linux-kernel - Re: [PATCH 4/7] bus: arm-cci: add missing of_node_put after calling of_parse

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Message-ID: <20160701103346.GF12735@arm.com>
Date:	Fri, 1 Jul 2016 11:33:47 +0100
From:	Will Deacon <will.deacon@....com>
To:	Suzuki K Poulose <Suzuki.Poulose@....com>
Cc:	Peter Chen <peter.chen@....com>, linux-renesas-soc@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-pm@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
	Sudeep Holla <Sudeep.Holla@....com>
Subject: Re: [PATCH 4/7] bus: arm-cci: add missing of_node_put after calling
 of_parse_phandle

On Fri, Jul 01, 2016 at 11:29:58AM +0100, Suzuki K Poulose wrote:
> On 01/07/16 10:41, Peter Chen wrote:
> >of_node_put needs to be called when the device node which is got
> >from of_parse_phandle has finished using.
> >
> >Cc: Will Deacon <will.deacon@....com>
> >Cc: Suzuki K Poulose <suzuki.poulose@....com>
> >Signed-off-by: Peter Chen <peter.chen@....com>
> 
> Thanks for the fix.
> 
> >---
> >  drivers/bus/arm-cci.c | 5 ++++-
> >  1 file changed, 4 insertions(+), 1 deletion(-)
> >
> >diff --git a/drivers/bus/arm-cci.c b/drivers/bus/arm-cci.c
> >index a49b283..e7b0b8c 100644
> >--- a/drivers/bus/arm-cci.c
> >+++ b/drivers/bus/arm-cci.c
> >@@ -1912,9 +1912,12 @@ static int __cci_ace_get_port(struct device_node *dn, int type)
> >  	cci_portn = of_parse_phandle(dn, "cci-control-port", 0);
> >  	for (i = 0; i < nb_cci_ports; i++) {
> >  		ace_match = ports[i].type == type;
> >-		if (ace_match && cci_portn == ports[i].dn)
> >+		if (ace_match && cci_portn == ports[i].dn) {
> >+			of_node_put(cci_portn);
> >  			return i;
> >+		}
> >  	}
> >+	of_node_put(cci_portn);
> 
> nit: Could we please do some thing like this ?
> 		if (ace_match && cci_portn == ports[i].dn)
> 			break;
> 	}
> 
> 	of_node_put(cci_portn);
> 	return (i < nb_cci_ports) ? i : -ENODEV ;
> 
> Either way,
> 
> Reviewed-by: Suzuki K Poulose <suzuki.poulose@....com>

Please route this via arm-soc once you've addressed Suzuki's comment.

Will