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[ALSA] Fix control/status mmap with shared PCM substream

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The flag to avoid 32bit-incompatible mmap for control/status records
should be outside the pcm substream instance since a substream can be
shared among multiple opens.  Now it's flagged in pcm_file list that
is directly assigned to file->private_data.
Also, removed snd_pcm_add_file() and remove_file() functions and
substream.files field that are not really used in the code.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
This commit is contained in:
Takashi Iwai
2006-07-31 16:51:51 +02:00
committed by Jaroslav Kysela
parent 1c39855804
commit 548a648b98
3 changed files with 12 additions and 43 deletions
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sound/core/pcm_compat.c
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@@ -478,7 +478,7 @@ static long snd_pcm_ioctl_compat(struct file *file, unsigned int cmd, unsigned l
* mmap of PCM status/control records because of the size
* incompatibility.
*/
substream->no_mmap_ctrl = 1;
pcm_file->no_compat_mmap = 1;
switch (cmd) {
case SNDRV_PCM_IOCTL_PVERSION: