ALSA: hda - Terradici HDA controllers does not support 64-bit mode

commit 396087eaead95fcb29eb36f1e59517aeb58c545e upstream.

Confirmed from vendor and tests in RedHat bugzilla #536782 .

Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 6517f589d01d6bd7be51aec9e3b2f557acfe2319..7e4ee4e89737c4443981511072fc95624f509eb5 100644 (file)
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -2436,6 +2436,11 @@ static int __devinit azx_create(struct snd_card *card, struct pci_dev *pci,
                }
        }
 
+       /* disable 64bit DMA address for Teradici */
+       /* it does not work with device 6549:1200 subsys e4a2:040b */
+       if (chip->driver_type == AZX_DRIVER_TERA)
+               gcap &= ~ICH6_GCAP_64OK;
+
        /* allow 64bit DMA address if supported by H/W */
        if ((gcap & ICH6_GCAP_64OK) && !pci_set_dma_mask(pci, DMA_BIT_MASK(64)))
                pci_set_consistent_dma_mask(pci, DMA_BIT_MASK(64));