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authorTakashi Iwai <tiwai@suse.de>2011-03-09 17:33:48 +0100
committerTakashi Iwai <tiwai@suse.de>2011-03-09 20:10:37 +0100
commit848669da3a92fa6ab815e0517af3294afb3ea928 (patch)
treeac00a24c870f08e069397c94d506ae263c0bd1c1 /sound
parenta2800300f28bd1814f3ba8cfd93ecb0b00c2dfe3 (diff)
downloadlinux-next-848669da3a92fa6ab815e0517af3294afb3ea928.tar.gz
sound: Use sound_register_*() for additional OSS minor devices
Since OSS driver creates the device entries for /dev/audio* and /dev/dspW* by itself without coping with sound_core, it leads to conflicts with others and let sysfs spewing warnings. This patch rewrites the registration part of OSS driver to use the standard method also for additional minor devices. Reported-by: Steven Rostedt <rostedt@goodmis.org> (with ktest.pl) Tested-by: Steven Rostedt <rostedt@goodmis.org> (with ktest.pl) Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
-rw-r--r--sound/oss/soundcard.c56
-rw-r--r--sound/sound_core.c3
2 files changed, 23 insertions, 36 deletions
diff --git a/sound/oss/soundcard.c b/sound/oss/soundcard.c
index fcb14a099822..7c7793a0eb25 100644
--- a/sound/oss/soundcard.c
+++ b/sound/oss/soundcard.c
@@ -526,31 +526,21 @@ bad:
}
-/* These device names follow the official Linux device list,
- * Documentation/devices.txt. Let us know if there are other
- * common names we should support for compatibility.
- * Only those devices not created by the generic code in sound_core.c are
- * registered here.
- */
-static const struct {
- unsigned short minor;
- char *name;
- umode_t mode;
- int *num;
-} dev_list[] = { /* list of minor devices */
-/* seems to be some confusion here -- this device is not in the device list */
- {SND_DEV_DSP16, "dspW", S_IWUGO | S_IRUSR | S_IRGRP,
- &num_audiodevs},
- {SND_DEV_AUDIO, "audio", S_IWUGO | S_IRUSR | S_IRGRP,
- &num_audiodevs},
-};
-
static int dmabuf;
static int dmabug;
module_param(dmabuf, int, 0444);
module_param(dmabug, int, 0444);
+/* additional minors for compatibility */
+struct oss_minor_dev {
+ unsigned short minor;
+ unsigned int enabled;
+} dev_list[] = {
+ { SND_DEV_DSP16 },
+ { SND_DEV_AUDIO },
+};
+
static int __init oss_init(void)
{
int err;
@@ -571,18 +561,12 @@ static int __init oss_init(void)
sound_dmap_flag = (dmabuf > 0 ? 1 : 0);
for (i = 0; i < ARRAY_SIZE(dev_list); i++) {
- device_create(sound_class, NULL,
- MKDEV(SOUND_MAJOR, dev_list[i].minor), NULL,
- "%s", dev_list[i].name);
-
- if (!dev_list[i].num)
- continue;
-
- for (j = 1; j < *dev_list[i].num; j++)
- device_create(sound_class, NULL,
- MKDEV(SOUND_MAJOR,
- dev_list[i].minor + (j*0x10)),
- NULL, "%s%d", dev_list[i].name, j);
+ j = 0;
+ do {
+ unsigned short minor = dev_list[i].minor + j * 0x10;
+ if (!register_sound_special(&oss_sound_fops, minor))
+ dev_list[i].enabled = (1 << j);
+ } while (++j < num_audiodevs);
}
if (sound_nblocks >= MAX_MEM_BLOCKS - 1)
@@ -596,11 +580,11 @@ static void __exit oss_cleanup(void)
int i, j;
for (i = 0; i < ARRAY_SIZE(dev_list); i++) {
- device_destroy(sound_class, MKDEV(SOUND_MAJOR, dev_list[i].minor));
- if (!dev_list[i].num)
- continue;
- for (j = 1; j < *dev_list[i].num; j++)
- device_destroy(sound_class, MKDEV(SOUND_MAJOR, dev_list[i].minor + (j*0x10)));
+ j = 0;
+ do {
+ if (dev_list[i].enabled & (1 << j))
+ unregister_sound_special(dev_list[i].minor);
+ } while (++j < num_audiodevs);
}
unregister_sound_special(1);
diff --git a/sound/sound_core.c b/sound/sound_core.c
index 5580aced8730..6ce277860fd7 100644
--- a/sound/sound_core.c
+++ b/sound/sound_core.c
@@ -384,6 +384,9 @@ int register_sound_special_device(const struct file_operations *fops, int unit,
case 4:
name = "audio";
break;
+ case 5:
+ name = "dspW";
+ break;
case 8:
name = "sequencer2";
if (unit >= SOUND_STEP)