Subject: [PATCH 4/4] sounds/hda/radeon: Disable 64-bit DMA on radeon

From: Benjamin Herrenschmidt <[email-masked]>
Date: Wed, 01 Oct 2014 12:09:53 +1000

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 <[email-masked]>
CC: <[email-masked]>
---
 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 \