Messages in this thread | | | From | Ard Biesheuvel <> | Date | Tue, 18 Oct 2016 13:49:09 +0100 | Subject | Re: [PATCH] ALSA: hda - allow 40 bit DMA mask for NVidia devices |
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On 18 October 2016 at 13:46, Mike Travis <travis@sgi.com> wrote: > > Have you tested this change on a system which has physical > addressing > 40 bits to insure that addresses > 40 bits are > not simply truncated to an incorrect (mod 40) address?
The device should never see addresses > 40 bits, given that the DMA mask is set to 40 bits not 64.
> By not restricting the addresses to 32 bits you are not > restricting the device to the DMA32 zone. > > This is what caused the original panic on UV systems. > > Btw, the newest nVidia GPUs have > 40 bits of DMA address bits. >
Thanks, Ard.
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