diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-12-08 07:47:46 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-12-08 07:47:46 -0800 |
| commit | a421018e8c10e5593a1fee076af72a66c3fe8ca3 (patch) | |
| tree | 2854511845d0e07d33726a13eda6de1059a5c9df /sound/core/isadma.c | |
| parent | 3ad1f3b35e8309ec93454dbf89beaafcdb5312da (diff) | |
| parent | 86e1d57e4f24ca27ce813bdc2afaac4adafcbaf4 (diff) | |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6: (294 commits)
S3C64XX: Staticise platform data for PCM devices
ASoC: Rename controls with a / in wm_hubs
snd-fm801: autodetect SF64-PCR (tuner-only) card
ALSA: tea575x-tuner: fix mute
ASoC: au1x: dbdma2: plug memleak in pcm device creation error path
ASoC: au1x: dbdma2: fix oops on soc device removal.
ALSA: hda - Fix memory leaks in the previous patch
ALSA: hda - Add ALC661/259, ALC892/888VD support
ALSA: opti9xx: remove snd_opti9xx fields
ALSA: aaci - Clean up duplicate code
ALSA: usb - Fix mixer map for Hercules Gamesurround Muse Pocket LT
ALSA: hda - Add position_fix quirk for HP dv3
ALSA: hda - Add a pin-fix for FSC Amilo Pi1505
ALSA: hda - Fix Cxt5047 test mode
ASoC: pxa/raumfeld: adopt new snd_soc_dai_set_pll() API
ASoC: sh: fsi: Add runtime PM support
sh: ms7724se: Add runtime PM support for FSI
ALSA: hda - Add a position_fix quirk for MSI Wind U115
ALSA: opti-miro: add PnP detection
ALSA: opti-miro: separate comon probing code
...
Diffstat (limited to 'sound/core/isadma.c')
| -rw-r--r-- | sound/core/isadma.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/sound/core/isadma.c b/sound/core/isadma.c index 79f0f16af33..950e19ba91f 100644 --- a/sound/core/isadma.c +++ b/sound/core/isadma.c @@ -85,16 +85,24 @@ EXPORT_SYMBOL(snd_dma_disable); unsigned int snd_dma_pointer(unsigned long dma, unsigned int size) { unsigned long flags; - unsigned int result; + unsigned int result, result1; flags = claim_dma_lock(); clear_dma_ff(dma); if (!isa_dma_bridge_buggy) disable_dma(dma); result = get_dma_residue(dma); + /* + * HACK - read the counter again and choose higher value in order to + * avoid reading during counter lower byte roll over if the + * isa_dma_bridge_buggy is set. + */ + result1 = get_dma_residue(dma); if (!isa_dma_bridge_buggy) enable_dma(dma); release_dma_lock(flags); + if (unlikely(result < result1)) + result = result1; #ifdef CONFIG_SND_DEBUG if (result > size) snd_printk(KERN_ERR "pointer (0x%x) for DMA #%ld is greater than transfer size (0x%x)\n", result, dma, size); |