linux-kernel - RE: [PATCH RESEND v5 05/14] PCI: dwc: Drop duplicated fast-link-mode flag unsetting

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Date:   Fri, 12 May 2023 09:55:57 +0000
From:   Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>
To:     Serge Semin <Sergey.Semin@...kalelectronics.ru>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Cai Huoqing <cai.huoqing@...ux.dev>,
        Jingoo Han <jingoohan1@...il.com>,
        Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
        Vinod Koul <vkoul@...nel.org>,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        Rob Herring <robh@...nel.org>,
        Manivannan Sadhasivam <mani@...nel.org>,
        Serge Semin <fancer.lancer@...il.com>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>
CC:     Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>,
        Pavel Parkhomenko <Pavel.Parkhomenko@...kalelectronics.ru>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "dmaengine@...r.kernel.org" <dmaengine@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH RESEND v5 05/14] PCI: dwc: Drop duplicated fast-link-mode
 flag unsetting

Hi Serge,

> From: Serge Semin, Sent: Friday, May 12, 2023 4:09 AM
> 
> Most likely by mistake the PORT_LINK_FAST_LINK_MODE flag unsetting was
> added twice in the commit cff9244432e8 ("PCI: dwc: Ensure FAST_LINK_MODE
> is cleared"): first it is cleared right after the content of the
> PCIE_PORT_LINK_CONTROL register is read, second it's cleared in the
> framework of the link-mode initialization procedure. The later action is
> redundant. Let's drop it.
> 
> Signed-off-by: Serge Semin <Sergey.Semin@...kalelectronics.ru>
> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>

I'm not sure whether my review is useful or not, but anyway,

Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>

Best regards,
Yoshihiro Shimoda

> ---
>  drivers/pci/controller/dwc/pcie-designware.c | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c
> index 8e33e6e59e68..e55b7b387eb6 100644
> --- a/drivers/pci/controller/dwc/pcie-designware.c
> +++ b/drivers/pci/controller/dwc/pcie-designware.c
> @@ -1019,7 +1019,6 @@ void dw_pcie_setup(struct dw_pcie *pci)
>  	}
> 
>  	/* Set the number of lanes */
> -	val &= ~PORT_LINK_FAST_LINK_MODE;
>  	val &= ~PORT_LINK_MODE_MASK;
>  	switch (pci->num_lanes) {
>  	case 1:
> --
> 2.40.0
>