From 75240ac439eafde7e5b94107ece32b11a334d985 Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Tue, 29 Sep 2020 12:41:16 +0200 Subject: USB: serial: ftdi_sio: clean up jtag quirks Drivers should not assume that interface descriptors have been parsed in any particular order so match on interface number instead when rejecting JTAG interfaces. Also use the interface struct device for notifications so that the interface number is included. Reviewed-by: Greg Kroah-Hartman Signed-off-by: Johan Hovold --- drivers/usb/serial/ftdi_sio.c | 18 ++++++++---------- 1 file changed, 8 insertions(+), 10 deletions(-) (limited to 'drivers/usb/serial/ftdi_sio.c') diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c index 8d89a1650dad..12a4b74ca1f4 100644 --- a/drivers/usb/serial/ftdi_sio.c +++ b/drivers/usb/serial/ftdi_sio.c @@ -2335,12 +2335,11 @@ static int ftdi_NDI_device_setup(struct usb_serial *serial) */ static int ftdi_jtag_probe(struct usb_serial *serial) { - struct usb_device *udev = serial->dev; - struct usb_interface *interface = serial->interface; + struct usb_interface *intf = serial->interface; + int ifnum = intf->cur_altsetting->desc.bInterfaceNumber; - if (interface == udev->actconfig->interface[0]) { - dev_info(&udev->dev, - "Ignoring serial port reserved for JTAG\n"); + if (ifnum == 0) { + dev_info(&intf->dev, "Ignoring interface reserved for JTAG\n"); return -ENODEV; } @@ -2372,12 +2371,11 @@ static int ftdi_8u2232c_probe(struct usb_serial *serial) */ static int ftdi_stmclite_probe(struct usb_serial *serial) { - struct usb_device *udev = serial->dev; - struct usb_interface *interface = serial->interface; + struct usb_interface *intf = serial->interface; + int ifnum = intf->cur_altsetting->desc.bInterfaceNumber; - if (interface == udev->actconfig->interface[0] || - interface == udev->actconfig->interface[1]) { - dev_info(&udev->dev, "Ignoring serial port reserved for JTAG\n"); + if (ifnum < 2) { + dev_info(&intf->dev, "Ignoring interface reserved for JTAG\n"); return -ENODEV; } -- cgit v1.2.3-59-g8ed1b