1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/char/hvc_iucv.c b/drivers/char/hvc_iucv.c
index 21681a81cc3..37b0542a4ee 100644
--- a/drivers/char/hvc_iucv.c
+++ b/drivers/char/hvc_iucv.c
@@ -139,6 +139,8 @@ struct hvc_iucv_private *hvc_iucv_get_private(uint32_t num)
  *
  * This function allocates a new struct iucv_tty_buffer element and, optionally,
  * allocates an internal data buffer with the specified size @size.
+ * The internal data buffer is always allocated with GFP_DMA which is
+ * required for receiving and sending data with IUCV.
  * Note: The total message size arises from the internal buffer size and the
  *       members of the iucv_tty_msg structure.
  * The function returns NULL if memory allocation has failed.
@@ -154,7 +156,7 @@ static struct iucv_tty_buffer *alloc_tty_buffer(size_t size, gfp_t flags)
 
         if (size > 0) {
                 bufp->msg.length = MSG_SIZE(size);
-                bufp->mbuf = kmalloc(bufp->msg.length, flags);
+                bufp->mbuf = kmalloc(bufp->msg.length, flags | GFP_DMA);
                 if (!bufp->mbuf) {
                         mempool_free(bufp, hvc_iucv_mempool);
                         return NULL;
@@ -237,7 +239,7 @@ static int hvc_iucv_write(struct hvc_iucv_private *priv,
         if (!rb->mbuf) { /* message not yet received ... */
                 /* allocate mem to store msg data; if no memory is available
                  * then leave the buffer on the list and re-try later */
-                rb->mbuf = kmalloc(rb->msg.length, GFP_ATOMIC);
+                rb->mbuf = kmalloc(rb->msg.length, GFP_ATOMIC | GFP_DMA);
                 if (!rb->mbuf)
                         return -ENOMEM;