Commit 49d9e77e authored by Mike Travis's avatar Mike Travis Committed by Takashi Iwai

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: default avatarMike Travis <travis@sgi.com>
Reviewed-by: default avatarMike Habeck <habeck@sgi.com>
Signed-off-by: Takashi Iwai's avatarTakashi Iwai <tiwai@suse.de>
parent 9ea6cfbc
......@@ -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)
......
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