Author: hselasky
Date: Thu May 21 07:48:06 2015
New Revision: 283192
URL: https://svnweb.freebsd.org/changeset/base/283192
Log:
MFC r282017:
Allow DSP basename cloning to be disabled or enabled at boot and
runtime. This is useful when implementing OSS sound stacks in
userspace via libcuse for example.
Modified:
stable/10/sys/dev/sound/pcm/dsp.c
Directory Properties:
stable/10/ (props changed)
Modified: stable/10/sys/dev/sound/pcm/dsp.c
==============================================================================
--- stable/10/sys/dev/sound/pcm/dsp.c Thu May 21 07:46:01 2015
(r283191)
+++ stable/10/sys/dev/sound/pcm/dsp.c Thu May 21 07:48:06 2015
(r283192)
@@ -48,6 +48,12 @@ SYSCTL_INT(_hw_snd, OID_AUTO, compat_lin
&dsp_mmap_allow_prot_exec, 0,
"linux mmap compatibility (-1=force disable 0=auto 1=force enable)");
+static int dsp_basename_clone = 1;
+SYSCTL_INT(_hw_snd, OID_AUTO, basename_clone, CTLFLAG_RWTUN,
+ &dsp_basename_clone, 0,
+ "DSP basename cloning (0: Disable; 1: Enabled)");
+TUNABLE_INT("hw.snd.basename_clone", &dsp_basename_clone);
+
struct dsp_cdevinfo {
struct pcm_channel *rdch, *wrch;
struct pcm_channel *volch;
@@ -2359,9 +2365,10 @@ dsp_clone(void *arg,
devname = devcmp;
devhw = dsp_cdevs[i].hw;
devcmax = dsp_cdevs[i].max - 1;
- if (strcmp(name, devcmp) == 0)
- unit = snd_unit;
- else if (dsp_stdclone(name, devcmp, devsep,
+ if (strcmp(name, devcmp) == 0) {
+ if (dsp_basename_clone != 0)
+ unit = snd_unit;
+ } else if (dsp_stdclone(name, devcmp, devsep,
dsp_cdevs[i].use_sep, &unit, &cunit) != 0) {
unit = -1;
cunit = -1;
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