linux-kernel - Re: [PATCH v6 7/7] PCI: Unify wait for link active into generic pci

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Message-ID: <10da80a3-e058-1a21-7af2-405c99b7991e@codeaurora.org>
Date:   Fri, 19 Jan 2018 09:17:23 -0500
From:   Sinan Kaya <okaya@...eaurora.org>
To:     Oza Pawandeep <poza@...eaurora.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Philippe Ombredanne <pombredanne@...b.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Kate Stewart <kstewart@...uxfoundation.org>,
        linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
        Dongdong Liu <liudongdong3@...wei.com>,
        Keith Busch <keith.busch@...el.com>, Wei Zhang <wzhang@...com>,
        Timur Tabi <timur@...eaurora.org>
Subject: Re: [PATCH v6 7/7] PCI: Unify wait for link active into generic pci

On 1/19/2018 6:10 AM, Oza Pawandeep wrote:
> +++ b/drivers/pci/pcie/pcie-dpc.c
> @@ -150,37 +150,9 @@ static void dpc_wait_link_inactive(struct dpc_dev *dpc)
>  	struct pci_dev *pdev = dpc->dev->port;
>  	struct device *dev = &dpc->dev->device;
>  	u16 lnk_status;
> +	bool active = false;
>  
> -	pcie_capability_read_word(pdev, PCI_EXP_LNKSTA, &lnk_status);
> -	while (lnk_status & PCI_EXP_LNKSTA_DLLLA &&
> -					!time_after(jiffies, timeout)) {
> -		msleep(10);
> -		pcie_capability_read_word(pdev, PCI_EXP_LNKSTA, &lnk_status);
> -	}
> -	if (lnk_status & PCI_EXP_LNKSTA_DLLLA)
> -		dev_warn(dev, "Link state not disabled for DPC event\n");
> -}

I think you should reorder 6 and 7 to eliminate this.

-- 
Sinan Kaya
Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc.
Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.