From: David Lechner <david@lechnology.com>
Date: Fri, 8 Dec 2017 02:22:19 +0000 (-0600)
Subject: Bluetooth: hci_ll: Add endianness conversion when setting baudrate
X-Git-Tag: for-linus-20180210~31^2~331^2~10
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=c30b93eade2ad1d77695669f25ddeb3833588d3b;p=linux-block.git

Bluetooth: hci_ll: Add endianness conversion when setting baudrate

This adds an endianness conversion when setting the baudrate using a
vendor-specific command. Otherwise, bad things might happen on a big-
endian system.

Suggested-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: David Lechner <david@lechnology.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
---

diff --git a/drivers/bluetooth/hci_ll.c b/drivers/bluetooth/hci_ll.c
index 974a78879d20..efcfbe9aac21 100644
--- a/drivers/bluetooth/hci_ll.c
+++ b/drivers/bluetooth/hci_ll.c
@@ -707,10 +707,12 @@ static int ll_setup(struct hci_uart *hu)
 		speed = 0;
 
 	if (speed) {
+		__le32 speed_le = cpu_to_le32(speed);
 		struct sk_buff *skb;
 
 		skb = __hci_cmd_sync(hu->hdev, HCI_VS_UPDATE_UART_HCI_BAUDRATE,
-				     sizeof(speed), &speed, HCI_INIT_TIMEOUT);
+				     sizeof(speed_le), &speed_le,
+				     HCI_INIT_TIMEOUT);
 		if (!IS_ERR(skb)) {
 			kfree_skb(skb);
 			serdev_device_set_baudrate(serdev, speed);