On 09.03.2014 02:44, Krishna Chaitanya wrote:
> On Sat, Mar 8, 2014 at 2:41 AM, Alexey Khoroshilov
> <khoroshilov@xxxxxxxxx> wrote:
>> If p54u_load_firmware() fails, p54u_probe() does not deallocate
>> already allocated resources. The patch adds proper failure handling.
>>
>> Found by Linux Driver Verification project (linuxtesting.org).
>>
>> Signed-off-by: Alexey Khoroshilov <khoroshilov@xxxxxxxxx>
>> ---
>> drivers/net/wireless/p54/p54usb.c | 4 ++++
>> 1 file changed, 4 insertions(+)
>>
>> diff --git a/drivers/net/wireless/p54/p54usb.c b/drivers/net/wireless/p54/p54usb.c
>> index 6e635cfa24c8..5df74503fd4f 100644
>> --- a/drivers/net/wireless/p54/p54usb.c
>> +++ b/drivers/net/wireless/p54/p54usb.c
>> @@ -1053,6 +1053,10 @@ static int p54u_probe(struct usb_interface *intf,
>> priv->upload_fw = p54u_upload_firmware_net2280;
>> }
>> err = p54u_load_firmware(dev, intf);
>> + if (err) {
>> + usb_put_dev(udev);
>> + p54_free_common(dev);
>> + }
>> return err;
>> }
> The load_firmware puts down the reference
> in case of error. Only free is required here.
No, p54u_load_firmware() puts down reference that was got up by itself.
So we still have to put down reference got up in p54u_probe().
--
Alexey
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