kernel.git/sound/core/init.c, branch linux-4.1.y

ALSA: core: Re-add snd_device_disconnect()

2015-03-03T10:26:28Z

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

2015-02-06T08:56:33Z

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: Add a helper to initialize device

2015-02-02T13:42:33Z

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: doc: More kerneldoc comments on core components

2014-10-30T14:42:32Z

Some functions missed the proper kerneldoc comments. Signed-off-by: Takashi Iwai

ALSA: control: Protect user controls against concurrent access

2014-06-18T13:12:33Z

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: Clean up snd_device_*() codes

2014-02-25T11:12:52Z

A few code cleanups and optimizations. In addition, drop snd_device_disconnect() that isn't used at all, and drop the return values from snd_device_free*(). Another slight difference by this change is that now the device state will become always SNDRV_DEV_REGISTERED no matter whether dev_register ops is present or not. It's for better consistency. There should be no impact for the current tree, as the state isn't checked. Signed-off-by: Takashi Iwai

ALSA: Use priority list for managing device list

2014-02-25T11:12:51Z

Basically, the device type specifies the priority of the device to be registered / freed, too. However, the priority value isn't well utilized but only it's checked as a group. This results in inconsistent register and free order (where each of them should be in reversed direction). This patch simplifies the device list management code by simply inserting a list entry at creation time in an incremental order for the priority value. Since we can just follow the link for register, disconnect and free calls, we don't have to specify the group; so the whole enum definitions are also simplified as well. The visible change to outside is that the priorities of some object types are revisited. For example, now the SNDRV_DEV_LOWLEVEL object is registered before others (control, PCM, etc) and, in return, released after others. Similarly, SNDRV_DEV_CODEC is in a lower priority than SNDRV_DEV_BUS for ensuring the dependency. Also, the unused SNDRV_DEV_TOPLEVEL, SNDRV_DEV_LOWLEVEL_PRE and SNDRV_DEV_LOWLEVEL_NORMAL are removed as a cleanup. Signed-off-by: Takashi Iwai

ALSA: core: Fix missing card sysfs contents

2014-02-19T10:20:32Z

While moving the card device into struct snd_card, the reference to the assigned card in sysfs show/store callbacks were forgotten to be refreshed, still accessing to the no longer used drvdata. Fix these places to refer correctly via container_of(). Also, remove the superfluous NULL checks since it's guaranteed to be non-NULL now. Fixes: 8bfb181c17d2 ('ALSA: Embed card device into struct snd_card') Signed-off-by: Takashi Iwai

ALSA: core: Use standard printk helpers

2014-02-14T07:14:15Z

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

ALSA: Use standard device refcount for card accounting

2014-02-14T07:14:13Z

Drop the own refcount but use the standard device refcounting via get_device() and put_device(). Introduce a new completion to snd_card instead of the wait queue for syncing the last release, which is used in snd_card_free(). Signed-off-by: Takashi Iwai