linux-kernel - Re: [PATCH] r6040: disable pci device if the subsequent calls (after pci_enable

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Message-ID: <CAHdPZaPWM3MfyARfwOm2KkKPPvm4dEfncF47N2xASyp27HdzsA@mail.gmail.com>
Date:	Tue, 29 May 2012 15:28:51 +0530
From:	"devendra.aaru" <devendra.aaru@...il.com>
To:	Florian Fainelli <florian@...nwrt.org>
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] r6040: disable pci device if the subsequent calls (after
 pci_enable_device) fails

Hello Florian,

On Tue, May 29, 2012 at 2:50 PM, Florian Fainelli <florian@...nwrt.org> wrote:
> On Monday 28 May 2012 17:27:03 Devendra Naga wrote:
>> the calls after the pci_enable_device may fail, and will error out with out
>> disabling it. disable the device at error paths.
>
> Looks good, thanks Devendra!
>
>>
>> Signed-off-by: Devendra Naga <devendra.aaru@...il.com>
>
> Acked-by: Florian Fainelli <florian@...nwrt.org>
>
>> ---
>>  drivers/net/ethernet/rdc/r6040.c |   10 ++++++----
>>  1 file changed, 6 insertions(+), 4 deletions(-)
>>
>> diff --git a/drivers/net/ethernet/rdc/r6040.c
> b/drivers/net/ethernet/rdc/r6040.c
>> index 4de7364..8f5079a 100644
>> --- a/drivers/net/ethernet/rdc/r6040.c
>> +++ b/drivers/net/ethernet/rdc/r6040.c
>> @@ -1096,20 +1096,20 @@ static int __devinit r6040_init_one(struct pci_dev
> *pdev,
>>       if (err) {
>>               dev_err(&pdev->dev, "32-bit PCI DMA addresses"
>>                               "not supported by the card\n");
>> -             goto err_out;
>> +             goto err_out_disable_dev;
>>       }
>>       err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
>>       if (err) {
>>               dev_err(&pdev->dev, "32-bit PCI DMA addresses"
>>                               "not supported by the card\n");
>> -             goto err_out;
>> +             goto err_out_disable_dev;
>>       }
>>
>>       /* IO Size check */
>>       if (pci_resource_len(pdev, bar) < io_size) {
>>               dev_err(&pdev->dev, "Insufficient PCI resources, aborting\n");
>>               err = -EIO;
>> -             goto err_out;
>> +             goto err_out_disable_dev;
>>       }
>>
>>       pci_set_master(pdev);
>> @@ -1117,7 +1117,7 @@ static int __devinit r6040_init_one(struct pci_dev
> *pdev,
>>       dev = alloc_etherdev(sizeof(struct r6040_private));
>>       if (!dev) {
>>               err = -ENOMEM;
>> -             goto err_out;
>> +             goto err_out_disable_dev;
>>       }
>>       SET_NETDEV_DEV(dev, &pdev->dev);
>>       lp = netdev_priv(dev);
>> @@ -1238,6 +1238,8 @@ err_out_free_res:
>>       pci_release_regions(pdev);
>>  err_out_free_dev:
>>       free_netdev(dev);
>> +err_out_disable_dev:
>> +     pci_disable_device(dev);
>>  err_out:
>>       return err;
>>  }
>> --
>> 1.7.9.5
>>

Thanks for the Ack.
I found one more problem. Its when mdiobus_alloc fails in
r6040_init_one, we need to do call to the netif_napi_del and set the
NULL to pci_set_drvdata, at  err_out_unmap.

Thanks,
Devendra.
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