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From: Vinod Koul <vinod.koul@intel.com>
To: Qiao Zhou <zhouqiao@marvell.com>
Cc: dan.j.williams@intel.com, dmaengine@vger.kernel.org,
	linux-kernel@vger.kernel.org, zhangfei.gao@linaro.org
Subject: Re: [PATCH] dma: mmp-pdma: fix irq handler overwrite physical chan issue
Date: Mon, 23 Feb 2015 16:53:30 +0530	[thread overview]
Message-ID: <20150223112330.GC5208@intel.com> (raw)
In-Reply-To: <1423030563-2090-1-git-send-email-zhouqiao@marvell.com>

On Wed, Feb 04, 2015 at 02:16:03PM +0800, Qiao Zhou wrote:
> Some dma channels may be reserved for other purpose in other layer,
> like secure driver in EL2/EL3. PDMA driver can see the interrupt
> status, but it should not try to handle related interrupt, since it
> doesn't belong to PDMA driver in kernel. These interrupts should be
> handled by corresponding client/module.Otherwise, it will overwrite
> illegal memory and cause unexpected issues, since pdma driver only
> requests resources for pdma channels.
> 
> In PDMA driver, the reserved channels are at the end of total 32
> channels. If we find interrupt bit index is not smaller than total
> dma channels, we should ignore it.
Applied, now

Thanks

-- 
~Vinod


      parent reply	other threads:[~2015-02-23 11:26 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-02-04  6:16 [PATCH] dma: mmp-pdma: fix irq handler overwrite physical chan issue Qiao Zhou
2015-02-06  5:27 ` Zhangfei Gao
2015-02-23 11:23 ` Vinod Koul [this message]

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