From: Bjorn Helgaas <bhelgaas@google.com>
To: Jiang Liu <liuj97@gmail.com>
Cc: Jiang Liu <jiang.liu@huawei.com>, Don Dutile <ddutile@redhat.com>,
Yinghai Lu <yinghai@kernel.org>,
Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>,
Yijing Wang <wangyijing@huawei.com>,
linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org,
Dave Airlie <airlied@redhat.com>,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Subject: Re: [PATCH 0/5] Simplify code by using hotplug safe pci_get_domain_bus_and_slot()
Date: Mon, 17 Sep 2012 13:34:46 -0600 [thread overview]
Message-ID: <CAErSpo6qSZ3Kgr7rDZt4wMW5nPiGhJBiQyaJPiA7+BY=ttyJLQ@mail.gmail.com> (raw)
In-Reply-To: <1346168638-32724-1-git-send-email-jiang.liu@huawei.com>
On Tue, Aug 28, 2012 at 9:43 AM, Jiang Liu <liuj97@gmail.com> wrote:
> Following code has a race window between pci_find_bus() and pci_get_slot()
> if PCI hotplug operation happens between them which removes the pci_bus.
> So use PCI hotplug safe interface pci_get_domain_bus_and_slot() instead,
> which also reduces code complexity.
>
> struct pci_bus *pci_bus = pci_find_bus(domain, busno);
> struct pci_dev *pci_dev = pci_get_slot(pci_bus, devfn);
>
> Jiang Liu (5):
> PCI/IA64: simplify code by hotplug safe pci_get_domain_bus_and_slot()
> PCI/vga: simplify code by hotplug safe pci_get_domain_bus_and_slot()
> PCI/cpcihp: simplify code by hotplug safe
> pci_get_domain_bus_and_slot()
> PCI/IOV: simplify code by hotplug safe pci_get_domain_bus_and_slot()
> PCI/xen-pcifront: simplify code by hotplug safe
> pci_get_domain_bus_and_slot()
I applied these to my "next" branch, including the vgaarb and xen bits. Thanks!
> arch/ia64/sn/kernel/io_common.c | 4 +---
> drivers/gpu/vga/vgaarb.c | 15 +++------------
> drivers/pci/hotplug/cpcihp_generic.c | 8 ++------
> drivers/pci/iov.c | 8 ++------
> drivers/pci/xen-pcifront.c | 10 ++--------
> 5 files changed, 10 insertions(+), 35 deletions(-)
>
> --
> 1.7.9.5
>
prev parent reply other threads:[~2012-09-17 19:35 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-28 15:43 [PATCH 0/5] Simplify code by using hotplug safe pci_get_domain_bus_and_slot() Jiang Liu
2012-08-28 15:43 ` [PATCH 1/5] PCI/IA64: simplify code by " Jiang Liu
2012-08-28 15:43 ` [PATCH 2/5] PCI/vga: " Jiang Liu
2012-08-28 15:43 ` [PATCH 3/5] PCI/cpcihp: " Jiang Liu
2012-08-28 15:43 ` [PATCH 4/5] PCI/IOV: " Jiang Liu
2012-09-20 20:38 ` Yinghai Lu
2012-09-20 23:59 ` Bjorn Helgaas
2012-09-21 0:02 ` Jiang Liu
2012-09-21 1:51 ` Yinghai Lu
2012-09-21 2:56 ` Bjorn Helgaas
2012-09-21 6:22 ` Yinghai Lu
2012-09-21 14:15 ` Don Dutile
2012-09-21 15:11 ` Yinghai Lu
2012-08-28 15:43 ` [PATCH 5/5] PCI/xen-pcifront: " Jiang Liu
2012-08-28 16:59 ` Konrad Rzeszutek Wilk
2012-08-28 23:56 ` Jiang Liu
2012-09-05 16:29 ` Konrad Rzeszutek Wilk
2012-09-05 20:32 ` Konrad Rzeszutek Wilk
2012-09-17 19:34 ` Bjorn Helgaas [this message]
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