diff options
| -rw-r--r-- | sound/pci/es1938.c | 33 |
1 files changed, 25 insertions, 8 deletions
diff --git a/sound/pci/es1938.c b/sound/pci/es1938.c index e8d943071a8c..a544cd52f73a 100644 --- a/sound/pci/es1938.c +++ b/sound/pci/es1938.c @@ -839,15 +839,12 @@ static snd_pcm_uframes_t snd_es1938_playback_pointer(struct snd_pcm_substream *s } static int snd_es1938_capture_copy(struct snd_pcm_substream *substream, - int channel, - snd_pcm_uframes_t pos, - void __user *dst, - snd_pcm_uframes_t count) + int channel, unsigned long pos, + void __user *dst, unsigned long count) { struct snd_pcm_runtime *runtime = substream->runtime; struct es1938 *chip = snd_pcm_substream_chip(substream); - pos <<= chip->dma1_shift; - count <<= chip->dma1_shift; + if (snd_BUG_ON(pos + count > chip->dma1_size)) return -EINVAL; if (pos + count < chip->dma1_size) { @@ -856,12 +853,31 @@ static int snd_es1938_capture_copy(struct snd_pcm_substream *substream, } else { if (copy_to_user(dst, runtime->dma_area + pos + 1, count - 1)) return -EFAULT; - if (put_user(runtime->dma_area[0], ((unsigned char __user *)dst) + count - 1)) + if (put_user(runtime->dma_area[0], + ((unsigned char __user *)dst) + count - 1)) return -EFAULT; } return 0; } +static int snd_es1938_capture_copy_kernel(struct snd_pcm_substream *substream, + int channel, unsigned long pos, + void *dst, unsigned long count) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct es1938 *chip = snd_pcm_substream_chip(substream); + + if (snd_BUG_ON(pos + count > chip->dma1_size)) + return -EINVAL; + if (pos + count < chip->dma1_size) { + memcpy(dst, runtime->dma_area + pos + 1, count); + } else { + memcpy(dst, runtime->dma_area + pos + 1, count - 1); + runtime->dma_area[0] = *((unsigned char *)dst + count - 1); + } + return 0; +} + /* * buffer management */ @@ -1012,7 +1028,8 @@ static const struct snd_pcm_ops snd_es1938_capture_ops = { .prepare = snd_es1938_capture_prepare, .trigger = snd_es1938_capture_trigger, .pointer = snd_es1938_capture_pointer, - .copy = snd_es1938_capture_copy, + .copy_user = snd_es1938_capture_copy, + .copy_kernel = snd_es1938_capture_copy_kernel, }; static int snd_es1938_new_pcm(struct es1938 *chip, int device) |