linux.git/sound/core/init.c, branch v4.6.3

ALSA: hda_intel: add card number to irq description

2016-01-12T20:05:16+00:00

Currently the info in /proc/interrupts doesn't allow to figure out which
interrupt belongs to which card (HDMI, PCH, ..).
Therefore add card details to the interrupt description.
With the patch the info in /proc/interrupts looks like this:

PCI-MSI 442368-edge      snd_hda_intel:card1
PCI-MSI 49152-edge      snd_hda_intel:card0

NOTE: this patch adds the new irq_descr field snd_card struct that is
filled automatically at a card object creation.  This can be used
generically for other drivers as well.  The changes for others will
follow later -- tiwai

Signed-off-by: Heiner Kallweit 
Signed-off-by: Takashi Iwai

ALSA: Fix uninintialized error return

2015-06-29T17:08:31+00:00

Static analysis with cppcheck found the following error:
  [sound/core/init.c:118]: (error) Uninitialized variable: err

..this was introduced by commit 2471b6c80a70e80de69f5ff4c37187c3912e5874
("ALSA: info: Register proc entries recursively, too") where the call
to snd_info_card_register was removed and no longer setting the error
return in err.  When snd_info_create_card_entry fails to allocate a
an entry, the error path exits with garbage in err.  Fix is to return
-ENOMEM if entry fails to be allocated.

Fixes: 2471b6c80a ("ALSA: info: Register proc entries recursively, too")
Signed-off-by: Colin Ian King 
Signed-off-by: Takashi Iwai

ALSA: replace CONFIG_PROC_FS with CONFIG_SND_PROC_FS

2015-05-27T19:25:19+00:00

We may disable proc fs only for sound part, to reduce ALSA
memory footprint. So add CONFIG_SND_PROC_FS and replace the
old CONFIG_PROC_FSs in alsa code.

With sound proc fs disabled, we can save about 9KB memory
size on X86_64 platform.

Signed-off-by: Jie Yang 
Reviewed-by: Mark Brown 
Signed-off-by: Takashi Iwai

ALSA: info: Register proc entries recursively, too

2015-05-18T07:20:24+00:00

The commit [c560a6797e3b: ALSA: core: Remove child proc file elements
recursively] converted snd_card_proc_new() with the normal
snd_info_*() call and removed snd_device chain for such info
entries. However, it misses one point: the creation of the proc entry
was managed by snd_device chain in the former code, and now it's also
gone, which results in no proc files creation at all.  Mea culpa.

This patch makes snd_info_card_register() creating the all pending
child proc entries in a shot.  Also, since snd_card_register() might
be called multiple times, this function is also changed to be callable
multiple times.

Along with the changes above, now the linked list of snd_info_entry is
added at creation time instead of snd_info_register() for keeping eyes
of pending info entries.

Fixes: c560a6797e3b ('ALSA: core: Remove child proc file elements recursively')
Reported-by: "Lu, Han" 
Signed-off-by: Takashi Iwai

ALSA: core: Don't ignore errors at creating proc files

2015-04-24T15:31:06+00:00

So far we've ignored the errors at creating proc files in many places.
But they should be rather treated seriously.

Also, by assuring the error handling, we can get rid of superfluous
snd_info_free_entry() calls as they will be removed by the parent in
the caller side.

This patch fixes the missing error checks and reduces the superfluous
free calls.

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

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: 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: doc: More kerneldoc comments on core components

2014-10-30T14:42:32+00:00

Some functions missed the proper kerneldoc comments.

Signed-off-by: Takashi Iwai