diff options
Diffstat (limited to 'drivers/char/hvc_iucv.c')
| -rw-r--r-- | drivers/char/hvc_iucv.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/char/hvc_iucv.c b/drivers/char/hvc_iucv.c index fe62bd0e17b7..37b0542a4eeb 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; @@ -922,7 +924,7 @@ static int hvc_iucv_pm_restore_thaw(struct device *dev) /* HVC operations */ -static struct hv_ops hvc_iucv_ops = { +static const struct hv_ops hvc_iucv_ops = { .get_chars = hvc_iucv_get_chars, .put_chars = hvc_iucv_put_chars, .notifier_add = hvc_iucv_notifier_add, |