Hello Greg,
can you pick this up?
> The protocol code is set 00 in IAD and it's set to 01 in ACM
> control interface descriptor in f_acm.c file. Due to this,
> windows is unable to install the modem(ACM) driver based on
> class-subclass-protocol matching.
>
> This patch corrects the protocol code in ACM IAD to the same
> as in acm_control_interface_desc protocol code.
>
> Acked-by: Linus Walleij <linus.walleij@xxxxxxxxxxxxxx>
> Signed-off-by: Praveena Nadahally <praveen.nadahally@xxxxxxxxxxxxxx>
> ---
> drivers/usb/gadget/f_acm.c | 2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/usb/gadget/f_acm.c b/drivers/usb/gadget/f_acm.c
> index d47a123..bd6226c 100644
> --- a/drivers/usb/gadget/f_acm.c
> +++ b/drivers/usb/gadget/f_acm.c
> @@ -111,7 +111,7 @@ acm_iad_descriptor = {
> .bInterfaceCount = 2, // control + data
> .bFunctionClass = USB_CLASS_COMM,
> .bFunctionSubClass = USB_CDC_SUBCLASS_ACM,
> - .bFunctionProtocol = USB_CDC_PROTO_NONE,
> + .bFunctionProtocol = USB_CDC_ACM_PROTO_AT_V25TER,
> /* .iFunction = DYNAMIC */
> };
>
> --
> 1.6.3.3
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