed));
 
 /*
diff --git a/drivers/s390/block/dasd_eer.c b/drivers/s390/block/dasd_eer.c
index 29da4413ad43..bf512ac75b9e 100644
--- a/drivers/s390/block/dasd_eer.c
+++ b/drivers/s390/block/dasd_eer.c
@@ -16,6 +16,7 @@
 #include <linux/poll.h>
 #include <linux/mutex.h>
 #include <linux/smp_lock.h>
+#include <linux/err.h>
 
 #include <asm/uaccess.h>
 #include <asm/atomic.h>
@@ -457,7 +458,7 @@ int dasd_eer_enable(struct dasd_device *device)
 
         cqr = dasd_kmalloc_request("ECKD", 1 /* SNSS */,
                                    SNSS_DATA_SIZE, device);
-        if (!cqr)
+        if (IS_ERR(cqr))
                 return -ENOMEM;
 
         cqr->startdev = device;
diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c
index 01fcdd91b846..711b3004b3e6 100644
--- a/drivers/s390/block/dcssblk.c
+++ b/drivers/s390/block/dcssblk.c
@@ -384,6 +384,11 @@ dcssblk_add_store(struct device *dev, struct device_attribute *attr, const char
          * get minor, add to list
          */
         down_write(&dcssblk_devices_sem);
+        if (dcssblk_get_device_by_name(local_buf)) {
+                up_write(&dcssblk_devices_sem);
+                rc = -EEXIST;
+                goto unload_seg;
+        }
         rc = dcssblk_assign_free_minor(dev_info);
         if (rc) {
                 up_write(&dcssblk_devices_sem);