sound: request char-major-* module aliases for missing OSS devices

Till now missing OSS devices emitted sound-slot/service-* module
alises instead of the standard char-major-* if a missing device number
is opened if soundcore is loaded.  The custom module aliases don't
have any inherent benefit than backward compatibility.

sound-slot/service-* module aliases is scheduled to be removed and to
help the transition this patch makes soundcore emit the standard
module alises along with the custom ones.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 12 insertions, 0 deletions

diff --git a/sound/sound_core.c b/sound/sound_core.c
index a41f8b127f49..786067c49b01 100644
--- a/sound/sound_core.c
+++ b/sound/sound_core.c
@@ -541,6 +541,7 @@ static int soundcore_open(struct inode *inode, struct file *file)
                 new_fops = fops_get(s->unit_fops);
         if (!new_fops) {
                 spin_unlock(&sound_loader_lock);
+
                 /*
                  *  Please, don't change this order or code.
                  *  For ALSA slot means soundcard and OSS emulation code
@@ -550,6 +551,17 @@ static int soundcore_open(struct inode *inode, struct file *file)
                  */
                 request_module("sound-slot-%i", unit>>4);
                 request_module("sound-service-%i-%i", unit>>4, chain);
+
+                /*
+                 * sound-slot/service-* module aliases are scheduled
+                 * for removal in favor of the standard char-major-*
+                 * module aliases.  For the time being, generate both
+                 * the legacy and standard module aliases to ease
+                 * transition.
+                 */
+                if (request_module("char-major-%d-%d", SOUND_MAJOR, unit) > 0)
+                        request_module("char-major-%d", SOUND_MAJOR);
+
                 spin_lock(&sound_loader_lock);
                 s = __look_for_unit(chain, unit);
                 if (s)