linux-kernel - Re: [PATCH v1 1/1] serial: 8250_exar: derive nr

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Date:   Thu, 23 Dec 2021 12:05:11 +0200 (EET)
From:   Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
cc:     linux-serial <linux-serial@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jirislaby@...nel.org>
Subject: Re: [PATCH v1 1/1] serial: 8250_exar: derive nr_ports from ID for
 Acces I/O cards

On Wed, 22 Dec 2021, Andy Shevchenko wrote:

> In the similar way how it's done in 8250_pericom, derive number of
> UART ports from PCI ID for Acces I/O cards.
> 
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> ---
>  drivers/tty/serial/8250/8250_exar.c | 37 ++++++++++-------------------
>  1 file changed, 13 insertions(+), 24 deletions(-)
> 
> diff --git a/drivers/tty/serial/8250/8250_exar.c b/drivers/tty/serial/8250/8250_exar.c
> index a4508ac0cac9..cf16bd889abd 100644
> --- a/drivers/tty/serial/8250/8250_exar.c
> +++ b/drivers/tty/serial/8250/8250_exar.c
> @@ -611,7 +611,12 @@ exar_pci_probe(struct pci_dev *pcidev, const struct pci_device_id *ent)
>  
>  	maxnr = pci_resource_len(pcidev, bar) >> (board->reg_shift + 3);
>  
> -	nr_ports = board->num_ports ? board->num_ports : pcidev->device & 0x0f;
> +	if (pcidev->vendor == PCI_VENDOR_ID_ACCESSIO)
> +		nr = BIT(((pcidev->device & 0x38) >> 3) - 1);

Shouldn't this be nr_ports = ...

-- 
 i.


> +	else if (board->num_ports)
> +		nr_ports = board->num_ports;
> +	else
> +		nr_ports = pcidev->device & 0x0f;
>  
>  	priv = devm_kzalloc(&pcidev->dev, struct_size(priv, line, nr_ports), GFP_KERNEL);
>  	if (!priv)
> @@ -710,22 +715,6 @@ static int __maybe_unused exar_resume(struct device *dev)
>  
>  static SIMPLE_DEV_PM_OPS(exar_pci_pm, exar_suspend, exar_resume);
>  
> -static const struct exar8250_board acces_com_2x = {
> -	.num_ports	= 2,
> -	.setup		= pci_xr17c154_setup,
> -};
> -
> -static const struct exar8250_board acces_com_4x = {
> -	.num_ports	= 4,
> -	.setup		= pci_xr17c154_setup,
> -};
> -
> -static const struct exar8250_board acces_com_8x = {
> -	.num_ports	= 8,
> -	.setup		= pci_xr17c154_setup,
> -};
> -
> -
>  static const struct exar8250_board pbn_fastcom335_2 = {
>  	.num_ports	= 2,
>  	.setup		= pci_fastcom335_setup,
> @@ -810,13 +799,13 @@ static const struct exar8250_board pbn_exar_XR17V8358 = {
>  	}
>  
>  static const struct pci_device_id exar_pci_tbl[] = {
> -	EXAR_DEVICE(ACCESSIO, COM_2S, acces_com_2x),
> -	EXAR_DEVICE(ACCESSIO, COM_4S, acces_com_4x),
> -	EXAR_DEVICE(ACCESSIO, COM_8S, acces_com_8x),
> -	EXAR_DEVICE(ACCESSIO, COM232_8, acces_com_8x),
> -	EXAR_DEVICE(ACCESSIO, COM_2SM, acces_com_2x),
> -	EXAR_DEVICE(ACCESSIO, COM_4SM, acces_com_4x),
> -	EXAR_DEVICE(ACCESSIO, COM_8SM, acces_com_8x),
> +	EXAR_DEVICE(ACCESSIO, COM_2S, pbn_exar_XR17C15x),
> +	EXAR_DEVICE(ACCESSIO, COM_4S, pbn_exar_XR17C15x),
> +	EXAR_DEVICE(ACCESSIO, COM_8S, pbn_exar_XR17C15x),
> +	EXAR_DEVICE(ACCESSIO, COM232_8, pbn_exar_XR17C15x),
> +	EXAR_DEVICE(ACCESSIO, COM_2SM, pbn_exar_XR17C15x),
> +	EXAR_DEVICE(ACCESSIO, COM_4SM, pbn_exar_XR17C15x),
> +	EXAR_DEVICE(ACCESSIO, COM_8SM, pbn_exar_XR17C15x),
>  
>  	CONNECT_DEVICE(XR17C152, UART_2_232, pbn_connect),
>  	CONNECT_DEVICE(XR17C154, UART_4_232, pbn_connect),
>