diff options
Diffstat (limited to 'sound/core/pcm_compat.c')
| -rw-r--r-- | sound/core/pcm_compat.c | 49 |
1 files changed, 34 insertions, 15 deletions
diff --git a/sound/core/pcm_compat.c b/sound/core/pcm_compat.c index 3920bf0eebbf..4b6307df846d 100644 --- a/sound/core/pcm_compat.c +++ b/sound/core/pcm_compat.c @@ -103,10 +103,24 @@ struct sndrv_pcm_sw_params32 { unsigned char reserved[64]; }; +/* recalcuate the boundary within 32bit */ +static snd_pcm_uframes_t recalculate_boundary(snd_pcm_runtime_t *runtime) +{ + snd_pcm_uframes_t boundary; + + if (! runtime->buffer_size) + return 0; + boundary = runtime->buffer_size; + while (boundary * 2 <= 0x7fffffffUL - runtime->buffer_size) + boundary *= 2; + return boundary; +} + static int snd_pcm_ioctl_sw_params_compat(snd_pcm_substream_t *substream, struct sndrv_pcm_sw_params32 __user *src) { snd_pcm_sw_params_t params; + snd_pcm_uframes_t boundary; int err; memset(¶ms, 0, sizeof(params)); @@ -120,10 +134,17 @@ static int snd_pcm_ioctl_sw_params_compat(snd_pcm_substream_t *substream, get_user(params.silence_threshold, &src->silence_threshold) || get_user(params.silence_size, &src->silence_size)) return -EFAULT; + /* + * Check silent_size parameter. Since we have 64bit boundary, + * silence_size must be compared with the 32bit boundary. + */ + boundary = recalculate_boundary(substream->runtime); + if (boundary && params.silence_size >= boundary) + params.silence_size = substream->runtime->boundary; err = snd_pcm_sw_params(substream, ¶ms); if (err < 0) return err; - if (put_user(params.boundary, &src->boundary)) + if (boundary && put_user(boundary, &src->boundary)) return -EFAULT; return err; } @@ -199,16 +220,6 @@ static int snd_pcm_status_user_compat(snd_pcm_substream_t *substream, return err; } -/* recalcuate the boundary within 32bit */ -static void recalculate_boundary(snd_pcm_runtime_t *runtime) -{ - if (! runtime->buffer_size) - return; - runtime->boundary = runtime->buffer_size; - while (runtime->boundary * 2 <= 0x7fffffffUL - runtime->buffer_size) - runtime->boundary *= 2; -} - /* both for HW_PARAMS and HW_REFINE */ static int snd_pcm_ioctl_hw_params_compat(snd_pcm_substream_t *substream, int refine, @@ -241,8 +252,11 @@ static int snd_pcm_ioctl_hw_params_compat(snd_pcm_substream_t *substream, goto error; } - if (! refine) - recalculate_boundary(runtime); + if (! refine) { + unsigned int new_boundary = recalculate_boundary(runtime); + if (new_boundary) + runtime->boundary = new_boundary; + } error: kfree(data); return err; @@ -380,6 +394,7 @@ static int snd_pcm_ioctl_sync_ptr_compat(snd_pcm_substream_t *substream, u32 sflags; struct sndrv_pcm_mmap_control scontrol; struct sndrv_pcm_mmap_status sstatus; + snd_pcm_uframes_t boundary; int err; snd_assert(runtime, return -EINVAL); @@ -395,17 +410,21 @@ static int snd_pcm_ioctl_sync_ptr_compat(snd_pcm_substream_t *substream, } status = runtime->status; control = runtime->control; + boundary = recalculate_boundary(runtime); + if (! boundary) + boundary = 0x7fffffff; snd_pcm_stream_lock_irq(substream); + /* FIXME: we should consider the boundary for the sync from app */ if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL)) control->appl_ptr = scontrol.appl_ptr; else - scontrol.appl_ptr = control->appl_ptr; + scontrol.appl_ptr = control->appl_ptr % boundary; if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) control->avail_min = scontrol.avail_min; else scontrol.avail_min = control->avail_min; sstatus.state = status->state; - sstatus.hw_ptr = status->hw_ptr; + sstatus.hw_ptr = status->hw_ptr % boundary; sstatus.tstamp = status->tstamp; sstatus.suspended_state = status->suspended_state; snd_pcm_stream_unlock_irq(substream); |