kernel/linux.git/sound/firewire/lib.c, branch v6.19.11

ALSA: firewire: use 'GPL' string for module license contributed by Clemens Ladisch

2023-06-12T12:39:00+00:00

In MODULE_LICENSE macro, "GPL" string obsoletes "GPL v2" string by a commit bf7fbeeae6db ("module: Cure the MODULE_LICENSE "GPL" vs. "GPL v2" bogosity"). This commit uses the preferable expression. Signed-off-by: Takashi Sakamoto Link: https://lore.kernel.org/r/20230611144445.221529-3-o-takashi@sakamocchi.jp Signed-off-by: Takashi Iwai

ALSA: firewire-lib: delete unused kernel API

2021-06-07T15:14:54+00:00

No driver use snd_fw_schedule_registration(). Let's delete it. Signed-off-by: Takashi Sakamoto Link: https://lore.kernel.org/r/20210607081250.13397-10-o-takashi@sakamocchi.jp Signed-off-by: Takashi Iwai

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 345

2019-06-05T15:37:08+00:00

Based on 1 normalized pattern(s): licensed under the terms of the gnu general public license version 2 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 88 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Alexios Zavras Reviewed-by: Allison Randal Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190530000437.521539229@linutronix.de Signed-off-by: Greg Kroah-Hartman

ALSA: firewire-lib/firewire-tascam: localize async midi port

2017-04-14T12:50:26+00:00

In Linux kernel 4.4, firewire-lib got a feature called as 'async midi port' for transmission of MIDI message via IEEE 1394 asynchronous communication, however actual consumer of this feature is ALSA driver for TASCAM FireWire series only. When adding this feature, I assumed that ALSA driver for Digi00x might also be a consumer, actually it's not. This commit moves the feature from firewire-lib to firewire-tascam module. Two minor kernel APIs are removed. Signed-off-by: Takashi Sakamoto Signed-off-by: Takashi Iwai

ktime: Cleanup ktime_set() usage

2016-12-25T16:21:22+00:00

ktime_set(S,N) was required for the timespec storage type and is still useful for situations where a Seconds and Nanoseconds part of a time value needs to be converted. For anything where the Seconds argument is 0, this is pointless and can be replaced with a simple assignment. Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra

ALSA: firewire-lib: add new function to schedule a work for sound card registration

2016-03-31T13:36:18+00:00

In former commit, ALSA dice driver postpone sound card registration after IEEE 1394 bus is calm. This idea has advantages for the other drivers. This commit adds a helper function for it to firewire-lib module. The function is really for the specific purpose. Callers should initialize delayed work structure with callback function. Signed-off-by: Takashi Sakamoto Signed-off-by: Takashi Iwai

ALSA: firewire-lib: avoid NULL pointer dereference after closing MIDI port

2015-10-19T09:58:21+00:00

When asynchronous MIDI port is closed before callbacked, the callback function causes NULL pointer dereference to missing MIDI substream. This commit fixes this bug. Fixes: e8a40d9bcb23('ALSA: firewire-lib: schedule work again when MIDI substream has rest of MIDI messages') Reported-by: Dan Carpenter Signed-off-by: Takashi Sakamoto Signed-off-by: Takashi Iwai

ALSA: firewire-lib: avoid endless loop to transfer MIDI messages at fatal error

2015-10-09T07:57:06+00:00

Currently, when asynchronous transactions finish in error state and retries, work scheduling and work running also continues. This should be canceled at fatal error because it can cause endless loop. This commit enables to cancel transferring MIDI messages when transactions encounter fatal errors. This is achieved by setting error state. Signed-off-by: Takashi Sakamoto Signed-off-by: Takashi Iwai

ALSA: firewire-lib: add throttle for MIDI data rate

2015-10-09T07:57:06+00:00

Typically, the target devices have internal buffer to adjust output of received MIDI messages for MIDI serial bus, while the capacity of the buffer is limited. IEEE 1394 transactions can transfer more MIDI messages than MIDI serial bus can. This can cause buffer over flow in device side. This commit adds throttle to limit MIDI data rate by counting intervals between two MIDI messages. Usual MIDI messages consists of two or three bytes. This requires 1.302 to 1.953 mili-seconds interval between these messages. This commit uses kernel monotonic time service to calculate the time of next transaction. Signed-off-by: Takashi Sakamoto Signed-off-by: Takashi Iwai

ALSA: firewire-lib: schedule work again when MIDI substream has rest of MIDI messages

2015-10-09T07:57:05+00:00

Currently, when two MIDI trigger callbacks can be called immediately, transactions for the second MIDI messages can be postpone till next trigger callback. This is not good for real-time message transmission. This commit schedules work again at response handling callback if the MIDI substream still includes untransferred MIDI messages. Signed-off-by: Takashi Sakamoto Signed-off-by: Takashi Iwai