linux.git/include/sound/core.h, branch v4.4

ALSA: core: Remove superfluous exit calls for proc entries

2015-04-24T15:31:04+00:00

Since each proc entry is freed automatically by the parent, we don't
have to take care of its life cycle any longer.  This allows us to
reduce a few more lines of codes.

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

ALSA: core: Re-add snd_device_disconnect()

2015-03-03T10:26:28+00:00

Revive snd_device_disconnect() again so that it can be called from the
individual driver.  This time, HD-audio will need it.

Signed-off-by: Takashi Iwai

ALSA: Add a helper to add a new attribute group to card

2015-02-06T08:56:33+00:00

For assigning sysfs entries for a card device from the driver,
introduce a new helper function, snd_card_add_dev_attr().  In this
way, we can avoid the possible race between the device registration
and the sysfs addition / removal.

The driver can pass a new attribute group to add freely.  This has to
be called before snd_card_register().

Currently, up to two extra groups can be added.  More than that, it'll
return an error.

Signed-off-by: Takashi Iwai

ALSA: Drop snd_get_device() helper

2015-02-02T16:01:38+00:00

Since the device is no longer hidden but embedded into each component,
we no longer need snd_get_device().  Let's drop it and relevant codes.

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

ALSA: Simplify snd_device_register() variants

2015-02-02T16:01:26+00:00

Now that all callers have been replaced with
snd_device_register_for_dev(), let's drop the obsolete device
registration code and concentrate only on the code handling struct
device directly.  That said,

- remove the old snd_device_register(),
- rename snd_device_register_for_dev() with snd_device_register(),
- drop superfluous arguments from snd_device_register(),
- change snd_unregister_device() to pass the device pointer directly

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

ALSA: control: Embed struct device

2015-02-02T13:42:41+00:00

This patch embeds a struct device for the control device into the card
object and avoid the device creation at registration time.

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

ALSA: Add a helper to initialize device

2015-02-02T13:42:33+00:00

Introduce a new helper function snd_device_initialize() to initialize
the device object for sound devices.

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

ALSA: Allow to pass the device object to snd_register_device*()

2015-02-02T13:21:07+00:00

This is a preliminary patch for the further work on embedding struct
device into each sound device instance.  It changes
snd_register_device*() helpers to receive the device object directly
for skipping creating a device there.

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

ALSA: control: Protect user controls against concurrent access

2014-06-18T13:12:33+00:00

The user-control put and get handlers as well as the tlv do not protect against
concurrent access from multiple threads. Since the state of the control is not
updated atomically it is possible that either two write operations or a write
and a read operation race against each other. Both can lead to arbitrary memory
disclosure. This patch introduces a new lock that protects user-controls from
concurrent access. Since applications typically access controls sequentially
than in parallel a single lock per card should be fine.

Signed-off-by: Lars-Peter Clausen 
Acked-by: Jaroslav Kysela 
Cc: 
Signed-off-by: Takashi Iwai

ALSA: Remove deprecated snd_card_create()

2014-05-23T07:57:55+00:00

Now all calls have been fixed, let's get rid of the old definition.

Signed-off-by: Takashi Iwai