/* * tascam-midi.c - a part of driver for TASCAM FireWire series * * Copyright (c) 2015 Takashi Sakamoto * * Licensed under the terms of the GNU General Public License, version 2. */ #include "tascam.h" static int midi_capture_open(struct snd_rawmidi_substream *substream) { /* Do nothing. */ return 0; } static int midi_playback_open(struct snd_rawmidi_substream *substream) { struct snd_tscm *tscm = substream->rmidi->private_data; /* Initialize internal status. */ tscm->running_status[substream->number] = 0; tscm->on_sysex[substream->number] = 0; return 0; } static int midi_capture_close(struct snd_rawmidi_substream *substream) { /* Do nothing. */ return 0; } static int midi_playback_close(struct snd_rawmidi_substream *substream) { struct snd_tscm *tscm = substream->rmidi->private_data; snd_fw_async_midi_port_finish(&tscm->out_ports[substream->number]); return 0; } static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up) { struct snd_tscm *tscm = substrm->rmidi->private_data; unsigned long flags; spin_lock_irqsave(&tscm->lock, flags); if (up) tscm->tx_midi_substreams[substrm->number] = substrm; else tscm->tx_midi_substreams[substrm->number] = NULL; spin_unlock_irqrestore(&tscm->lock, flags); } static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up) { struct snd_tscm *tscm = substrm->rmidi->private_data; unsigned long flags; spin_lock_irqsave(&tscm->lock, flags); if (up) snd_fw_async_midi_port_run(&tscm->out_ports[substrm->number], substrm); spin_unlock_irqrestore(&tscm->lock, flags); } static struct snd_rawmidi_ops midi_capture_ops = { .open = midi_capture_open, .close = midi_capture_close, .trigger = midi_capture_trigger, }; static struct snd_rawmidi_ops midi_playback_ops = { .open = midi_playback_open, .close = midi_playback_close, .trigger = midi_playback_trigger, }; int snd_tscm_create_midi_devices(struct snd_tscm *tscm) { struct snd_rawmidi *rmidi; struct snd_rawmidi_str *stream; struct snd_rawmidi_substream *subs; int err; err = snd_rawmidi_new(tscm->card, tscm->card->driver, 0, tscm->spec->midi_playback_ports, tscm->spec->midi_capture_ports, &rmidi); if (err < 0) return err; snprintf(rmidi->name, sizeof(rmidi->name), "%s MIDI", tscm->card->shortname); rmidi->private_data = tscm; rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT; snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &midi_capture_ops); stream = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]; /* Set port names for MIDI input. */ list_for_each_entry(subs, &stream->substreams, list) { /* TODO: support virtual MIDI ports. */ if (subs->number < tscm->spec->midi_capture_ports) { /* Hardware MIDI ports. */ snprintf(subs->name, sizeof(subs->name), "%s MIDI %d", tscm->card->shortname, subs->number + 1); } } rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT; snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &midi_playback_ops); stream = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]; /* Set port names for MIDI ourput. */ list_for_each_entry(subs, &stream->substreams, list) { if (subs->number < tscm->spec->midi_playback_ports) { /* Hardware MIDI ports only. */ snprintf(subs->name, sizeof(subs->name), "%s MIDI %d", tscm->card->shortname, subs->number + 1); } } rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX; return 0; } ='label'>context:space:mode:
authorDexuan Cui <decui@microsoft.com>2017-01-28 11:46:02 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-01-31 10:59:48 +0100
commit433e19cf33d34bb6751c874a9c00980552fe508c (patch)
treece6547ef2987fbb289fa28f03536328a42781651 /sound/soc/adi/axi-spdif.c
parent191e885a2e130e639bb0c8ee350d7047294f2ce6 (diff)
Drivers: hv: vmbus: finally fix hv_need_to_signal_on_read()
Commit a389fcfd2cb5 ("Drivers: hv: vmbus: Fix signaling logic in hv_need_to_signal_on_read()") added the proper mb(), but removed the test "prev_write_sz < pending_sz" when making the signal decision. As a result, the guest can signal the host unnecessarily, and then the host can throttle the guest because the host thinks the guest is buggy or malicious; finally the user running stress test can perceive intermittent freeze of the guest. This patch brings back the test, and properly handles the in-place consumption APIs used by NetVSC (see get_next_pkt_raw(), put_pkt_raw() and commit_rd_index()). Fixes: a389fcfd2cb5 ("Drivers: hv: vmbus: Fix signaling logic in hv_need_to_signal_on_read()") Signed-off-by: Dexuan Cui <decui@microsoft.com> Reported-by: Rolf Neugebauer <rolf.neugebauer@docker.com> Tested-by: Rolf Neugebauer <rolf.neugebauer@docker.com> Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: <stable@vger.kernel.org> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'sound/soc/adi/axi-spdif.c')