linux-kernel - Re: [PATCH v3 09/27] arm/PCI: Clean unused pcibios_add_bus() and pcibios_remove

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Message-ID: <5448A2A7.9090407@huawei.com>
Date:	Thu, 23 Oct 2014 14:39:35 +0800
From:	Yijing Wang <wangyijing@...wei.com>
To:	Bjorn Helgaas <bhelgaas@...gle.com>
CC:	<linux-pci@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	Xinwei Hu <huxinwei@...wei.com>, Wuyun <wuyun.wu@...wei.com>,
	<linux-arm-kernel@...ts.infradead.org>,
	Russell King <linux@....linux.org.uk>,
	<linux-arch@...r.kernel.org>, <arnab.basu@...escale.com>,
	<Bharat.Bhushan@...escale.com>, <x86@...nel.org>,
	Arnd Bergmann <arnd@...db.de>,
	Thomas Gleixner <tglx@...utronix.de>,
	"Konrad Rzeszutek Wilk" <konrad.wilk@...cle.com>,
	<xen-devel@...ts.xenproject.org>, Joerg Roedel <joro@...tes.org>,
	<iommu@...ts.linux-foundation.org>, <linux-mips@...ux-mips.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	<linuxppc-dev@...ts.ozlabs.org>, <linux-s390@...r.kernel.org>,
	Sebastian Ott <sebott@...ux.vnet.ibm.com>,
	"Tony Luck" <tony.luck@...el.com>, <linux-ia64@...r.kernel.org>,
	"David S. Miller" <davem@...emloft.net>,
	<sparclinux@...r.kernel.org>, Chris Metcalf <cmetcalf@...era.com>,
	Ralf Baechle <ralf@...ux-mips.org>,
	Lucas Stach <l.stach@...gutronix.de>,
	David Vrabel <david.vrabel@...rix.com>,
	"Sergei Shtylyov" <sergei.shtylyov@...entembedded.com>,
	Michael Ellerman <mpe@...erman.id.au>,
	Thierry Reding <thierry.reding@...il.com>,
	"Thomas Petazzoni" <thomas.petazzoni@...e-electrons.com>,
	Liviu Dudau <liviu@...au.co.uk>
Subject: Re: [PATCH v3 09/27] arm/PCI: Clean unused pcibios_add_bus() and
 pcibios_remove_bus()

>>  /*
>>   * Swizzle the device pin each time we cross a bridge.  If a platform does
>>   * not provide a swizzle function, we perform the standard PCI swizzling.
>> @@ -478,8 +464,6 @@ static void pcibios_init_hw(struct device *parent, struct hw_pci *hw,
>>  		sys->swizzle = hw->swizzle;
>>  		sys->map_irq = hw->map_irq;
>>  		sys->align_resource = hw->align_resource;
>> -		sys->add_bus = hw->add_bus;
>> -		sys->remove_bus = hw->remove_bus;
>>  		INIT_LIST_HEAD(&sys->resources);
>>  
>>  		if (hw->private_data)
> 
> What do the core changes below have to do with the ARM changes above?
> They should be a separate patch unless they can't be separated.

Hm, it's not the thing have to do, because the changes below is only used by arm arch, so I put it here
together. It's ok to split the core changes out to another one.

> 
>> diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
>> index f11108c..56e54ad 100644
>> --- a/drivers/pci/msi.c
>> +++ b/drivers/pci/msi.c
>> @@ -32,12 +32,10 @@ int pci_msi_ignore_mask;
>>  
>>  int __weak arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc)
>>  {
>> -	struct msi_chip *chip = dev->bus->msi;
>> +	struct msi_chip *chip;
>>  	int err;
>>  
>> -	if (!chip)
>> -		chip = pci_msi_chip(dev->bus);
>> -
>> +	chip = pci_msi_chip(dev->bus);
>>  	if (!chip || !chip->setup_irq)
>>  		return -EINVAL;
>>  
>> @@ -51,10 +49,7 @@ int __weak arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc)
>>  void __weak arch_teardown_msi_irq(unsigned int irq)
>>  {
>>  	struct msi_desc *entry = irq_get_msi_desc(irq);
>> -	struct msi_chip *chip = entry->dev->bus->msi;
>> -
>> -	if (!chip)
>> -		chip = pci_msi_chip(entry->dev->bus);
>> +	struct msi_chip *chip = pci_msi_chip(entry->dev->bus);
>>  
>>  	if (!chip || !chip->teardown_irq)
>>  		return;
>> -- 
>> 1.7.1
>>
>> --
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> 
> .
> 


-- 
Thanks!
Yijing

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