On Mon, 12 Jul 2021 12:05:40 +0200, Alan Young wrote:

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().

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From 9c3a4ffca82a0106cd858db8be29945cfbcc9952 Mon Sep 17 00:00:00 2001

From: Alan Young consult.awy@gmail.com Date: Fri, 9 Jul 2021 09:48:54 +0100 Subject: [PATCH] ALSA: core: Call substream ack() method upon compat mmap commit

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

Thanks, applied.

Takashi