From 3253f6923a7825e301e05130afede82dde62acc9 Mon Sep 17 00:00:00 2001 From: Harry Geyer Date: Thu, 27 Jul 2023 17:22:55 +0100 Subject: [PATCH] i2c: tiny-usb: check usb base class before assuming the interface on device is for this driver Patch allows usb devices with multiple interfaces to use this driver without this driver assuming all interfaces are i2c-tiny-usb. Signed-off-by: Harry Geyer Reviewed-by: Andi Shyti Link: https://lore.kernel.org/r/20230727162255.21551-1-harry.geyer@devtank.co.uk Signed-off-by: Wolfram Sang --- drivers/i2c/busses/i2c-tiny-usb.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/i2c/busses/i2c-tiny-usb.c b/drivers/i2c/busses/i2c-tiny-usb.c index d1fa9ff5aeab..1bffe36c40ad 100644 --- a/drivers/i2c/busses/i2c-tiny-usb.c +++ b/drivers/i2c/busses/i2c-tiny-usb.c @@ -222,6 +222,10 @@ static int i2c_tiny_usb_probe(struct usb_interface *interface, int retval = -ENOMEM; u16 version; + if (interface->intf_assoc && + interface->intf_assoc->bFunctionClass != USB_CLASS_VENDOR_SPEC) + return -ENODEV; + dev_dbg(&interface->dev, "probing usb device\n"); /* allocate memory for our device state and initialize it */ -- 2.11.0