linux-kernel - Re: [PATCH net] r8169: Fix sleeping function called during get

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Date:	Wed, 9 Sep 2015 22:23:34 +0200
From:	Francois Romieu <romieu@...zoreil.com>
To:	Corinna Vinschen <vinschen@...hat.com>
Cc:	netdev@...r.kernel.org, David Miller <davem@...emloft.net>,
	pomidorabelisima@...il.com,
	Konrad Rzeszutek Wilk <konrad@...nel.org>,
	linux-kernel@...r.kernel.org, nic_swsd@...ltek.com
Subject: Re: [PATCH net] r8169: Fix sleeping function called during
 get_stats64

Corinna Vinschen <vinschen@...hat.com> :
[...]
> diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c
> index 24dcbe6..630811a 100644
> --- a/drivers/net/ethernet/realtek/r8169.c
> +++ b/drivers/net/ethernet/realtek/r8169.c
[...]
> +	if (!paddr)
> +		return false;

I guess this is the secret recipe.

What about replacing this part with an adequate barrier in rtl_init_one ?

[...]
> @@ -8447,9 +8411,14 @@ static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
>  
>  	tp->rtl_fw = RTL_FIRMWARE_UNKNOWN;
>  
> +	tp->CntArray = dma_alloc_coherent (&pdev->dev, sizeof(*tp->CntArray),
> +					   &tp->CntPhysAddr, GFP_KERNEL);
> +	if (!tp->CntArray)
> +		goto err_out_cnt_4;
> +

rc is still zero here so rtl_init_one will return success.

>  	rc = register_netdev(dev);
>  	if (rc < 0)
> -		goto err_out_msi_4;
> +		goto err_out_msi_5;
>  
>  	pci_set_drvdata(pdev, dev);

-- 
Ueimor
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