linux-kernel - Re: [PATCH V2 2/3] dmaselftest: add memcpy selftest support functions

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Message-ID: <5638E4EA.1040905@codeaurora.org>
Date:	Tue, 3 Nov 2015 10:46:34 -0600
From:	Timur Tabi <timur@...eaurora.org>
To:	Sinan Kaya <okaya@...eaurora.org>,
	Vinod Koul <vinod.koul@...el.com>
Cc:	dmaengine@...r.kernel.org, cov@...eaurora.org, jcm@...hat.com,
	Dan Williams <dan.j.williams@...el.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH V2 2/3] dmaselftest: add memcpy selftest support functions

Sinan Kaya wrote:
> 1. Bug in ARM64 DMA subsystem.
> 2. Bug in IOMMU driver.
> 3. Bug in another newly introduced driver. The new driver would hog the
> CPU and won't allow HIDMA interrupts to execute. Therefore, the test
> times out.

Which driver?

Wouldn't these problems already be exposed by dmatest?  I was asking 
whether it's possible that, every now and then, your DMA internal test 
could fail and then the driver would unload.  I'm not talking about hard 
bugs in other code that always causes the DMA driver test to fail.

-- 
Sent by an employee of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the
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