linux-kernel - Re: [PATCH] pch_uart: Fix DMA resource leak issue

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Date:	Fri, 11 Nov 2011 08:37:40 +0000
From:	Alan Cox <alan@...ux.intel.com>
To:	Tomoya MORINAGA <tomoya.rohm@...il.com>
Cc:	gregkh@...e.de, linux-kernel@...r.kernel.org,
	linux-serial@...r.kernel.org, qi.wang@...el.com,
	yong.y.wang@...el.com, joel.clark@...el.com, kok.howg.ewe@...el.com
Subject: Re: [PATCH] pch_uart: Fix DMA resource leak issue

> MODIFICATION:
>   Currently, when release DMA channel resource, this driver checks
> dma-flag. However, this specification occurs the above issue.
>   This driver must check whether dma_request_channel is executed or
> not. The values are saved in private data variable "chan_tx/chan_tx".
>   These variables mean if the value is NULL, DMA channel is not
> requested, if not NULL, DMA channel is requested.
> 
> This patch fixes the issue.
> 
> Signed-off-by: Tomoya MORINAGA <tomoya.rohm@...il.com>

Acked-by: Alan Cox <alan@...ux.intel.com>
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