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linux/sound/usb
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Linus Torvalds 4b820e167b Revert "ALSA: usb-audio: Reduce latency at playback start" 
This reverts commit 9ce650a75a.

This commit causes watchdog lockups on my machine, and while I have no
idea what the cause is, it bisected right to this commit, and reverting
the change promptly fixes it.

At least occasionally one of the watchdog call traces was

  Call Trace:
    _raw_spin_lock_irqsave+0x35/0x40
    snd_pcm_period_elapsed+0x1b/0xa0 [snd_pcm]
    snd_usb_endpoint_start+0x1a0/0x3c0 [snd_usb_audio]
    start_endpoints+0x23/0x90 [snd_usb_audio]
    snd_usb_substream_playback_trigger+0x7b/0x1a0 [snd_usb_audio]
    snd_pcm_common_ioctl+0x1c44/0x2360 [snd_pcm]
    snd_pcm_ioctl+0x2e/0x40 [snd_pcm]
    __se_sys_ioctl+0x72/0xc0
    do_syscall_64+0x4c/0xa0
    entry_SYSCALL_64_after_hwframe+0x44/0xae

so presumably it's a locking error on that substream spinlock that
snd_pcm_period_elapsed() takes.  But at this point I just want to have a
working system so that I can continue the merge window work tomorrow.

Cc: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-07-02 22:05:52 -07:00
..
6fire module: remove never implemented MODULE_SUPPORTED_DEVICE 2021-03-17 13:16:18 -07:00
bcd2000 ALSA: Convert strlcpy to strscpy when return value is unused 2021-01-08 09:30:05 +01:00
caiaq module: remove never implemented MODULE_SUPPORTED_DEVICE 2021-03-17 13:16:18 -07:00
hiface module: remove never implemented MODULE_SUPPORTED_DEVICE 2021-03-17 13:16:18 -07:00
line6 ALSA: line6: Fix racy initialization of LINE6 MIDI 2021-05-19 16:25:57 +02:00
misc module: remove never implemented MODULE_SUPPORTED_DEVICE 2021-03-17 13:16:18 -07:00
usx2y Merge branch 'topic/pci-rescan-prep-v2' into for-next 2021-05-25 08:50:03 +02:00
card.c ALSA: usb-audio: Skip probe of UA-101 devices 2021-04-09 09:57:30 +02:00
card.h ALSA: usb-audio: Refactoring delay account code 2021-06-02 09:01:44 +02:00
clock.c ALSA: usb-audio: Add support for Denon DN-X1600 2021-06-10 10:38:33 +02:00
clock.h ALSA: usb-audio: Constify audioformat pointer references 2020-11-23 15:15:36 +01:00
endpoint.c ALSA: usb-audio: Refactoring delay account code 2021-06-02 09:01:44 +02:00
endpoint.h ALSA: usb-audio: Remove the repeated declaration 2021-05-30 09:30:46 +02:00
format.c ALSA: usb-audio: fix rate on Ozone Z90 USB headset 2021-06-17 11:38:46 +02:00
format.h ALSA: usb: initial USB Audio Device Class 3.0 support 2018-03-21 11:46:33 +01:00
helper.c ALSA: usb-audio: Add snd_usb_get_host_interface() helper 2020-11-23 15:13:47 +01:00
helper.h ALSA: usb-audio: Add snd_usb_get_host_interface() helper 2020-11-23 15:13:47 +01:00
implicit.c ALSA: usb-audio: Generic application of implicit fb to Roland/BOSS devices 2021-04-22 18:19:47 +02:00
implicit.h ALSA: usb-audio: Factor out the implicit feedback quirk code 2020-11-23 15:17:00 +01:00
Kconfig sound: Fix Kconfig indentation 2019-10-07 03:53:03 +02:00
Makefile ALSA: usb-audio: Factor out the implicit feedback quirk code 2020-11-23 15:17:00 +01:00
media.c media: sound/usb: Use Media Controller API to share media resources 2019-04-22 11:21:06 -04:00
media.h media: sound/usb: Use Media Controller API to share media resources 2019-04-22 11:21:06 -04:00
midi.c ALSA: usb-audio: Fix potential out-of-bounce access in MIDI EP parser 2021-05-11 11:10:37 +02:00
midi.h ALSA: usb-audio: generate midi streaming substream names from jack names 2021-03-01 09:21:54 +01:00
mixer_maps.c ALSA: usb-audio: Add dB range mapping for Sennheiser Communications Headset PC 8 2021-05-03 13:35:58 +02:00
mixer_quirks.c ALSA: usb-audio: scarlett2: Add support for Solo and 2i2 Gen 3 2021-06-22 21:42:24 +02:00
mixer_quirks.h ALSA: usb-audio: Initialize Dell Dock playback volumes 2018-05-02 16:02:32 +02:00
mixer_s1810c.c ALSA: usb-audio: Fix some typos 2020-06-30 19:48:18 +02:00
mixer_s1810c.h ALSA: usb-audio: Add support for Presonus Studio 1810c 2020-02-15 09:46:16 +01:00
mixer_scarlett_gen2.c ALSA: usb-audio: scarlett2: Fix for loop increment in scarlett2_usb_get_config 2021-07-01 19:11:30 +02:00
mixer_scarlett_gen2.h ALSA: usb-audio: scarlett2: Improve driver startup messages 2021-05-21 16:22:52 +02:00
mixer_scarlett.c ALSA: Convert strlcpy to strscpy when return value is unused 2021-01-08 09:30:05 +01:00
mixer_scarlett.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mixer_us16x08.c ALSA: Convert strlcpy to strscpy when return value is unused 2021-01-08 09:30:05 +01:00
mixer_us16x08.h ALSA: usb: Constify snd_kcontrol_new items 2020-01-03 09:24:34 +01:00
mixer.c ALSA: usb-audio: scarlett2: Fix wrong resume call 2021-06-22 21:39:19 +02:00
mixer.h ALSA: usb-audio: scarlett2: Fix wrong resume call 2021-06-22 21:39:19 +02:00
pcm.c Revert "ALSA: usb-audio: Reduce latency at playback start" 2021-07-02 22:05:52 -07:00
pcm.h ALSA: usb-audio: Make snd_usb_pcm_delay() static 2021-06-02 09:01:17 +02:00
power.c ALSA: usb-audio: More validations of descriptor units 2019-08-22 10:35:59 +02:00
power.h ALSA: usb-audio: Initial Power Domain support 2018-07-31 15:01:22 +02:00
proc.c ALSA: usb-audio: Show sync endpoint information in proc outputs 2020-11-23 15:16:45 +01:00
proc.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
quirks-table.h ALSA: usb-audio: Add support for Denon DN-X1600 2021-06-10 10:38:33 +02:00
quirks.c ALSA: usb-audio: DJM-750: ensure format is set 2021-04-19 09:42:35 +02:00
quirks.h ALSA: usb-audio: Constify audioformat pointer references 2020-11-23 15:15:36 +01:00
stream.c Merge branch 'for-linus' into for-next 2020-12-14 09:05:29 +01:00
stream.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
usbaudio.h ALSA: usb-audio: Apply implicit feedback mode for BOSS devices 2021-04-14 14:24:22 +02:00
validate.c ALSA: usb-audio: Fix endianess in descriptor validation 2020-02-01 09:06:11 +01:00