linux-kernel - Re: [PATCH] usb: host: ohci-ppc-of: Fix refcount leak bug

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Message-ID: <Yqyal2aXvZRebui+@rowland.harvard.edu>
Date:   Fri, 17 Jun 2022 11:15:35 -0400
From:   Alan Stern <stern@...land.harvard.edu>
To:     Liang He <windhl@....com>
Cc:     gregkh@...uxfoundation.org, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] usb: host: ohci-ppc-of: Fix refcount leak bug

On Fri, Jun 17, 2022 at 11:46:37AM +0800, Liang He wrote:
> In ohci_hcd_ppc_of_probe(), of_find_compatible_node() will return
> a node pointer with refcount incremented. We should use of_node_put()
> when it is not used anymore.
> 
> Signed-off-by: Liang He <windhl@....com>
> ---

Acked-by: Alan Stern <stern@...land.harvard.edu>

This seems to be the last one; ehci-ppc-of.c was already fixed by an 
earlier patch.

>  drivers/usb/host/ohci-ppc-of.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/usb/host/ohci-ppc-of.c b/drivers/usb/host/ohci-ppc-of.c
> index 1960b8dfdba5..591f675cc930 100644
> --- a/drivers/usb/host/ohci-ppc-of.c
> +++ b/drivers/usb/host/ohci-ppc-of.c
> @@ -166,6 +166,7 @@ static int ohci_hcd_ppc_of_probe(struct platform_device *op)
>  				release_mem_region(res.start, 0x4);
>  		} else
>  			pr_debug("%s: cannot get ehci offset from fdt\n", __FILE__);
> +		of_node_put(np);
>  	}
>  
>  	irq_dispose_mapping(irq);
> -- 
> 2.25.1
>