From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from gate.crashing.org ([63.228.1.57]:45879 "EHLO gate.crashing.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750833AbaJACdv (ORCPT ); Tue, 30 Sep 2014 22:33:51 -0400 Message-ID: <1412129393.4285.195.camel@pasglop> Subject: [PATCH 4/4] sounds/hda/radeon: Disable 64-bit DMA on radeon From: Benjamin Herrenschmidt To: Alex Deucher , Bjorn Helgaas Cc: Dave Airlie , Brian King , Takashi Iwai , linux-pci@vger.kernel.org, Yijing Wang , Anton Blanchard , linuxppc-dev@ozlabs.org Date: Wed, 01 Oct 2014 12:09:53 +1000 Content-Type: text/plain; charset="UTF-8" Mime-Version: 1.0 Sender: linux-pci-owner@vger.kernel.org List-ID: The chipset has a limitation in the number of address bits it can generate. The graphics portion uses a specific mask of 40 or 48 bits depending on the generation. For audio, it's a bit less of an issue, so just mark them as no-64bit for now. Without this, it crashes on POWER machines which can use high bits in the DMA address to distinguish between DMA windows. Signed-off-by: Benjamin Herrenschmidt CC: --- sound/pci/hda/hda_intel.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c index 3e6d22d..2b679d5 100644 --- a/sound/pci/hda/hda_intel.c +++ b/sound/pci/hda/hda_intel.c @@ -297,7 +297,7 @@ enum { /* quirks for ATI/AMD HDMI */ #define AZX_DCAPS_PRESET_ATI_HDMI \ (AZX_DCAPS_NO_TCSEL | AZX_DCAPS_SYNC_WRITE | AZX_DCAPS_POSFIX_LPIB|\ - AZX_DCAPS_NO_MSI64) + AZX_DCAPS_NO_MSI64 | AZX_DCAPS_NO_64BIT) /* quirks for Nvidia */ #define AZX_DCAPS_PRESET_NVIDIA \