diff options
| author | Andy Voltz <andy.voltz@timesys.com> | 2010-11-15 16:00:38 -0500 |
|---|---|---|
| committer | Andy Voltz <andy.voltz@timesys.com> | 2010-11-17 11:30:34 -0500 |
| commit | 2e0ae4bf137e282e825b27b02eb46f86c59d004e (patch) | |
| tree | 7c2534acd757ca414f02c5b983ee67eb2b2493c6 /sound/pci/cmipci.c | |
| parent | 22763c5cf3690a681551162c15d34d935308c8d7 (diff) | |
Bump Linux kernel to 2.6.32.25
Diffstat (limited to 'sound/pci/cmipci.c')
| -rw-r--r-- | sound/pci/cmipci.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/sound/pci/cmipci.c b/sound/pci/cmipci.c index ddcd4a9fd7e6..78c8736638d3 100644 --- a/sound/pci/cmipci.c +++ b/sound/pci/cmipci.c @@ -941,13 +941,21 @@ static snd_pcm_uframes_t snd_cmipci_pcm_pointer(struct cmipci *cm, struct cmipci struct snd_pcm_substream *substream) { size_t ptr; - unsigned int reg; + unsigned int reg, rem, tries; + if (!rec->running) return 0; #if 1 // this seems better.. reg = rec->ch ? CM_REG_CH1_FRAME2 : CM_REG_CH0_FRAME2; - ptr = rec->dma_size - (snd_cmipci_read_w(cm, reg) + 1); - ptr >>= rec->shift; + for (tries = 0; tries < 3; tries++) { + rem = snd_cmipci_read_w(cm, reg); + if (rem < rec->dma_size) + goto ok; + } + printk(KERN_ERR "cmipci: invalid PCM pointer: %#x\n", rem); + return SNDRV_PCM_POS_XRUN; +ok: + ptr = (rec->dma_size - (rem + 1)) >> rec->shift; #else reg = rec->ch ? CM_REG_CH1_FRAME1 : CM_REG_CH0_FRAME1; ptr = snd_cmipci_read(cm, reg) - rec->offset; |