linux-kernel - Re: [PATCH] pch_dma: Fix suspend issue

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Message-ID: <4E8E940E.7040701@dsn.lapis-semi.com>
Date:	Fri, 07 Oct 2011 14:54:22 +0900
From:	Tomoya MORINAGA <tomoya-linux@....lapis-semi.com>
To:	Vinod Koul <vinod.koul@...el.com>
CC:	Dan Williams <dan.j.williams@...el.com>,
	linux-kernel@...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_dma: Fix suspend issue

(2011/10/07 14:00), Vinod Koul wrote:
> How would changing the max number of descriptors fix the memory
> violation?
>

In probe of pch_dma,  you can see the following code.

	for (i = 0; i < nr_channels; i++) {

snip...

		pd_chan->membase = &regs->desc[i];

snip...

	}

Max value of nr_channels is 12 defined at pci_table.
So, this caused memory access violation.

-- 
tomoya
ROHM Co., Ltd.
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