[S390] cio: handle ssch() return codes correctly.

ssch() has two classes of return codes:
- condition codes (0-3) which need to be translated to Linux
  error codes
- Linux error codes (-EIO on exceptions) which should be passed
  to the caller (instead of erronously being handled like
  condition code 3)

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

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/s390/cio/cio.c b/drivers/s390/cio/cio.c
index 33bff8fec7d1..5954b905e3ca 100644
--- a/drivers/s390/cio/cio.c
+++ b/drivers/s390/cio/cio.c
@@ -208,8 +208,10 @@ cio_start_key (struct subchannel *sch,	/* subchannel structure */
         case 1:         /* status pending */
         case 2:         /* busy */
                 return -EBUSY;
-        default:                /* device/path not operational */
+        case 3:         /* device/path not operational */
                 return cio_start_handle_notoper(sch, lpm);
+        default:
+                return ccode;
         }
 }