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

Timur Tabi
2015-11-03T16:46:39Z

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.

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