[S390] tape: fix dbf usage

Get rid of the format string "%s" usage with volatile strings
to prevent use after free errors in the s390dbf.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

2 files changed, 6 insertions, 7 deletions

diff --git a/drivers/s390/char/tape_core.c b/drivers/s390/char/tape_core.c
index 29c2d73d719d..6c408670e08d 100644
--- a/drivers/s390/char/tape_core.c
+++ b/drivers/s390/char/tape_core.c
@@ -1077,15 +1077,14 @@ __tape_do_irq (struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
                 /* FIXME: What to do with the request? */
                 switch (PTR_ERR(irb)) {
                         case -ETIMEDOUT:
-                                DBF_LH(1, "(%s): Request timed out\n",
-                                        dev_name(&cdev->dev));
+                                DBF_LH(1, "(%08x): Request timed out\n",
+                                       device->cdev_id);
                         case -EIO:
                                 __tape_end_request(device, request, -EIO);
                                 break;
                         default:
-                                DBF_LH(1, "(%s): Unexpected i/o error %li\n",
-                                        dev_name(&cdev->dev),
-                                        PTR_ERR(irb));
+                                DBF_LH(1, "(%08x): Unexpected i/o error %li\n",
+                                       device->cdev_id, PTR_ERR(irb));
                 }
                 return;
         }
diff --git a/drivers/s390/char/tape_std.c b/drivers/s390/char/tape_std.c
index 03f07e5dd6e9..3c3f342149ec 100644
--- a/drivers/s390/char/tape_std.c
+++ b/drivers/s390/char/tape_std.c
@@ -47,8 +47,8 @@ tape_std_assign_timeout(unsigned long data)
                         device->cdev_id);
         rc = tape_cancel_io(device, request);
         if(rc)
-                DBF_EVENT(3, "(%s): Assign timeout: Cancel failed with rc = %i\n",
-                        dev_name(&device->cdev->dev), rc);
+                DBF_EVENT(3, "(%08x): Assign timeout: Cancel failed with rc = "
+                          "%i\n", device->cdev_id, rc);
 }
 
 int