linux-kernel - Re: [PATCH v17 03/12] PCI/ERR: Remove service dependency in pcie_do

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Date:   Tue, 17 Mar 2020 07:40:57 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     sathyanarayanan.kuppuswamy@...ux.intel.com
Cc:     bhelgaas@...gle.com, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org, ashok.raj@...el.com
Subject: Re: [PATCH v17 03/12] PCI/ERR: Remove service dependency in
 pcie_do_recovery()

> -static pci_ers_result_t reset_link(struct pci_dev *dev, u32 service)
> +static pci_ers_result_t reset_link(struct pci_dev *dev,
> +			pci_ers_result_t (*reset_cb)(struct pci_dev *pdev))
>  {
>  	pci_ers_result_t status;
> -	struct pcie_port_service_driver *driver = NULL;
>  
> -	driver = pcie_port_find_service(dev, service);
> -	if (driver && driver->reset_link) {
> -		status = driver->reset_link(dev);
> +	if (reset_cb) {
> +		status = reset_cb(dev);

As far as I can tell reset_cb is never NULL.  So all the code below
is dead, and the remainder of reset_link is so trivial that it can
be inlined into the only caller.