Update of /cvsroot/alsa/alsa-kernel/core/ioctl32
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv738/core/ioctl32
Modified Files:
ioctl32.c
Log Message:
- fixed the oops in OSS mixer when the control elements are dynamically
changed (e.g. emufx).
mixer_oss.c handles the numid instead of kcontrol_t pointers.
- snd_ctl_find_id and snd_ctl_find_numid don't issue contros_rwsem.
the caller has to handle it properly.
Index: ioctl32.c
===================================================================
RCS file: /cvsroot/alsa/alsa-kernel/core/ioctl32/ioctl32.c,v
retrieving revision 1.18
retrieving revision 1.19
diff -u -r1.18 -r1.19
--- ioctl32.c 4 Sep 2003 09:09:21 -0000 1.18
+++ ioctl32.c 26 Jan 2004 11:48:40 -0000 1.19
@@ -259,12 +259,15 @@
ctl = snd_magic_cast(snd_ctl_file_t, file->private_data, return -ENXIO);
+ down_read(&ctl->card->controls_rwsem);
kctl = snd_ctl_find_id(ctl->card, id);
if (! kctl) {
+ up_read(&ctl->card->controls_rwsem);
return -ENXIO;
}
info.id = *id;
err = kctl->info(kctl, &info);
+ up_read(&ctl->card->controls_rwsem);
if (err >= 0)
err = info.type;
return err;
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