--- drivers/char/hvc_iucv.c

+++ drivers/char/hvc_iucv.c

@@ -139,6 +139,8 @@ struct hvc_iucv_private *hvc_iucv_get_pr

*

* 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

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_iuc

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;