Subject: [PATCH 4/5] dmaengine: hsu: Fix memory leak when stopping a running transfer

From: [email-masked] (Andy Shevchenko)
Date: Fri, 27 Mar 2015 14:01:58 +0200

On Fri, 2015-03-27 at 13:35 +0200, Peter Ujfalusi wrote:
> The vd->node is removed from the lists when the transfer started so the
> vchan_get_all_descriptors() will not find it. This results memory leak.
> 

Acked-by: Andy Shevchenko <[email-masked]>

Though this one would go via Greg's tty tree (Cc'ed) I think.
It becomes to regular work flow after 4.1-rc1.

> Signed-off-by: Peter Ujfalusi <[email-masked]>
> CC: Andy Shevchenko <[email-masked]>

> ---
>  drivers/dma/hsu/hsu.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/dma/hsu/hsu.c b/drivers/dma/hsu/hsu.c
> index 683ba9b62795..d1864bda008f 100644
> --- a/drivers/dma/hsu/hsu.c
> +++ b/drivers/dma/hsu/hsu.c
> @@ -387,7 +387,10 @@ static int hsu_dma_terminate_all(struct dma_chan *chan)
>  	spin_lock_irqsave(&hsuc->vchan.lock, flags);
>  
>  	hsu_dma_stop_channel(hsuc);
> -	hsuc->desc = NULL;
> +	if (hsuc->desc) {
> +		hsu_dma_desc_free(&hsuc->desc->vchan);
> +		hsuc->desc = NULL;
> +	}
>  
>  	vchan_get_all_descriptors(&hsuc->vchan, &head);
>  	spin_unlock_irqrestore(&hsuc->vchan.lock, flags);

-- 
Andy Shevchenko <[email-masked]>
Intel Finland Oy