linux-kernel - Re: [PATCH net-next] r8169: add module param for control of ASPM disable

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Message-ID: <20180201232652.GA19190@electric-eye.fr.zoreil.com>
Date:   Fri, 2 Feb 2018 00:26:52 +0100
From:   Francois Romieu <romieu@...zoreil.com>
To:     Chunhao Lin <hau@...ltek.com>
Cc:     netdev@...r.kernel.org, nic_swsd@...ltek.com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next] r8169: add module param for control of ASPM
 disable

Chunhao Lin <hau@...ltek.com> :
[...]
> @@ -5878,6 +5881,20 @@ static void rtl_pcie_state_l2l3_enable(struct rtl8169_private *tp, bool enable)
>  	RTL_W8(Config3, data);
>  }
>  
> +static void rtl_hw_internal_aspm_clkreq_enable(struct rtl8169_private *tp,
> +				bool enable)
> +{
> +	void __iomem *ioaddr = tp->mmio_addr;
> +
> +	if (enable) {
> +		RTL_W8(Config2, RTL_R8(Config2) | ClkReqEn);
> +		RTL_W8(Config5, RTL_R8(Config5) | ASPM_en);
> +	} else {
> +		RTL_W8(Config2, RTL_R8(Config2) & ~ClkReqEn);
> +		RTL_W8(Config5, RTL_R8(Config5) & ~ASPM_en);
> +	}
> +}

s/enable(..., false)/disable()/

static void rtl_hw_internal_aspm_clkreq_enable(truct rtl8169_private *tp)
{
	void __iomem *ioaddr = tp->mmio_addr;

	RTL_W8(Config2, RTL_R8(Config2) | ClkReqEn);
	RTL_W8(Config5, RTL_R8(Config5) | ASPM_en);
}

static void rtl_hw_internal_aspm_clkreq_disable(truct rtl8169_private *tp)
{
	void __iomem *ioaddr = tp->mmio_addr;

	RTL_W8(Config2, RTL_R8(Config2) & ~ClkReqEn);
	RTL_W8(Config5, RTL_R8(Config5) & ~ASPM_en);
}

If you really want to factor something out, you may use helpers that set
or clear bits according to the 3-uple (tp, register, bits) but
foo_enable(..., false) is pointlessly convoluted.

-- 
Ueimor