linux-kernel - Re: [PATCH v4 4/8] PCI: Replace dev_node parameter of of_pci_get_host_bridge

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Message-ID: <eb9b477a-33c9-db45-9e62-101e3606e8ff@siemens.com>
Date:   Mon, 28 May 2018 12:46:35 +0200
From:   Jan Kiszka <jan.kiszka@...mens.com>
To:     Vladimir Zapolskiy <vladimir_zapolskiy@...tor.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-pci@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Cc:     Jingoo Han <jingoohan1@...il.com>,
        Joao Pinto <Joao.Pinto@...opsys.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Subject: Re: [PATCH v4 4/8] PCI: Replace dev_node parameter of
 of_pci_get_host_bridge_resources with device

On 2018-05-28 12:00, Vladimir Zapolskiy wrote:
> Hi Jan, Bjorn,
> 
> On 05/15/2018 12:07 PM, Jan Kiszka wrote:
>> From: Jan Kiszka <jan.kiszka@...mens.com>
>>
>> Another step towards a managed version of
>> of_pci_get_host_bridge_resources(): Feed in the underlying device,
>> rather than just the OF node. This will allow to use managed resource
>> allocation internally later on.
>>
>> CC: Jingoo Han <jingoohan1@...il.com>
>> CC: Joao Pinto <Joao.Pinto@...opsys.com>
>> CC: Lorenzo Pieralisi <lorenzo.pieralisi@....com>
>> Signed-off-by: Jan Kiszka <jan.kiszka@...mens.com>
> 
> [snip]
> 
>> diff --git a/drivers/pci/host/pcie-altera.c b/drivers/pci/host/pcie-altera.c
>> index a6af62e0256d..61802e55a00c 100644
>> --- a/drivers/pci/host/pcie-altera.c
>> +++ b/drivers/pci/host/pcie-altera.c
>> @@ -488,11 +488,10 @@ static int altera_pcie_parse_request_of_pci_ranges(struct altera_pcie *pcie)
>>  {
>>  	int err, res_valid = 0;
>>  	struct device *dev = &pcie->pdev->dev;
>> -	struct device_node *np = dev->of_node;
>>  	struct resource_entry *win;
>>  
>> -	err = of_pci_get_host_bridge_resources(np, 0, 0xff, &pcie->resources,
>> -					       NULL);
>> +	err = of_pci_get_host_bridge_resources(dev, 0, 0xff
>> +						    &pcie->resources, NULL);
>>  	if (err)
>>  		return err;
>>  
> 
> In case if it is an undiscovered issue, a comma was mistakenly removed,
> which will result it compilation error.
> 
> The problem is also found in pci/next , see commit 88e3909aa125.

Yes, that's known. We have a bisection breakage: The issue was fixed
again by patch 6 in that series.

Jan

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