netdev - Re: [PATCH 3/6] net: davinci_emac: Free clock after checking the frequency

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Message-ID: <20150113195035.GS16533@saruman>
Date:	Tue, 13 Jan 2015 13:50:35 -0600
From:	Felipe Balbi <balbi@...com>
To:	Tom Lendacky <thomas.lendacky@....com>
CC:	Tony Lindgren <tony@...mide.com>,
	David Miller <davem@...emloft.net>, <netdev@...r.kernel.org>,
	<linux-omap@...r.kernel.org>,
	Brian Hutchinson <b.hutchman@...il.com>,
	Felipe Balbi <balbi@...com>
Subject: Re: [PATCH 3/6] net: davinci_emac: Free clock after checking the
 frequency

On Tue, Jan 13, 2015 at 01:48:24PM -0600, Tom Lendacky wrote:
> On 01/13/2015 01:29 PM, Tony Lindgren wrote:
> >We only use clk_get() to get the frequency, the rest is done by
> >the runtime PM calls. Let's free the clock too.
> >
> >Cc: Brian Hutchinson <b.hutchman@...il.com>
> >Cc: Felipe Balbi <balbi@...com>
> >Signed-off-by: Tony Lindgren <tony@...mide.com>
> >---
> >  drivers/net/ethernet/ti/davinci_emac.c | 1 +
> >  1 file changed, 1 insertion(+)
> >
> >diff --git a/drivers/net/ethernet/ti/davinci_emac.c b/drivers/net/ethernet/ti/davinci_emac.c
> >index deb43b3..e9efc74 100644
> >--- a/drivers/net/ethernet/ti/davinci_emac.c
> >+++ b/drivers/net/ethernet/ti/davinci_emac.c
> >@@ -1881,6 +1881,7 @@ static int davinci_emac_probe(struct platform_device *pdev)
> >  		return -EBUSY;
> >  	}
> >  	emac_bus_frequency = clk_get_rate(emac_clk);
> >+	clk_put(emac_clk);
> 
> The devm_clk_get call is used to get the clock so either a devm_clk_put
> needs to be used here or just let the devm_ call do its thing and
> automatically do the put when the module is unloaded.

instead, if you really don't need the clock for anything other than
getting its rate, why don't you just remove devm_ prefix from clk_get()?

-- 
balbi

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