linux-kernel - Re: [PATCH 2/2] dma: tegra20-apbdma: channel freeing correction

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Message-ID: <50913A30.60802@nvidia.com>
Date:	Wed, 31 Oct 2012 20:18:16 +0530
From:	Laxman Dewangan <ldewangan@...dia.com>
To:	Dmitry Osipenko <digetx@...il.com>
CC:	"vinod.koul@...el.com" <vinod.koul@...el.com>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] dma: tegra20-apbdma: channel freeing correction

On Sunday 28 October 2012 07:47 PM, Dmitry Osipenko wrote:
> Fixed channel "lock" after free.
>
> Example: Channel 1 was allocated and prepared as slave_sg, used and freed. Now preparation of cyclic dma on channel 1 will fail with err "DMA
> configuration conflict" because tdc->isr_handler still selected to handle_once_dma_done.
>
> This happens because tegra_dma_abort_all() won't be called on channel freeing if pending list is empty.
>
> Signed-off-by: Dmitry Osipenko<digetx@...il.com>

Looks good to me.

Acked-by: Laxman Dewangan <ldewangan@...dia.com>

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