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path: root/drivers/s390/char/raw3270.c
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Diffstat (limited to 'drivers/s390/char/raw3270.c')
-rw-r--r--drivers/s390/char/raw3270.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/s390/char/raw3270.c b/drivers/s390/char/raw3270.c
index 37173cb0f5f5..c57694be9bd3 100644
--- a/drivers/s390/char/raw3270.c
+++ b/drivers/s390/char/raw3270.c
@@ -162,7 +162,8 @@ struct raw3270_request *raw3270_request_alloc(size_t size)
/*
* Setup ccw.
*/
- rq->ccw.cda = virt_to_dma32(rq->buffer);
+ if (rq->buffer)
+ rq->ccw.cda = virt_to_dma32(rq->buffer);
rq->ccw.flags = CCW_FLAG_SLI;
return rq;
@@ -188,7 +189,8 @@ int raw3270_request_reset(struct raw3270_request *rq)
return -EBUSY;
rq->ccw.cmd_code = 0;
rq->ccw.count = 0;
- rq->ccw.cda = virt_to_dma32(rq->buffer);
+ if (rq->buffer)
+ rq->ccw.cda = virt_to_dma32(rq->buffer);
rq->ccw.flags = CCW_FLAG_SLI;
rq->rescnt = 0;
rq->rc = 0;