[S390] cio: fix orb initialization in cio_start_key

The functions cio_tm_start_key and cio_start_key use the same private
orb structure of a subchannel, so the orb needs to be cleared of old
data before it is used again. A respective memset is missing from
cio_start_key and hereby added.

Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/s390/cio/cio.c b/drivers/s390/cio/cio.c
index 5954b905e3c..326f4cc7f92 100644
--- a/drivers/s390/cio/cio.c
+++ b/drivers/s390/cio/cio.c
@@ -174,6 +174,7 @@ cio_start_key (struct subchannel *sch,	/* subchannel structure */
         CIO_TRACE_EVENT(4, sch->dev.bus_id);
 
         orb = &to_io_private(sch)->orb;
+        memset(orb, 0, sizeof(union orb));
         /* sch is always under 2G. */
         orb->cmd.intparm = (u32)(addr_t)sch;
         orb->cmd.fmt = 1;