linux-kernel - Re: [PATCH] PCI: set correct value for iov device before device

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Message-ID: <51A6EBBE.6020805@huawei.com>
Date:	Thu, 30 May 2013 14:03:42 +0800
From:	Yijing Wang <wangyijing@...wei.com>
To:	Xudong Hao <xudong.hao@...el.com>
CC:	<bhelgaas@...gle.com>, <yinghai@...nel.org>,
	<linux-pci@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	Jiang Liu <liuj97@...il.com>
Subject: Re: [PATCH] PCI: set correct value for iov device before device

Hi Xudong,
   This bug has been fixed by Jiang Liu in patch
https://patchwork.kernel.org/patch/2613481/


On 2013/5/30 13:45, Xudong Hao wrote:
> Since device registering is put into pci_device_add(), it must set value of
> Virtual Function device's member before the pci_dev is put to device tree. Or
> some relevant subsystem of driver model such as xen will report a incorrect
> IOV device to Xen hypervior.
> 
> Signed-off-by: Xudong Hao <xudong.hao@...el.com>
> ---
>  drivers/pci/iov.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c
> index c93071d..43d3de9 100644
> --- a/drivers/pci/iov.c
> +++ b/drivers/pci/iov.c
> @@ -110,12 +110,12 @@ static int virtfn_add(struct pci_dev *dev, int id, int reset)
>  	if (reset)
>  		__pci_reset_function(virtfn);
>  
> -	pci_device_add(virtfn, virtfn->bus);
> -	mutex_unlock(&iov->dev->sriov->lock);
> -
>  	virtfn->physfn = pci_dev_get(dev);
>  	virtfn->is_virtfn = 1;
>  
> +	pci_device_add(virtfn, virtfn->bus);
> +	mutex_unlock(&iov->dev->sriov->lock);
> +
>  	rc = pci_bus_add_device(virtfn);
>  	sprintf(buf, "virtfn%u", id);
>  	rc = sysfs_create_link(&dev->dev.kobj, &virtfn->dev.kobj, buf);
> 


-- 
Thanks!
Yijing

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