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  1. 28 Feb, 2017 1 commit
    • Takashi Iwai's avatar
      ALSA: timer: Reject user params with too small ticks · 71321eb3
      Takashi Iwai authored 
      When a user sets a too small ticks with a fine-grained timer like
hrtimer, the kernel tries to fire up the timer irq too frequently.
This may lead to the condensed locks, eventually the kernel spinlock
lockup with warnings.

For avoiding such a situation, we define a lower limit of the
resolution, namely 1ms.  When the user passes a too small tick value
that results in less than that, the kernel returns -EINVAL now.
Reported-by: default avatarDmitry Vyukov <dvyukov@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
      71321eb3
  3. 27 Feb, 2017 2 commits
  5. 25 Feb, 2017 1 commit
  7. 22 Feb, 2017 3 commits
    • Takashi Iwai's avatar
      ALSA: usb-audio: Tidy up mixer_us16x08.c · 7086b7b3
      Takashi Iwai authored 
      A few more cleanups and improvements that have been overlooked:

- Use ARRAY_SIZE() macro appropriately
- Code shuffling for minor optimization
- Omit superfluous variable initializations
- Get rid of superfluous NULL checks
- Add const to snd_us16x08_control_params definitions

No functional changes.
Reviewed-by: default avatarTakashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
      7086b7b3
    • Takashi Iwai's avatar
      ALSA: usb-audio: Fix memory leak and corruption in mixer_us16x08.c · e2810d76
      Takashi Iwai authored 
      There are a few places leaking memory and doing double-free in
mixer_us16x08.c.

The driver allocates a usb_mixer_elem_info object at each
add_new_ctl() call.  This has to be freed via kctl->private_free, but
currently this is done properly only for some controls.

Also, the driver allocates three external objects (comp_store,
eq_store, meter_store), and these are referred in elem->private_data
(it's not kctl->private_data).  And these have to be released, but
there are none doing it.  Moreover, these extra objects have to be
released only once.  Thus the release should be done only by the first
kctl element that refers to it.

For fixing these, we call either snd_usb_mixer_elem_free() (only for
kctl->private_data) or elem_private_free() (for both
kctl->private_data and elem->private_data) via kctl->private_free
appropriately.

Last but not least, snd_us16x08_controls_create() may return in the
middle without releasing the allocated *_store objects due to an
error.  For fixing this, we shuffle the allocation code so that it's
called just before its reference.

Fixes: d2bb390a ("ALSA: usb-audio: Tascam US-16x08 DSP mixer quirk")
Reported-by: default avatarTakashi Sakamoto <o-takashi@sakamocchi.jp>
Reviewed-by: default avatarTakashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
      e2810d76
    • Takashi Sakamoto's avatar
      ALSA: usb-audio: purge needless variable length array · 89b593c3
      Takashi Sakamoto authored 
      Variable length array is used in 'snd_us16x08_meter_get()', while there
is no need. It's better to purge it because variable length array has
overhead for stack handling.

This commit replaces the array with static length. Sparse generated below
warning.

sound/usb/mixer_us16x08.c:714:18: warning: Variable length array is used.

Fixes: d2bb390a ("ALSA: usb-audio: Tascam US-16x08 DSP mixer quirk")
Signed-off-by: default avatarTakashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
      89b593c3
  9. 21 Feb, 2017 3 commits
    • Arnd Bergmann's avatar
      ALSA: x86: hdmi: select CONFIG_SND_PCM · 4b49f0f7
      Arnd Bergmann authored 
      The newly added driver uses the PCM helpers and fails to link if they are disabled:

sound/built-in.o: In function `hdmi_lpe_audio_runtime_suspend':
intel_hdmi_audio.c:(.text+0x15906): undefined reference to `snd_pcm_suspend'
sound/built-in.o: In function `had_pcm_hw_params':
intel_hdmi_audio.c:(.text+0x15ac7): undefined reference to `snd_pcm_lib_malloc_pages'
sound/built-in.o: In function `had_pcm_open':
intel_hdmi_audio.c:(.text+0x15d49): undefined reference to `snd_pcm_hw_constraint_integer'

This uses a Kconfig 'select' statement to make sure they are enabled.

Fixes: 5dab11d8 ("ALSA: x86: hdmi: Add audio support for BYT and CHT")
Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
      4b49f0f7
    • Takashi Iwai's avatar
      ALSA: x86: Don't enable runtime PM as default · 0b6b524f
      Takashi Iwai authored 
      Unlike HSW and newer, BYT/CHT devices have no fine control of audio
power domain in i915 side.  Since there is little gain by runtime PM
on BYT/CHT, so far, this commit removes the pm_runtime_enable() call
as default.

User who still wants the runtime PM may adjust the corresponding
sysfs files (power/control and power/autosuspend_delay_ms)
appropriately, of course.
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
      0b6b524f
    • Takashi Iwai's avatar
      ALSA: x86: Use runtime PM autosuspend · 3002b9fb
      Takashi Iwai authored 
      This patch adds a few lines to the driver to use autosuspend for the
runtime PM.  It'll become useful with the combination of the keep-link
feature.
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
      3002b9fb
  11. 20 Feb, 2017 5 commits
  13. 19 Feb, 2017 23 commits
  15. 17 Feb, 2017 2 commits
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