ALSA: hda - Fix system panic when DMA > 40 bits for Nvidia audio controllers

The audio driver mistakenly allows 64 bit addresses to be created for
the audio driver on Nvidia GPUs.  Unfortunately, the hardware normally
only supports up to 40 bits of DMA.  This can cause system panics as
well as misdirected data when the address is > 40 bits as the upper
part the address is truncated.

Signed-off-by: Mike Travis <travis@sgi.com>
Reviewed-by: Mike Habeck <habeck@sgi.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 7b213d589ef654ba27b7056a4dd77b5b091de49c..de18722c487346858783fa5d5e9f9fd574b70b39 100644 (file)
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -615,7 +615,7 @@ enum {
 /* quirks for Nvidia */
 #define AZX_DCAPS_PRESET_NVIDIA \
        (AZX_DCAPS_NVIDIA_SNOOP | AZX_DCAPS_RIRB_DELAY | AZX_DCAPS_NO_MSI |\
-        AZX_DCAPS_ALIGN_BUFSIZE)
+        AZX_DCAPS_ALIGN_BUFSIZE | AZX_DCAPS_NO_64BIT)
 
 #define AZX_DCAPS_PRESET_CTHDA \
        (AZX_DCAPS_NO_MSI | AZX_DCAPS_POSFIX_LPIB | AZX_DCAPS_4K_BDLE_BOUNDARY)