linux-kernel - Re: [PATCH v2 1/8] PCI: brcmstb: Set gen limitation before link, not after

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Message-ID: <20250304145120.jrcxrvnuhj2cweyp@thinkpad>
Date: Tue, 4 Mar 2025 20:21:20 +0530
From: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To: Jim Quinlan <james.quinlan@...adcom.com>
Cc: linux-pci@...r.kernel.org, Nicolas Saenz Julienne <nsaenz@...nel.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
	Cyril Brulebois <kibi@...ian.org>,
	Stanimir Varbanov <svarbanov@...e.de>,
	bcm-kernel-feedback-list@...adcom.com, jim2101024@...il.com,
	Florian Fainelli <florian.fainelli@...adcom.com>,
	Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Krzysztof Wilczyński <kw@...ux.com>,
	Rob Herring <robh@...nel.org>,
	Andrew Murray <amurray@...goodpenguin.co.uk>,
	Jeremy Linton <jeremy.linton@....com>,
	"moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE" <linux-rpi-kernel@...ts.infradead.org>,
	"moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE" <linux-arm-kernel@...ts.infradead.org>,
	open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 1/8] PCI: brcmstb: Set gen limitation before link, not
 after

On Fri, Feb 14, 2025 at 12:39:29PM -0500, Jim Quinlan wrote:
> When the user elects to limit the PCIe generation via the appropriate DT
> property, apply the settings before the PCIe link-up, not after.
> 
> Fixes: c0452137034bda8f686dd9a2e167949bfffd6776 ("PCI: brcmstb: Add Broadcom STB PCIe host controller driver")
> 

Common practice is to use the 12 chars SHA for Fixes tag and not the entire 40
chars. Like,

Fixes: c0452137034b ("PCI: brcmstb: Add Broadcom STB PCIe host controller driver")

And no need of extra newline here.

> Signed-off-by: Jim Quinlan <james.quinlan@...adcom.com>

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>

- Mani

> ---
>  drivers/pci/controller/pcie-brcmstb.c | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c
> index 546056f7f0d3..64a7511e66a8 100644
> --- a/drivers/pci/controller/pcie-brcmstb.c
> +++ b/drivers/pci/controller/pcie-brcmstb.c
> @@ -1324,6 +1324,10 @@ static int brcm_pcie_start_link(struct brcm_pcie *pcie)
>  	bool ssc_good = false;
>  	int ret, i;
>  
> +	/* Limit the generation if specified */
> +	if (pcie->gen)
> +		brcm_pcie_set_gen(pcie, pcie->gen);
> +
>  	/* Unassert the fundamental reset */
>  	ret = pcie->cfg->perst_set(pcie, 0);
>  	if (ret)
> @@ -1350,9 +1354,6 @@ static int brcm_pcie_start_link(struct brcm_pcie *pcie)
>  
>  	brcm_config_clkreq(pcie);
>  
> -	if (pcie->gen)
> -		brcm_pcie_set_gen(pcie, pcie->gen);
> -
>  	if (pcie->ssc) {
>  		ret = brcm_pcie_set_ssc(pcie);
>  		if (ret == 0)
> -- 
> 2.43.0
> 

-- 
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