forked from luck/tmp_suning_uos_patched
932e9dec38
When running a 32bit kernel the hda_intel driver is still reporting
a 64bit dma_mask if the HW supports it.
From sound/pci/hda/hda_intel.c:
/* 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));
else {
pci_set_dma_mask(pci, DMA_BIT_MASK(32));
pci_set_consistent_dma_mask(pci, DMA_BIT_MASK(32));
}
which means when there is a call to dma_alloc_coherent from
snd_malloc_dev_pages a machine address bigger than 32bit can be returned.
This can be true in particular if running the 32bit kernel as a pv dom0
under the Xen Hypervisor or PAE on bare metal.
The problem is that when calling setup_bdle to program the BLE the
dma_addr_t returned from the dma_alloc_coherent is wrongly truncated
from snd_sgbuf_get_addr if running a 32bit kernel:
static inline dma_addr_t snd_sgbuf_get_addr(struct snd_dma_buffer *dmab,
size_t offset)
{
struct snd_sg_buf *sgbuf = dmab->private_data;
dma_addr_t addr = sgbuf->table[offset >> PAGE_SHIFT].addr;
addr &= PAGE_MASK;
return addr + offset % PAGE_SIZE;
}
where PAGE_MASK in a 32bit kernel is zeroing the upper 32bit af addr.
Without this patch the HW will fetch the 32bit truncated address,
which is not the one obtained from dma_alloc_coherent and will result
to a non working audio but can corrupt host memory at a random location.
The current patch apply to v3.13-rc3-74-g6c843f5
Signed-off-by: Stefano Panella <stefano.panella@citrix.com>
Reviewed-by: Frediano Ziglio <frediano.ziglio@citrix.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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| .. | ||
| ac97_codec.h | ||
| aci.h | ||
| ad1816a.h | ||
| ad1843.h | ||
| adau1373.h | ||
| aess.h | ||
| ak4xxx-adda.h | ||
| ak4113.h | ||
| ak4114.h | ||
| ak4117.h | ||
| ak4531_codec.h | ||
| ak4641.h | ||
| alc5623.h | ||
| asequencer.h | ||
| asound.h | ||
| asoundef.h | ||
| atmel-abdac.h | ||
| atmel-ac97c.h | ||
| compress_driver.h | ||
| control.h | ||
| core.h | ||
| cs42l52.h | ||
| cs42l73.h | ||
| cs4231-regs.h | ||
| cs4271.h | ||
| cs8403.h | ||
| cs8427.h | ||
| da7213.h | ||
| da9055.h | ||
| designware_i2s.h | ||
| dmaengine_pcm.h | ||
| emu10k1_synth.h | ||
| emu10k1.h | ||
| emu8000_reg.h | ||
| emu8000.h | ||
| emux_legacy.h | ||
| emux_synth.h | ||
| es1688.h | ||
| gus.h | ||
| hda_hwdep.h | ||
| hwdep.h | ||
| i2c.h | ||
| info.h | ||
| initval.h | ||
| jack.h | ||
| l3.h | ||
| max9768.h | ||
| max98088.h | ||
| max98090.h | ||
| max98095.h | ||
| memalloc.h | ||
| minors.h | ||
| mixer_oss.h | ||
| mpu401.h | ||
| opl3.h | ||
| opl4.h | ||
| pcm_oss.h | ||
| pcm_params.h | ||
| pcm-indirect.h | ||
| pcm.h | ||
| pt2258.h | ||
| pxa2xx-lib.h | ||
| rawmidi.h | ||
| rcar_snd.h | ||
| rt5640.h | ||
| s3c24xx_uda134x.h | ||
| sb16_csp.h | ||
| sb.h | ||
| seq_device.h | ||
| seq_kernel.h | ||
| seq_midi_emul.h | ||
| seq_midi_event.h | ||
| seq_oss_legacy.h | ||
| seq_oss.h | ||
| seq_virmidi.h | ||
| sh_dac_audio.h | ||
| sh_fsi.h | ||
| simple_card.h | ||
| snd_wavefront.h | ||
| soc-dai.h | ||
| soc-dapm.h | ||
| soc-dpcm.h | ||
| soc.h | ||
| soundfont.h | ||
| spear_dma.h | ||
| spear_spdif.h | ||
| sta32x.h | ||
| tas5086.h | ||
| tea6330t.h | ||
| timer.h | ||
| tlv320aic3x.h | ||
| tlv320aic32x4.h | ||
| tlv320dac33-plat.h | ||
| tlv.h | ||
| tpa6130a2-plat.h | ||
| uda134x.h | ||
| uda1380.h | ||
| util_mem.h | ||
| vx_core.h | ||
| wavefront.h | ||
| wm0010.h | ||
| wm1250-ev1.h | ||
| wm2000.h | ||
| wm2200.h | ||
| wm5100.h | ||
| wm8903.h | ||
| wm8904.h | ||
| wm8955.h | ||
| wm8960.h | ||
| wm8962.h | ||
| wm8993.h | ||
| wm8996.h | ||
| wm9081.h | ||
| wm9090.h | ||
| wss.h | ||