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Bluetooth: hci_uart_set_flow_control: Fix NULL deref when using serdev 

Fix a NULL pointer deref (hu->tty) when calling hci_uart_set_flow_control
on hci_uart-s using serdev.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Hans de Goede 2017-10-04 20:43:35 +02:00 committed by Marcel Holtmann
parent c0153b0b90
commit 7841d55480
1 changed files with 7 additions and 0 deletions
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7
drivers/bluetooth/hci_ldisc.c
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@ -41,6 +41,7 @@
#include <linux/ioctl.h>
#include <linux/skbuff.h>
#include <linux/firmware.h>
#include <linux/serdev.h>
#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
@ -298,6 +299,12 @@ void hci_uart_set_flow_control(struct hci_uart *hu, bool enable)
unsigned int set = 0;
unsigned int clear = 0;
if (hu->serdev) {
serdev_device_set_flow_control(hu->serdev, !enable);
serdev_device_set_rts(hu->serdev, !enable);
return;
}
if (enable) {
/* Disable hardware flow control */
ktermios = tty->termios;