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

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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>
This commit is contained in:
Mike Travis 2013-05-01 14:04:08 -05:00 committed by Takashi Iwai
parent 9ea6cfbc2a
commit 49d9e77e72
1 changed files with 1 additions and 1 deletions
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2
sound/pci/hda/hda_intel.c
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@ -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)