linux-kernel - Re: [PATCH v2 1/6] misc: sram: fix error path in sram

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Date:	Tue, 25 Jun 2013 11:04:34 +0200
From:	Philipp Zabel <p.zabel@...gutronix.de>
To:	Heiko Stübner <heiko@...ech.de>
Cc:	Arnd Bergmann <arnd@...db.de>, Olof Johansson <olof@...om.net>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <robherring2@...il.com>,
	devicetree-discuss@...ts.ozlabs.org,
	Russell King <linux@....linux.org.uk>,
	linux-kernel@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH v2 1/6] misc: sram: fix error path in sram_probe

Hi Heiko,

Am Dienstag, den 25.06.2013, 10:46 +0200 schrieb Heiko Stübner:
> The pool is created thru devm_gen_pool_create, so the call to
> gen_pool_destroy is not necessary.
> Instead the sram-clock must be turned off again if it exists.
> 
> Signed-off-by: Heiko Stuebner <heiko@...ech.de>
> ---
>  drivers/misc/sram.c |    3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/misc/sram.c b/drivers/misc/sram.c
> index d87cc91..afe66571 100644
> --- a/drivers/misc/sram.c
> +++ b/drivers/misc/sram.c
> @@ -68,7 +68,8 @@ static int sram_probe(struct platform_device *pdev)
>  	ret = gen_pool_add_virt(sram->pool, (unsigned long)virt_base,
>  				res->start, size, -1);
>  	if (ret < 0) {
> -		gen_pool_destroy(sram->pool);

Right, thanks.

> +		if (sram->clk)
> +			clk_disable_unprepare(sram->clk);
>  		return ret;
>  	}
>  

In light of the following patch, I'd rather move the
clk_prepare_enable() call after gen_pool_add_virt() and its error path.

regards
Philipp

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