linux-kernel - Re: [PATCH 00/13] Refactor pci_is

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Message-ID: <535B1EB4.3050408@huawei.com>
Date:	Sat, 26 Apr 2014 10:49:24 +0800
From:	Yijing Wang <wangyijing@...wei.com>
To:	David Laight <David.Laight@...LAB.COM>,
	Bjorn Helgaas <bhelgaas@...gle.com>
CC:	Tony Luck <tony.luck@...el.com>,
	"linux-ia64@...r.kernel.org" <linux-ia64@...r.kernel.org>,
	"x86@...nel.org" <x86@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"sparclinux@...r.kernel.org" <sparclinux@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: [PATCH 00/13] Refactor pci_is_brdige() to simplify code

On 2014/4/25 17:42, David Laight wrote:
> From: Yijing Wang
>> This patchset rename the current pci_is_bridge() to pci_has_subordinate(),
>> and introduce a new pci_is_bridge() which determine pci bridge by check
>> dev->hdr_type. The new one is more accurate. PCIe Spec define the pci
>> device is a bridge by the dev->hdr_type = 0x01 || 0x02.
> 
> That is a dangerous rename and is likely to cause difficult to

Hi David,
   I renamed pci_is_bridge() to pci_has_subordinate() because

static inline bool pci_is_bridge(struct pci_dev *pci_dev)
{
	return !!(pci_dev->subordinate);
}

which always check dev->subordinate.

> identify bugs in any code you've missed.

What are you referring to ?


Thanks!
Yijing.






> 
> 	David
> 
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-- 
Thanks!
Yijing

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