linux-kernel - Re: [PATCH v6 1/4] usb: gadget: udc: core: Introduce check

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Message-ID: <20210122051743.GE31406@jackp-linux.qualcomm.com>
Date:   Thu, 21 Jan 2021 21:17:43 -0800
From:   Jack Pham <jackp@...eaurora.org>
To:     Wesley Cheng <wcheng@...eaurora.org>
Cc:     balbi@...nel.org, gregkh@...uxfoundation.org, robh+dt@...nel.org,
        agross@...nel.org, bjorn.andersson@...aro.org,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        peter.chen@....com
Subject: Re: [PATCH v6 1/4] usb: gadget: udc: core: Introduce check_config to
 verify USB configuration

Hi Wesley,

On Thu, Jan 21, 2021 at 08:01:37PM -0800, Wesley Cheng wrote:
> Some UDCs may have constraints on how many high bandwidth endpoints it can
> support in a certain configuration.  This API allows for the composite
> driver to pass down the total number of endpoints to the UDC so it can verify
> it has the required resources to support the configuration.
> 
> Signed-off-by: Wesley Cheng <wcheng@...eaurora.org>
> ---
>  drivers/usb/gadget/udc/core.c | 9 +++++++++
>  include/linux/usb/gadget.h    | 2 ++
>  2 files changed, 11 insertions(+)
> 
> diff --git a/drivers/usb/gadget/udc/core.c b/drivers/usb/gadget/udc/core.c
> index 4173acd..469962f 100644
> --- a/drivers/usb/gadget/udc/core.c
> +++ b/drivers/usb/gadget/udc/core.c
> @@ -1003,6 +1003,15 @@ int usb_gadget_ep_match_desc(struct usb_gadget *gadget,
>  }
>  EXPORT_SYMBOL_GPL(usb_gadget_ep_match_desc);
>  
> +int usb_gadget_check_config(struct usb_gadget *gadget, unsigned long ep_map)

You should probably add a kernel-doc for this function.

Jack
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