[S390] vmwatchdog: fix broken inline assembly.

Constraint for err is wrong since it is preinitialized and the code
relies on it in case of an exception.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/s390/char/vmwatchdog.c b/drivers/s390/char/vmwatchdog.c
index 680b9b58b80e..6f40facb1c4d 100644
--- a/drivers/s390/char/vmwatchdog.c
+++ b/drivers/s390/char/vmwatchdog.c
@@ -66,8 +66,8 @@ static int __diag288(enum vmwdt_func func, unsigned int timeout,
                 "0:     la      %0,0\n"
                 "1:\n"
                 EX_TABLE(0b,1b)
-                : "=d" (err) : "d"(__func), "d"(__timeout),
-                  "d"(__cmdp), "d"(__cmdl), "0" (-EINVAL) : "1", "cc");
+                : "+d" (err) : "d"(__func), "d"(__timeout),
+                  "d"(__cmdp), "d"(__cmdl) : "1", "cc");
         return err;
 }