linux-kernel - Re: [PATCH] usb: gadget: langwell

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Date:	Mon, 4 Oct 2010 16:22:00 +0530
From:	Rahul Ruikar <rahul.ruikar@...il.com>
To:	Sergei Shtylyov <sshtylyov@...sta.com>
Cc:	David Brownell <dbrownell@...rs.sourceforge.net>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	Joe Perches <joe@...ches.com>, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] usb: gadget: langwell_udc: Fix error path

will resubmit this patch alongwith other patches.

Thanks
- Rahul Ruikar





On 4 October 2010 16:14, Sergei Shtylyov <sshtylyov@...sta.com> wrote:
> Hello.
>
> On 03-10-2010 17:49, Rahul Ruikar wrote:
>
>> - call device_unregister() only when device_register() is sucess.
>
>   s/is sucess/succeeds/
>
>> - call put_device() when device_register() fails.
>
>> Signed-off-by: Rahul Ruikar<rahul.ruikar@...il.com>
>> ---
>>  drivers/usb/gadget/langwell_udc.c |   18 ++++++++++++++----
>>  drivers/usb/gadget/langwell_udc.h |    4 +++-
>>  2 files changed, 17 insertions(+), 5 deletions(-)
>
>> diff --git a/drivers/usb/gadget/langwell_udc.c
>> b/drivers/usb/gadget/langwell_udc.c
>> index c2d2a20..2b5ae16 100644
>> --- a/drivers/usb/gadget/langwell_udc.c
>> +++ b/drivers/usb/gadget/langwell_udc.c
>> @@ -2952,8 +2952,13 @@ static void langwell_udc_remove(struct pci_dev
>> *pdev)
>>        INFO(dev, "unbind\n");
>>        DBG(dev, "<--- %s()\n", __func__);
>>
>> -       device_unregister(&dev->gadget.dev);
>> -       device_remove_file(&pdev->dev,&dev_attr_langwell_udc);
>> +       if (dev->dev_reg_status == 2)
>> +               device_unregister(&dev->gadget.dev);
>> +       else if (dev->dev_reg_status == 1)
>> +               put_device(&dev->gadget.dev);
>> +
>> +       if (dev->dev_create_file)
>> +               device_remove_file(&pdev->dev,&dev_attr_langwell_udc);
>>
>>  #ifndef       OTG_TRANSCEIVER
>>        pci_set_drvdata(pdev, NULL);
>> @@ -3190,12 +3195,17 @@ static int langwell_udc_probe(struct pci_dev
>> *pdev,
>>        the_controller = dev;
>>
>>        retval = device_register(&dev->gadget.dev);
>> -       if (retval)
>> +       if (retval) {
>> +               dev_reg_status = 1;
>
>   Did you mean 'dev->dev_reg_status'?
>
>>                goto error;
>> +       }
>> +       dev_reg_status = 2;
>
>   Same question.
>
>>
>>        retval = device_create_file(&pdev->dev,&dev_attr_langwell_udc);
>> -       if (retval)
>> +       if (retval) {
>> +               dev_create_file = 1;
>
>   Did you mean 'dev->dev_create_file'?
>
> WBR, Sergei
>
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