Re: [PATCH v4 15/15] usb:hsotg:samsung: Add release function for hsotg device

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On Tue, Apr 17, 2012 at 09:22:11AM +0200, Lukasz Majewski wrote:
> Add release function to prevent kernel warning.
> Kfree is performed when all references are gone.
> 
> Signed-off-by: Sangwook Lee <sangwook.lee@xxxxxxxxxx>
> Signed-off-by: Lukasz Majewski <l.majewski@xxxxxxxxxxx>
> Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
> ---
>  drivers/usb/gadget/s3c-hsotg.c |   14 +++++++++++++-
>  1 files changed, 13 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/usb/gadget/s3c-hsotg.c b/drivers/usb/gadget/s3c-hsotg.c
> index 34e61b3..eb78044 100644
> --- a/drivers/usb/gadget/s3c-hsotg.c
> +++ b/drivers/usb/gadget/s3c-hsotg.c
> @@ -3531,6 +3543,7 @@ static int __devinit s3c_hsotg_probe(struct platform_device *pdev)
>  
>  	hsotg->gadget.dev.parent = dev;
>  	hsotg->gadget.dev.dma_mask = dev->dma_mask;
> +	hsotg->gadget.dev.release = s3c_hsotg_release;
>  
>  	/* reset the system */
>  
> @@ -3679,7 +3692,6 @@ static int __devexit s3c_hsotg_remove(struct platform_device *pdev)
>  	clk_put(hsotg->clk);
>  

I think I can see a missing clk_unprepare() right under the hunk... :)

Yep, you need to add the new clk_prepare/clk_unprepare calls.
clk_prepare_enable() and clk_disable_unprepare() are your friends.

cheers,
Domenico
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