4.14-stable review patch. If anyone has any objections, please let me know.
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From: Hans de Goede hdegoede@redhat.com
[ Upstream commit 7841d554809b518a22349e7e39b6b63f8a48d0fb ]
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 Signed-off-by: Sasha Levin alexander.levin@verizon.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/bluetooth/hci_ldisc.c | 7 +++++++ 1 file changed, 7 insertions(+)
--- a/drivers/bluetooth/hci_ldisc.c +++ b/drivers/bluetooth/hci_ldisc.c @@ -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 hc 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;