If a 32-bit application is being used with a 64-bit kernel and is using the mmap mechanism to write data, then the SNDRV_PCM_IOCTL_SYNC_PTR ioctl results in calling snd_pcm_ioctl_sync_ptr_compat(). Make this use pcm_lib_apply_appl_ptr() so that the substream's ack() method, if defined, is called.

The snd_pcm_sync_ptr() function, used in the 64-bit ioctl case, already uses snd_pcm_ioctl_sync_ptr_compat().

Signed-off-by: Alan Young consult.awy@gmail.com ---  sound/core/pcm_native.c | 11 ++++++++---  1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c index 17a85f4815d5..91a749835ca1 100644 --- a/sound/core/pcm_native.c +++ b/sound/core/pcm_native.c @@ -3057,9 +3057,14 @@ static int snd_pcm_ioctl_sync_ptr_compat(struct snd_pcm_substream *substream,          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 +    if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL)) { +        err = pcm_lib_apply_appl_ptr(substream, +                scontrol.appl_ptr); +        if (err < 0) { +            snd_pcm_stream_unlock_irq(substream); +            return err; +        } +    } else          scontrol.appl_ptr = control->appl_ptr % boundary;      if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))          control->avail_min = scontrol.avail_min;