linux-kernel - Re: [PATCHv5 07/20] PCI: mobiveil: Use WIN_NUM

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Message-ID: <20190612151331.GE15747@redmoon>
Date:   Wed, 12 Jun 2019 16:13:31 +0100
From:   Lorenzo Pieralisi <lorenzo.pieralisi@....com>
To:     "Z.q. Hou" <zhiqiang.hou@....com>
Cc:     "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "bhelgaas@...gle.com" <bhelgaas@...gle.com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "l.subrahmanya@...iveil.co.in" <l.subrahmanya@...iveil.co.in>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        Leo Li <leoyang.li@....com>,
        "catalin.marinas@....com" <catalin.marinas@....com>,
        "will.deacon@....com" <will.deacon@....com>,
        Mingkai Hu <mingkai.hu@....com>,
        "M.h. Lian" <minghuan.lian@....com>,
        Xiaowei Bao <xiaowei.bao@....com>
Subject: Re: [PATCHv5 07/20] PCI: mobiveil: Use WIN_NUM_0 explicitly for CFG
 outbound window

On Fri, Apr 12, 2019 at 08:35:54AM +0000, Z.q. Hou wrote:
> From: Hou Zhiqiang <Zhiqiang.Hou@....com>
> 
> As the .map_bus() use the WIN_NUM_0 for CFG transactions,
> it's better passing WIN_NUM_0 explicitly when initialize
> the CFG outbound window.
> 
> Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@....com>
> Reviewed-by: Minghuan Lian <Minghuan.Lian@....com>
> Reviewed-by: Subrahmanya Lingappa <l.subrahmanya@...iveil.co.in>
> ---
> V5:
>  - Corrected the subject.
> 
>  drivers/pci/controller/pcie-mobiveil.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/pci/controller/pcie-mobiveil.c b/drivers/pci/controller/pcie-mobiveil.c
> index b2cc9c097fc9..df71c11b4810 100644
> --- a/drivers/pci/controller/pcie-mobiveil.c
> +++ b/drivers/pci/controller/pcie-mobiveil.c
> @@ -612,9 +612,8 @@ static int mobiveil_host_init(struct mobiveil_pcie *pcie)
>  	 */
>  
>  	/* config outbound translation window */
> -	program_ob_windows(pcie, pcie->ob_wins_configured,
> -			   pcie->ob_io_res->start, 0, CFG_WINDOW_TYPE,
> -			   resource_size(pcie->ob_io_res));
> +	program_ob_windows(pcie, WIN_NUM_0, pcie->ob_io_res->start, 0,
> +			   CFG_WINDOW_TYPE, resource_size(pcie->ob_io_res));

This makes sense - current code is quite obscure and prone to
bugs.

Lorenzo

>  	/* memory inbound translation window */
>  	program_ib_windows(pcie, WIN_NUM_1, 0, MEM_WINDOW_TYPE, IB_WIN_SIZE);
> -- 
> 2.17.1
>