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Re: [RFC PATCH v4 19/28] swiotlb: Add warnings for use of bounce buffers with SME

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  Re: [RFC PATCH v4 19/28] swiotlb: Add warnings for use of bounce  buffers with SME Paolo Bonzini <pbonzini@redhat.com> - 2017-03-02 18:20 +0100

#1591305 — Re: [RFC PATCH v4 19/28] swiotlb: Add warnings for use of bounce buffers with SME

On 17/02/2017 17:51, Tom Lendacky wrote:
> 
> It's meant just to notify the user about the condition. The user could
> then decide to use an alternative device that supports a greater DMA
> range (I can probably change it to a dev_warn_once() so that a device
> is identified).  I would be nice if I could issue this message once per
> device that experienced this.  I didn't see anything that would do
> that, though.

dev_warn_once would print once only, not once per device.  But if you
leave the dev_warn elsewhere, this can be just pr_warn_once.

Paolo

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