linux-kernel - Re: [PATCH v4 02/11] PCI: imx6: Drop imx6_pcie_wait_for

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Date:   Mon, 15 Apr 2019 10:36:52 +0200
From:   Lucas Stach <l.stach@...gutronix.de>
To:     Andrey Smirnov <andrew.smirnov@...il.com>,
        linux-pci@...r.kernel.org
Cc:     Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Chris Healy <cphealy@...il.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 02/11] PCI: imx6: Drop imx6_pcie_wait_for_link()

Am Sonntag, den 14.04.2019, 17:46 -0700 schrieb Andrey Smirnov:
> All calls to imx6_pcie_wait_for_link() share the same error path and
> the state of PHY debug registers will already be printed there, so
> there's no real reason we can't just use dw_pcie_wait_for_link(). Drop
> imx6_pcie_wait_for_link() and replace it with dw_pcie_wait_for_link().
> 
> > Signed-off-by: Andrey Smirnov <andrew.smirnov@...il.com>
> > Suggested-by: Lucas Stach <l.stach@...gutronix.de>
> > Cc: Lorenzo Pieralisi <lorenzo.pieralisi@....com>
> > Cc: Bjorn Helgaas <bhelgaas@...gle.com>
> > Cc: Chris Healy <cphealy@...il.com>
> > Cc: Lucas Stach <l.stach@...gutronix.de>
> Cc: linux-kernel@...r.kernel.org
> Cc: linux-pci@...r.kernel.org

Reviewed-by: Lucas Stach <l.stach@...gutronix.de>

> ---
>  drivers/pci/controller/dwc/pci-imx6.c | 19 ++-----------------
>  1 file changed, 2 insertions(+), 17 deletions(-)
> 
> diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
> index ea2617712a3b..bb3dcfdbf697 100644
> --- a/drivers/pci/controller/dwc/pci-imx6.c
> +++ b/drivers/pci/controller/dwc/pci-imx6.c
> @@ -723,21 +723,6 @@ static int imx6_setup_phy_mpll(struct imx6_pcie *imx6_pcie)
> >  	return 0;
>  }
>  
> -static int imx6_pcie_wait_for_link(struct imx6_pcie *imx6_pcie)
> -{
> > -	struct dw_pcie *pci = imx6_pcie->pci;
> > -	struct device *dev = pci->dev;
> -
> > -	/* check if the link is up or not */
> > -	if (!dw_pcie_wait_for_link(pci))
> > -		return 0;
> -
> > -	dev_dbg(dev, "DEBUG_R0: 0x%08x, DEBUG_R1: 0x%08x\n",
> > -		dw_pcie_readl_dbi(pci, PCIE_PHY_DEBUG_R0),
> > -		dw_pcie_readl_dbi(pci, PCIE_PHY_DEBUG_R1));
> > -	return -ETIMEDOUT;
> -}
> -
>  static int imx6_pcie_wait_for_speed_change(struct imx6_pcie *imx6_pcie)
>  {
> >  	struct dw_pcie *pci = imx6_pcie->pci;
> @@ -796,7 +781,7 @@ static int imx6_pcie_establish_link(struct imx6_pcie *imx6_pcie)
> >  	/* Start LTSSM. */
> >  	imx6_pcie_ltssm_enable(dev);
>  
> > -	ret = imx6_pcie_wait_for_link(imx6_pcie);
> > +	ret = dw_pcie_wait_for_link(pci);
> >  	if (ret)
> >  		goto err_reset_phy;
>  
> @@ -834,7 +819,7 @@ static int imx6_pcie_establish_link(struct imx6_pcie *imx6_pcie)
> >  		}
>  
> >  		/* Make sure link training is finished as well! */
> > -		ret = imx6_pcie_wait_for_link(imx6_pcie);
> > +		ret = dw_pcie_wait_for_link(pci);
> >  		if (ret) {
> >  			dev_err(dev, "Failed to bring link up!\n");
> >  			goto err_reset_phy;