Input: aiptek - use descriptors of current altsetting

Make sure to always use the descriptors of the current alternate setting
to avoid future issues when accessing fields that may differ between
settings.

Signed-off-by: Johan Hovold <johan@kernel.org>
Acked-by: Vladis Dronov <vdronov@redhat.com>
Link: https://lore.kernel.org/r/20191210113737.4016-4-johan@kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

diff --git a/drivers/input/tablet/aiptek.c b/drivers/input/tablet/aiptek.c
index 06d0ffe..e08b0ef 100644 (file)
--- a/drivers/input/tablet/aiptek.c
+++ b/drivers/input/tablet/aiptek.c
@@ -1713,7 +1713,7 @@ aiptek_probe(struct usb_interface *intf, const struct usb_device_id *id)
 
        aiptek->inputdev = inputdev;
        aiptek->intf = intf;
-       aiptek->ifnum = intf->altsetting[0].desc.bInterfaceNumber;
+       aiptek->ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
        aiptek->inDelay = 0;
        aiptek->endDelay = 0;
        aiptek->previousJitterable = 0;