Re: [PATCH v4 2/2] USB: serial: blacklist USB-UIRT when driver is selected

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On Thu, Jun 10, 2021 at 11:16:25AM +0100, Sean Young wrote:
> The USB-UIRT device has its own driver, so blacklist the fdti driver
> from using it if the driver has been enabled.
> 
> Signed-off-by: Sean Young <sean@xxxxxxxx>
> ---
>  drivers/usb/serial/ftdi_sio.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
> index 369ef140df78..2e9a9076a38d 100644
> --- a/drivers/usb/serial/ftdi_sio.c
> +++ b/drivers/usb/serial/ftdi_sio.c
> @@ -106,7 +106,7 @@ static const struct ftdi_sio_quirk ftdi_NDI_device_quirk = {
>  	.probe	= ftdi_NDI_device_setup,
>  };
>  
> -static const struct ftdi_sio_quirk ftdi_USB_UIRT_quirk = {
> +static __maybe_unused const struct ftdi_sio_quirk ftdi_USB_UIRT_quirk = {

Why make this change?

>  	.port_probe = ftdi_USB_UIRT_setup,
>  };
>  
> @@ -568,8 +568,10 @@ static const struct usb_device_id id_table_combined[] = {
>  	{ USB_DEVICE(OCT_VID, OCT_DK201_PID) },
>  	{ USB_DEVICE(FTDI_VID, FTDI_HE_TIRA1_PID),
>  		.driver_info = (kernel_ulong_t)&ftdi_HE_TIRA1_quirk },
> +#if !IS_ENABLED(CONFIG_IR_UIRT)
>  	{ USB_DEVICE(FTDI_VID, FTDI_USB_UIRT_PID),
>  		.driver_info = (kernel_ulong_t)&ftdi_USB_UIRT_quirk },
> +#endif
>  	{ USB_DEVICE(FTDI_VID, PROTEGO_SPECIAL_1) },
>  	{ USB_DEVICE(FTDI_VID, PROTEGO_R2X0) },
>  	{ USB_DEVICE(FTDI_VID, PROTEGO_SPECIAL_3) },
> @@ -2281,7 +2283,7 @@ static int ftdi_sio_port_probe(struct usb_serial_port *port)
>  /* Setup for the USB-UIRT device, which requires hardwired
>   * baudrate (38400 gets mapped to 312500) */
>  /* Called from usbserial:serial_probe */
> -static void ftdi_USB_UIRT_setup(struct ftdi_private *priv)
> +static __maybe_unused void ftdi_USB_UIRT_setup(struct ftdi_private *priv)

Again, why this change here?

thanks,

greg k-h



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