linux-kernel - Re: [PATCH v3] pch

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Date:	Fri, 22 Jul 2011 21:39:01 +0900
From:	Tomoya MORINAGA <tomoya-linux@....okisemi.com>
To:	Alexander Stein <alexander.stein@...tec-electronic.com>
CC:	Greg KH <greg@...ah.com>, Alan Cox <alan@...ux.intel.com>,
	linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] pch_uart: Add MSI support

(2011/07/04 15:58), Alexander Stein wrote:
> Signed-off-by: Alexander Stein<alexander.stein@...tec-electronic.com>
> ---
> Hello Greg,
> 
> I'm sorry. This patch was based some other patches, like console support.
> 
> Changes in v3:
> * Rebased to current git master
> 
>   drivers/tty/serial/pch_uart.c |    5 +++++
>   1 files changed, 5 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c
> index 4652109..d3ba85b 100644
> --- a/drivers/tty/serial/pch_uart.c
> +++ b/drivers/tty/serial/pch_uart.c
> @@ -1429,6 +1429,8 @@ static struct eg20t_port *pch_uart_init_port(struct pci_dev *pdev,
>   		goto init_port_hal_free;
>   	}
> 
> +	pci_enable_msi(pdev);
> +
>   	iobase = pci_resource_start(pdev, 0);
>   	mapbase = pci_resource_start(pdev, 1);
>   	priv->mapbase = mapbase;
> @@ -1485,6 +1487,8 @@ static void pch_uart_pci_remove(struct pci_dev *pdev)
>   	struct eg20t_port *priv;
> 
>   	priv = (struct eg20t_port *)pci_get_drvdata(pdev);
> +
> +	pci_disable_msi(pdev);
>   	pch_uart_exit_port(priv);
>   	pci_disable_device(pdev);
>   	kfree(priv);
> @@ -1568,6 +1572,7 @@ static int __devinit pch_uart_pci_probe(struct pci_dev *pdev,
>   	return ret;
> 
>   probe_disable_device:
> +	pci_disable_msi(pdev);
>   	pci_disable_device(pdev);
>   probe_error:
>   	return ret;


Using this patch, PCH_UART doesn't work all.
For using MSI, I think, need bus master enable(pci_set_master) ?

Best Regards,
-- 
tomoya
OKI SEMICONDUCTOR CO., LTD.
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