usb: serial: option: add HP LT4220 support

[Johan Hovold <johan@kernel.org>]

On Wed, Apr 11, 2018 at 02:36:52PM +0800, Edward Chang wrote:
> This patch adds support for HP LT4220
> 
> Signed-off-by: Edward Chang <edward.chang.mcs@gmail.com>
> ---

Thanks for the update. Please always include a changelog here when
revising patches so we know what has changed since the previous
version(s). Also include the patch version in the subject line (e.g.
"[PATCH v2] USB: ...").

>  drivers/usb/serial/option.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c
> index c3f2522..d866cc0 100644
> --- a/drivers/usb/serial/option.c
> +++ b/drivers/usb/serial/option.c
> @@ -1927,6 +1927,8 @@ static int  option_probe(struct usb_serial *serial,
>  	{ USB_DEVICE_AND_INTERFACE_INFO(WETELECOM_VENDOR_ID, WETELECOM_PRODUCT_6802, 0xff, 0xff, 0xff) },
>  	{ USB_DEVICE_AND_INTERFACE_INFO(WETELECOM_VENDOR_ID, WETELECOM_PRODUCT_WMD300, 0xff, 0xff, 0xff) },
>  	{ USB_DEVICE_AND_INTERFACE_INFO(0x03f0, 0x421d, 0xff, 0xff, 0xff) }, /* HP lt2523 (Novatel E371) */
> +	{ USB_DEVICE_INTERFACE_CLASS(0x03f0, 0x0857, 0xff), /* HP lt4220 */
> +	  .driver_info = (kernel_ulong_t)&telit_le920a4_blacklist_1 },

So you dropped the id defines, but this still would not compile due to
the updated blacklist mechanism I mentioned. Take a look at the commit I
referred to for examples of how to specify the blacklist masks.

Thanks,
Johan
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