linux-kernel - Re: [PATCH v4 3/5] usb: gadget: udc: add Renesas RZ/N1 USBF controller support

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Date:   Wed, 21 Dec 2022 14:03:43 +0100
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Herve Codina <herve.codina@...tlin.com>
Cc:     Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Magnus Damm <magnus.damm@...il.com>,
        Gareth Williams <gareth.williams.jx@...esas.com>,
        linux-renesas-soc@...r.kernel.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-usb@...r.kernel.org,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Miquel Raynal <miquel.raynal@...tlin.com>
Subject: Re: [PATCH v4 3/5] usb: gadget: udc: add Renesas RZ/N1 USBF
 controller support

Hi Hervé,

On Tue, Dec 13, 2022 at 2:33 PM Herve Codina <herve.codina@...tlin.com> wrote:
> Add support for the Renesas USBF controller.
> This controller is an USB2.0 UDC controller available in the
> Renesas r9a06g032 SoC (RZ/N1 family).
>
> Signed-off-by: Herve Codina <herve.codina@...tlin.com>

Thanks for your patch!

> --- /dev/null
> +++ b/drivers/usb/gadget/udc/renesas_usbf.c

> +#ifdef DEBUG
> +#define TRACE(_fmt, ...) trace_printk("%s: " _fmt, __func__, ##__VA_ARGS__)
> +#define USBF_TRACE_EP_MASK 0x0ffff /* All the 16 endpoints */
> +#define TRACEEP(_ep, _fmt, ...)                                             \
> +       do {                                                                \
> +               if ((1 << (_ep)->id) & USBF_TRACE_EP_MASK)                  \
> +                       trace_printk("%s: " _fmt, __func__, ##__VA_ARGS__); \
> +       } while (0)
> +#else
> +#define TRACE(_fmt, ...) do { } while (0)
> +#define TRACEEP(_ep, _fmt, ...) do { } while (0)

Please use "no_printk(fmt, ##__VA_ARGS__)" instead of dummy loops,
to avoid bad callers going unnoticed if DEBUG is not defined.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds