linux-kernel - Re: [PATCH v9 4/7] PCI/DPC: Unify and plumb error handling into DPC

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Message-ID: <fc5351ba-1310-5ccf-b0cb-8565679d4c22@infradead.org>
Date:   Thu, 22 Feb 2018 11:23:35 -0800
From:   Randy Dunlap <rdunlap@...radead.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>,
        Sinan Kaya <okaya@...eaurora.org>,
        Timur Tabi <timur@...eaurora.org>
Subject: Re: [PATCH v9 4/7] PCI/DPC: Unify and plumb error handling into DPC

On 02/21/2018 11:46 PM, Oza Pawandeep wrote:
> Current DPC driver does not do recovery, e.g. calling end-point's driver's
> callbacks, which sanitize the sw.
> 
> DPC driver implements link_reset callback, and calls pci_do_recovery.

Hi,
What does DPC mean?

> Signed-off-by: Oza Pawandeep <poza@...eaurora.org>
> 

> diff --git a/drivers/pci/pcie/pcie-dpc.c b/drivers/pci/pcie/pcie-dpc.c
> index 38e40c6..208b427 100644
> --- a/drivers/pci/pcie/pcie-dpc.c
> +++ b/drivers/pci/pcie/pcie-dpc.c

> @@ -82,12 +137,25 @@ static void dpc_wait_link_inactive(struct dpc_dev *dpc)
>  		dev_warn(dev, "Link state not disabled for DPC event\n");
>  }
>  
> +/**
> + * dpc_reset_link - reset link DPC  routine
 + * @dev: pointer to Root Port's pci_dev data structure

   * @pdev: ...

> + *
> + * Invoked by Port Bus driver when performing link reset at Root Port.
> + */
> +static pci_ers_result_t dpc_reset_link(struct pci_dev *pdev)
>  {

You can use 'make W=1 ...' to find kernel-doc warnings like this.

thanks,
-- 
~Randy