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i2c: tiny-usb: check usb base class before assuming the interface on device is for this driver

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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 <harry.geyer@devtank.co.uk>
Reviewed-by: Andi Shyti <andi.shyti@kernel.org>
Link: https://lore.kernel.org/r/20230727162255.21551-1-harry.geyer@devtank.co.uk
Signed-off-by: Wolfram Sang <wsa@kernel.org>
This commit is contained in:
Harry Geyer 2023-07-27 17:22:55 +01:00 committed by Wolfram Sang
parent 2ccdd1b13c
commit 3253f6923a
1 changed files with 4 additions and 0 deletions
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4
drivers/i2c/busses/i2c-tiny-usb.c
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@ -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 */