s390/sclp: sign extend return value of _sclp_print_early()

_sclp_print_early() has a return value, but misses to sign extend it
if called from 64 bit code.
This is not really a bug, since currently no caller cares what the
return value is.

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

1 files changed, 2 insertions, 1 deletions

diff --git a/arch/s390/kernel/sclp.S b/arch/s390/kernel/sclp.S
index a41f2c99dcc8..7e77e03378f3 100644
--- a/arch/s390/kernel/sclp.S
+++ b/arch/s390/kernel/sclp.S
@@ -294,7 +294,8 @@ ENTRY(_sclp_print_early)
 #ifdef CONFIG_64BIT
         tm      LC_AR_MODE_ID,1
         jno     .Lesa3
-        lmh     %r6,%r15,96(%r15)               # store upper register halves
+        lgfr    %r2,%r2                         # sign extend return value
+        lmh     %r6,%r15,96(%r15)               # restore upper register halves
         ahi     %r15,80
 .Lesa3:
 #endif