Re: [PATCH] usb: cdns3: Fix PCI function reference leak in cdns3_pci_remove()

["Peter Chen (Qualcomm)" <peter.chen@kernel.org>]

On 26-09-17 16:06:22, Wentao Liang wrote:
> cdns3_get_second_fun() returns a device obtained with pci_get_device(),
> which takes a reference to it. cdns3_pci_remove() uses the device only
> to check whether the second function is enabled and then returns without
> dropping the reference.
> 
> Release it before returning.
> 
> Fixes: 7733f6c32e36 ("usb: cdns3: Add Cadence USB3 DRD Driver")
> Cc: stable@vger.kernel.org
> Signed-off-by: Wentao Liang <vulab@iscas.ac.cn>

Acked-by: Peter Chen <peter.chen@kernel.org>

Peter
> ---
>  drivers/usb/cdns3/cdns3-pci-wrap.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/usb/cdns3/cdns3-pci-wrap.c b/drivers/usb/cdns3/cdns3-pci-wrap.c
> index 1ad722e7704d..6639751ab22f 100644
> --- a/drivers/usb/cdns3/cdns3-pci-wrap.c
> +++ b/drivers/usb/cdns3/cdns3-pci-wrap.c
> @@ -188,6 +188,8 @@ static void cdns3_pci_remove(struct pci_dev *pdev)
>  
>  	if (!pci_is_enabled(func))
>  		kfree(wrap);
> +
> +	pci_dev_put(func);
>  }
>  
>  static const struct pci_device_id cdns3_pci_ids[] = {
> -- 
> 2.34.1
> 

-- 

Thanks,
Peter Chen