[S390] dasd: fix return code handling

Check return value of itcw_add_dcw() for error code and return it.

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

1 files changed, 1 insertions, 2 deletions

diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c
index 58209434c992..30fb979d684d 100644
--- a/drivers/s390/block/dasd_eckd.c
+++ b/drivers/s390/block/dasd_eckd.c
@@ -2552,8 +2552,7 @@ static int prepare_itcw(struct itcw *itcw,
 
         dcw = itcw_add_dcw(itcw, pfx_cmd, 0,
                      &pfxdata, sizeof(pfxdata), total_data_size);
-
-        return rc;
+        return IS_ERR(dcw) ? PTR_ERR(dcw) : 0;
 }
 
 static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track(