netdev - Re: [PATCH net] net: fealnx: fix missing pci_disable

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Date:   Tue, 25 Oct 2022 10:47:42 +0300
From:   Leon Romanovsky <leon@...nel.org>
To:     Yang Yingliang <yangyingliang@...wei.com>
Cc:     netdev@...r.kernel.org, davem@...emloft.net, kuba@...nel.org
Subject: Re: [PATCH net] net: fealnx: fix missing pci_disable_device()

On Mon, Oct 24, 2022 at 09:57:28PM +0800, Yang Yingliang wrote:
> pci_disable_device() need be called while module exiting, switch
> to use pcim_enable(), pci_disable_device() and pci_release_regions()
> will be called in pcim_release() while unbinding device.

I didn't understand the description at all, maybe people in CC will.
Most likely, you wanted something like this:

diff --git a/drivers/net/ethernet/fealnx.c b/drivers/net/ethernet/fealnx.c
index ed18450fd2cc..78107dd4aa57 100644
--- a/drivers/net/ethernet/fealnx.c
+++ b/drivers/net/ethernet/fealnx.c
@@ -690,6 +690,7 @@ static void fealnx_remove_one(struct pci_dev *pdev)
                pci_iounmap(pdev, np->mem);
                free_netdev(dev);
                pci_release_regions(pdev);
+               pci_disable_device(pdev);
        } else
                printk(KERN_ERR "fealnx: remove for unknown device\n");


> 
> Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
> Signed-off-by: Yang Yingliang <yangyingliang@...wei.com>
> ---
>  drivers/net/ethernet/fealnx.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/drivers/net/ethernet/fealnx.c b/drivers/net/ethernet/fealnx.c
> index ed18450fd2cc..fb139f295b67 100644
> --- a/drivers/net/ethernet/fealnx.c
> +++ b/drivers/net/ethernet/fealnx.c
> @@ -494,7 +494,7 @@ static int fealnx_init_one(struct pci_dev *pdev,
>  
>  	option = card_idx < MAX_UNITS ? options[card_idx] : 0;
>  
> -	i = pci_enable_device(pdev);
> +	i = pcim_enable_device(pdev);
>  	if (i) return i;
>  	pci_set_master(pdev);
>  
> @@ -670,7 +670,6 @@ static int fealnx_init_one(struct pci_dev *pdev,
>  err_out_unmap:
>  	pci_iounmap(pdev, ioaddr);
>  err_out_res:
> -	pci_release_regions(pdev);
>  	return err;
>  }
>  
> @@ -689,7 +688,6 @@ static void fealnx_remove_one(struct pci_dev *pdev)
>  		unregister_netdev(dev);
>  		pci_iounmap(pdev, np->mem);
>  		free_netdev(dev);
> -		pci_release_regions(pdev);
>  	} else
>  		printk(KERN_ERR "fealnx: remove for unknown device\n");
>  }
> -- 
> 2.25.1
>