[S390] sparse: fix sparse NULL pointer warnings

Fix two NULL pointer warnings in the dasd driver:

drivers/s390/block/dasd_eckd.c:2353:20: warning: Using plain integer as NULL pointer
drivers/s390/block/dasd_eckd.c:2415:44: warning: Using plain integer as NULL pointer

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c
index cca25096efce..6ab29680586a 100644
--- a/drivers/s390/block/dasd_eckd.c
+++ b/drivers/s390/block/dasd_eckd.c
@@ -2386,7 +2386,7 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track(
         new_track = 1;
         end_idaw = 0;
         len_to_track_end = 0;
-        idaw_dst = 0;
+        idaw_dst = NULL;
         idaw_len = 0;
         rq_for_each_segment(bv, req, iter) {
                 dst = page_address(bv->bv_page) + bv->bv_offset;
@@ -2448,7 +2448,7 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track(
                         if (end_idaw) {
                                 idaws = idal_create_words(idaws, idaw_dst,
                                                           idaw_len);
-                                idaw_dst = 0;
+                                idaw_dst = NULL;
                                 idaw_len = 0;
                                 end_idaw = 0;
                         }