linux-kernel - Re: [PATCH] usb: gadget: f_acm: make bInterfaceProtocol configurable

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Message-ID: <2024073151-violator-unskilled-6866@gregkh>
Date: Wed, 31 Jul 2024 10:32:37 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: Michael Walle <mwalle@...nel.org>
Cc: linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] usb: gadget: f_acm: make bInterfaceProtocol configurable

On Tue, Jul 30, 2024 at 09:43:37PM +0200, Michael Walle wrote:
>  struct f_serial_opts {
>  	struct usb_function_instance func_inst;
>  	u8 port_num;
> +	u8 protocol;
> +
> +	struct mutex lock;
> +	int refcnt;

Attempting to "roll your own" reference count is almost never a good
idea.  If you really need one, please use the proper in-kernel apis for
this.  But you need to justify it as well, I didn't see why this was
needed at all.

thanks,

greg k-h