Merge Linus master into drm-next

The merge is clean, but the arm build fails afterwards,
due to API changes in the regulator tree.

I've included the patch into the merge to fix the build.

Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 113 insertions, 19 deletions

diff --git a/drivers/bluetooth/hci_h4.c b/drivers/bluetooth/hci_h4.c
index 66db9a803373..f7190f01e135 100644
--- a/drivers/bluetooth/hci_h4.c
+++ b/drivers/bluetooth/hci_h4.c
@@ -40,17 +40,14 @@
 #include <linux/signal.h>
 #include <linux/ioctl.h>
 #include <linux/skbuff.h>
+#include <asm/unaligned.h>
 
 #include <net/bluetooth/bluetooth.h>
 #include <net/bluetooth/hci_core.h>
 
 #include "hci_uart.h"
 
-#define VERSION "1.2"
-
 struct h4_struct {
-	unsigned long rx_state;
-	unsigned long rx_count;
 	struct sk_buff *rx_skb;
 	struct sk_buff_head txq;
 };
@@ -117,18 +114,26 @@ static int h4_enqueue(struct hci_uart *hu, struct sk_buff *skb)
 	return 0;
 }
 
+static const struct h4_recv_pkt h4_recv_pkts[] = {
+	{ H4_RECV_ACL,   .recv = hci_recv_frame },
+	{ H4_RECV_SCO,   .recv = hci_recv_frame },
+	{ H4_RECV_EVENT, .recv = hci_recv_frame },
+};
+
 /* Recv data */
-static int h4_recv(struct hci_uart *hu, void *data, int count)
+static int h4_recv(struct hci_uart *hu, const void *data, int count)
 {
-	int ret;
+	struct h4_struct *h4 = hu->priv;
 
 	if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
 		return -EUNATCH;
 
-	ret = hci_recv_stream_fragment(hu->hdev, data, count);
-	if (ret < 0) {
-		BT_ERR("Frame Reassembly Failed");
-		return ret;
+	h4->rx_skb = h4_recv_buf(hu->hdev, h4->rx_skb, data, count,
+				 h4_recv_pkts, ARRAY_SIZE(h4_recv_pkts));
+	if (IS_ERR(h4->rx_skb)) {
+		int err = PTR_ERR(h4->rx_skb);
+		BT_ERR("%s: Frame reassembly failed (%d)", hu->hdev->name, err);
+		return err;
 	}
 
 	return count;
@@ -140,8 +145,9 @@ static struct sk_buff *h4_dequeue(struct hci_uart *hu)
 	return skb_dequeue(&h4->txq);
 }
 
-static struct hci_uart_proto h4p = {
+static const struct hci_uart_proto h4p = {
 	.id		= HCI_UART_H4,
+	.name		= "H4",
 	.open		= h4_open,
 	.close		= h4_close,
 	.recv		= h4_recv,
@@ -152,17 +158,105 @@ static struct hci_uart_proto h4p = {
 
 int __init h4_init(void)
 {
-	int err = hci_uart_register_proto(&h4p);
-
-	if (!err)
-		BT_INFO("HCI H4 protocol initialized");
-	else
-		BT_ERR("HCI H4 protocol registration failed");
-
-	return err;
+	return hci_uart_register_proto(&h4p);
 }
 
 int __exit h4_deinit(void)
 {
 	return hci_uart_unregister_proto(&h4p);
 }
+
+struct sk_buff *h4_recv_buf(struct hci_dev *hdev, struct sk_buff *skb,
+			    const unsigned char *buffer, int count,
+			    const struct h4_recv_pkt *pkts, int pkts_count)
+{
+	while (count) {
+		int i, len;
+
+		if (!skb) {
+			for (i = 0; i < pkts_count; i++) {
+				if (buffer[0] != (&pkts[i])->type)
+					continue;
+
+				skb = bt_skb_alloc((&pkts[i])->maxlen,
+						   GFP_ATOMIC);
+				if (!skb)
+					return ERR_PTR(-ENOMEM);
+
+				bt_cb(skb)->pkt_type = (&pkts[i])->type;
+				bt_cb(skb)->expect = (&pkts[i])->hlen;
+				break;
+			}
+
+			/* Check for invalid packet type */
+			if (!skb)
+				return ERR_PTR(-EILSEQ);
+
+			count -= 1;
+			buffer += 1;
+		}
+
+		len = min_t(uint, bt_cb(skb)->expect - skb->len, count);
+		memcpy(skb_put(skb, len), buffer, len);
+
+		count -= len;
+		buffer += len;
+
+		/* Check for partial packet */
+		if (skb->len < bt_cb(skb)->expect)
+			continue;
+
+		for (i = 0; i < pkts_count; i++) {
+			if (bt_cb(skb)->pkt_type == (&pkts[i])->type)
+				break;
+		}
+
+		if (i >= pkts_count) {
+			kfree_skb(skb);
+			return ERR_PTR(-EILSEQ);
+		}
+
+		if (skb->len == (&pkts[i])->hlen) {
+			u16 dlen;
+
+			switch ((&pkts[i])->lsize) {
+			case 0:
+				/* No variable data length */
+				(&pkts[i])->recv(hdev, skb);
+				skb = NULL;
+				break;
+			case 1:
+				/* Single octet variable length */
+				dlen = skb->data[(&pkts[i])->loff];
+				bt_cb(skb)->expect += dlen;
+
+				if (skb_tailroom(skb) < dlen) {
+					kfree_skb(skb);
+					return ERR_PTR(-EMSGSIZE);
+				}
+				break;
+			case 2:
+				/* Double octet variable length */
+				dlen = get_unaligned_le16(skb->data +
+							  (&pkts[i])->loff);
+				bt_cb(skb)->expect += dlen;
+
+				if (skb_tailroom(skb) < dlen) {
+					kfree_skb(skb);
+					return ERR_PTR(-EMSGSIZE);
+				}
+				break;
+			default:
+				/* Unsupported variable length */
+				kfree_skb(skb);
+				return ERR_PTR(-EILSEQ);
+			}
+		} else {
+			/* Complete frame */
+			(&pkts[i])->recv(hdev, skb);
+			skb = NULL;
+		}
+	}
+
+	return skb;
+}