linux-toradex.git/sound/core/seq/seq_device.c, branch v4.0

Subject: ALSA: seq: Remove autoload locks in driver registration

2014-10-18T18:25:19+00:00

Since we're calling request_module() asynchronously now, we can get
rid of the autoload lock in snd_seq_device_register_driver(), as well
as in the snd-seq driver registration itself.  This enables the
automatic loading of dependent sequencer modules, such as
snd-seq-virmidi from snd-emu10k1-synth.

Signed-off-by: Takashi Iwai

ALSA: seq: bind seq driver automatically

2014-10-18T18:25:12+00:00

Currently the sequencer module binding is performed independently from
the card module itself.  The reason behind it is to keep the sequencer
stuff optional and allow the system running without it (e.g. for using
PCM or rawmidi only).  This works in most cases, but a remaining
problem is that the binding isn't done automatically when a new driver
module is probed.  Typically this becomes visible when a hotplug
driver like usb audio is used.

This patch tries to address this and other potential issues.  First,
the seq-binder (seq_device.c) tries to load a missing driver module at
creating a new device object.  This is done asynchronously in a workq
for avoiding the deadlock (modprobe call in module init path).

This action, however, should be enabled only when the sequencer stuff
was already initialized, i.e. snd-seq module was already loaded.  For
that, a new function, snd_seq_autoload_init() is introduced here; this
clears the blocking of autoloading, and also tries to load all pending
driver modules.

Reported-by: Adam Goode 
Signed-off-by: Takashi Iwai

ALSA: seq: Use atomic ops for autoload refcount

2014-10-15T12:00:16+00:00

... just to robustify for races.

Signed-off-by: Takashi Iwai

ALSA: seq: Use standard printk helpers

2014-02-14T07:14:18+00:00

Use the standard pr_xxx() helpers instead of home-baked snd_print*().

Signed-off-by: Takashi Iwai

ALSA: core: Use standard printk helpers

2014-02-14T07:14:15+00:00

Use dev_err() & co as much as possible.  If not available (no device
assigned at the calling point), use pr_xxx() helpers instead.

Signed-off-by: Takashi Iwai

various: Fix spelling of "registered" in comments.

2012-11-19T13:29:46+00:00

Some comments misspell "registered"; this fixes them. No code changes.

Signed-off-by: Adam Buchbinder 
Signed-off-by: Jiri Kosina

ALSA: lto, sound: Fix export symbols for !CONFIG_MODULES

2012-08-20T09:53:10+00:00

The new LTO EXPORT_SYMBOL references symbols even without CONFIG_MODULES.
Since these functions are macros in this case this doesn't work.
Add a ifdef to fix the build.

Signed-off-by: Andi Kleen 
Signed-off-by: Takashi Iwai

sound: Add module.h to the previously silent sound users

2011-10-31T23:31:21+00:00

Lots of sound drivers were getting module.h via the implicit presence
of it in  but we are going to clean that up.  So
fix up those users now.

Signed-off-by: Paul Gortmaker

ALSA: Kill snd_assert() in sound/core/*

2008-08-13T09:46:35+00:00

Kill snd_assert() in sound/core/*, either removed or replaced with
if () with snd_BUG_ON().

Signed-off-by: Takashi Iwai 
Signed-off-by: Jaroslav Kysela

ALSA: remove CONFIG_KMOD from sound

2008-07-10T07:32:58+00:00

A bunch of things in alsa depend on CONFIG_KMOD,
use CONFIG_MODULES instead where the dependency
is needed at all.

Signed-off-by: Johannes Berg 
Signed-off-by: Takashi Iwai 
Signed-off-by: Jaroslav Kysela