leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity
57e69e2f06
linux/sound/pci
History
Takashi Iwai 9780ded39b ALSA: hda: Avoid racy recreation of widget kobjects 
The refresh of HD-audio widget sysfs kobjects via
snd_hdac_refresh_widget_sysfs() is slightly racy.
The driver recreates the whole tree from scratch after deleting the
whole.  When CONFIG_DEBUG_KOBJECT_RELEASE option is used, kobject
release doesn't happen immediately but delayed, while the re-creation
of the same named kobject happens soon after invoking kobject_put().
This may end up with the conflicts of duplicated kobjects, as found in
the bug report below.

In this patch, we take another approach to refresh the tree: instead
of recreating the whole tree, just add the new nodes and delete the
non-existing nodes.  Since the refresh happens only once at
initialization, no longer race would happen.

Along with the code change, merge snd_hdac_refresh_widget_sysfs() with
the existing snd_hdac_refresh_widgets() with an additional bool flag
for simplifying the code.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=197307
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-10-19 13:58:36 +02:00
..
ac97 scripts/spelling.txt: add "swith" pattern and fix typo instances 2017-02-27 18:43:46 -08:00
ali5451 ALSA: ali5451: constify snd_pcm_ops structures 2017-08-10 17:56:04 +02:00
asihpi ALSA: asihpi: clean up a couple of build warnings 2017-10-16 14:48:11 +02:00
au88x0 ALSA: au88x0: remove redundant assignment of variable i 2017-10-17 14:14:04 +02:00
aw2 ALSA: aw2: make snd_pcm_hardware const 2017-08-12 23:31:39 +02:00
ca0106 ALSA: ca0106: Delete an error message for a failed memory allocation in snd_ca0106_pcm_open_capture_channel() 2017-08-12 23:33:54 +02:00
cs46xx ALSA: cs46xx: make snd_pcm_hardware const 2017-08-12 23:31:41 +02:00
cs5535audio ALSA: cs5535audio: make snd_pcm_hardware const 2017-08-12 23:31:44 +02:00
ctxfi ALSA: ctxfi: Remove null check before kfree 2017-08-31 20:10:30 +02:00
echoaudio Revert "ALSA: echoaudio: purge contradictions between dimension matrix members and total number of members" 2017-10-02 14:30:43 +02:00
emu10k1 ALSA: emu10k1: remove redundant assignment to tmp 2017-10-17 19:15:45 +02:00
hda ALSA: hda: Avoid racy recreation of widget kobjects 2017-10-19 13:58:36 +02:00
ice1712 ALSA: ice1712: Add support for STAudio ADCIII 2017-08-22 16:58:59 +02:00
korg1212 ALSA: korg1212: make snd_pcm_hardware const 2017-08-12 23:31:42 +02:00
lola ALSA: lola: make snd_pcm_hardware const 2017-08-12 23:31:46 +02:00
lx6464es ALSA: lx6464es: make snd_pcm_hardware const 2017-08-12 23:31:48 +02:00
mixart ALSA: mixart: Delete an error message for a failed memory allocation in snd_mixart_create() 2017-08-12 23:33:20 +02:00
nm256 ALSA: nm256: constify snd_ac97_res_table 2017-08-24 09:13:43 +02:00
oxygen ALSA: oxygen: Xonar DG(X): make model_xonar_dg const 2017-09-18 15:48:25 +02:00
pcxhr ALSA: pcxhr: make snd_kcontrol_new const 2017-08-16 14:29:07 +02:00
riptide ALSA: riptide: make snd_pcm_hardware const 2017-08-12 23:31:53 +02:00
rme9652 ALSA: hdspm: Use common error handling code in snd_hdspm_probe() 2017-09-07 10:26:19 +02:00
trident ALSA: trident: make snd_pcm_hardware const 2017-08-12 23:31:55 +02:00
vx222 ALSA: vx222: Use container_of() 2017-05-15 11:21:05 +02:00
ymfpci ALSA: ymfpci: Use common error handling code in snd_ymfpci_create() 2017-09-07 10:33:28 +02:00
ad1889.c ALSA: pci: make snd_pcm_hardware const 2017-08-12 23:31:58 +02:00
ad1889.h
ak4531_codec.c ALSA: pci: Drop superfluous ifdef CONFIG_PROC_FS 2015-05-29 08:00:06 +02:00
als300.c ALSA: pci: make snd_pcm_hardware const 2017-08-12 23:31:58 +02:00
als4000.c ALSA: pci: make snd_pcm_hardware const 2017-08-12 23:31:58 +02:00
atiixp_modem.c ALSA: pci: make snd_pcm_hardware const 2017-08-12 23:31:58 +02:00
atiixp.c ALSA: atiixp: constify ac97_pcm structures 2017-08-23 15:53:39 +02:00
azt3328.c ALSA: azt3328: Constify hw_constraints 2017-06-09 10:42:49 +02:00
azt3328.h
bt87x.c ALSA: pci: make snd_pcm_hardware const 2017-08-12 23:31:58 +02:00
cmipci.c ALSA: cmipci: Use common error handling code in snd_cmipci_probe() 2017-08-22 20:06:10 +02:00
cs4281.c ALSA: pci: make snd_pcm_hardware const 2017-08-12 23:31:58 +02:00
cs5530.c ASoC: sb16: Simplify snd_sb16dsp_pcm() 2015-01-02 16:28:35 +01:00
ens1370.c ALSA: ens137x: remove redundant variable result 2017-10-16 13:36:24 +02:00
ens1371.c
es1938.c ALSA: pci: make snd_pcm_hardware const 2017-08-12 23:31:58 +02:00
es1968.c ALSA: pci: make snd_pcm_hardware const 2017-08-12 23:31:58 +02:00
fm801.c ALSA: pci: make snd_pcm_hardware const 2017-08-12 23:31:58 +02:00
intel8x0.c ALSA: intel8x0: constify ac97_pcm structures 2017-08-23 15:53:40 +02:00
intel8x0m.c ALSA: pci: make snd_pcm_hardware const 2017-08-12 23:31:58 +02:00
Kconfig ALSA: seq: Allow the modular sequencer registration 2017-06-12 08:43:33 +02:00
maestro3.c ALSA: maestro3: Use common error handling code in two functions 2017-09-07 10:23:47 +02:00
Makefile
rme32.c ALSA: pci: make snd_pcm_hardware const 2017-08-12 23:31:58 +02:00
rme96.c ALSA: pci: make snd_pcm_hardware const 2017-08-12 23:31:58 +02:00
sis7019.c ALSA: pci: make snd_pcm_hardware const 2017-08-12 23:31:58 +02:00
sis7019.h
sonicvibes.c ALSA: pci: make snd_pcm_hardware const 2017-08-12 23:31:58 +02:00
via82xx_modem.c ALSA: pci: make snd_pcm_hardware const 2017-08-12 23:31:58 +02:00
via82xx.c ALSA: pci: make snd_pcm_hardware const 2017-08-12 23:31:58 +02:00