/* * Linux driver for TerraTec DMX 6Fire USB * * Main routines and module definitions. * * Author: Torsten Schenk * Created: Jan 01, 2011 * Copyright: (C) Torsten Schenk * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. */ #include "chip.h" #include "firmware.h" #include "pcm.h" #include "control.h" #include "comm.h" #include "midi.h" #include #include #include #include #include #include MODULE_AUTHOR("Torsten Schenk "); MODULE_DESCRIPTION("TerraTec DMX 6Fire USB audio driver"); MODULE_LICENSE("GPL v2"); MODULE_SUPPORTED_DEVICE("{{TerraTec,DMX 6Fire USB}}"); static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-max */ static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* Id for card */ static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; /* Enable card */ static struct sfire_chip *chips[SNDRV_CARDS] = SNDRV_DEFAULT_PTR; static struct usb_device *devices[SNDRV_CARDS] = SNDRV_DEFAULT_PTR; module_param_array(index, int, NULL, 0444); MODULE_PARM_DESC(index, "Index value for the 6fire sound device"); module_param_array(id, charp, NULL, 0444); MODULE_PARM_DESC(id, "ID string for the 6fire sound device."); module_param_array(enable, bool, NULL, 0444); MODULE_PARM_DESC(enable, "Enable the 6fire sound device."); static DEFINE_MUTEX(register_mutex); static void usb6fire_chip_abort(struct sfire_chip *chip) { if (chip) { if (chip->pcm) usb6fire_pcm_abort(chip); if (chip->midi) usb6fire_midi_abort(chip); if (chip->comm) usb6fire_comm_abort(chip); if (chip->control) usb6fire_control_abort(chip); if (chip->card) { snd_card_disconnect(chip->card); snd_card_free_when_closed(chip->card); chip->card = NULL; } } } static void usb6fire_chip_destroy(struct sfire_chip *chip) { if (chip) { if (chip->pcm) usb6fire_pcm_destroy(chip); if (chip->midi) usb6fire_midi_destroy(chip); if (chip->comm) usb6fire_comm_destroy(chip); if (chip->control) usb6fire_control_destroy(chip); if (chip->card) snd_card_free(chip->card); } } static int usb6fire_chip_probe(struct usb_interface *intf, const struct usb_device_id *usb_id) { int ret; int i; struct sfire_chip *chip = NULL; struct usb_device *device = interface_to_usbdev(intf); int regidx = -1; /* index in module parameter array */ struct snd_card *card = NULL; /* look if we already serve this card and return if so */ mutex_lock(®ister_mutex); for (i = 0; i < SNDRV_CARDS; i++) { if (devices[i] == device) { if (chips[i]) chips[i]->intf_count++; usb_set_intfdata(intf, chips[i]); mutex_unlock(®ister_mutex); return 0; } else if (!devices[i] && regidx < 0) regidx = i; } if (regidx < 0) { mutex_unlock(®ister_mutex); dev_err(&intf->dev, "too many cards registered.\n"); return -ENODEV; } devices[regidx] = device; mutex_unlock(®ister_mutex); /* check, if firmware is present on device, upload it if not */ ret = usb6fire_fw_init(intf); if (ret < 0) return ret; else if (ret == FW_NOT_READY) /* firmware update performed */ return 0; /* if we are here, card can be registered in alsa. */ if (usb_set_interface(device, 0, 0) != 0) { dev_err(&intf->dev, "can't set first interface.\n"); return -EIO; } ret = snd_card_new(&intf->dev, index[regidx], id[regidx], THIS_MODULE, sizeof(struct sfire_chip), &card); if (ret < 0) { dev_err(&intf->dev, "cannot create alsa card.\n"); return ret; } strcpy(card->driver, "6FireUSB"); strcpy(card->shortname, "TerraTec DMX6FireUSB"); sprintf(card->longname, "%s at %d:%d", card->shortname, device->bus->busnum, device->devnum); chip = card->private_data; chips[regidx] = chip; chip->dev = device; chip->regidx = regidx; chip->intf_count = 1; chip->card = card; ret = usb6fire_comm_init(chip); if (ret < 0) { usb6fire_chip_destroy(chip); return ret; } ret = usb6fire_midi_init(chip); if (ret < 0) { usb6fire_chip_destroy(chip); return ret; } ret = usb6fire_pcm_init(chip); if (ret < 0) { usb6fire_chip_destroy(chip); return ret; } ret = usb6fire_control_init(chip); if (ret < 0) { usb6fire_chip_destroy(chip); return ret; } ret = snd_card_register(card); if (ret < 0) { dev_err(&intf->dev, "cannot register card."); usb6fire_chip_destroy(chip); return ret; } usb_set_intfdata(intf, chip); return 0; } static void usb6fire_chip_disconnect(struct usb_interface *intf) { struct sfire_chip *chip; struct snd_card *card; chip = usb_get_intfdata(intf); if (chip) { /* if !chip, fw upload has been performed */ card = chip->card; chip->intf_count--; if (!chip->intf_count) { mutex_lock(®ister_mutex); devices[chip->regidx] = NULL; chips[chip->regidx] = NULL; mutex_unlock(®ister_mutex); chip->shutdown = true; usb6fire_chip_abort(chip); usb6fire_chip_destroy(chip); } } } static struct usb_device_id device_table[] = { { .match_flags = USB_DEVICE_ID_MATCH_DEVICE, .idVendor = 0x0ccd, .idProduct = 0x0080 }, {} }; MODULE_DEVICE_TABLE(usb, device_table); static struct usb_driver usb_driver = { .name = "snd-usb-6fire", .probe = usb6fire_chip_probe, .disconnect = usb6fire_chip_disconnect, .id_table = device_table, }; module_usb_driver(usb_driver); 1f31f98194e4f6b6cae7'>79c6f448c8b79c321e4a1f31f98194e4f6b6cae7 (patch) tree370efda701f03cccf21e02bb1fdd3b852547d75c /sound/firewire/digi00x/digi00x.h parent0c744ea4f77d72b3dcebb7a8f2684633ec79be88 (diff)
tracing: Fix hwlat kthread migration
The hwlat tracer creates a kernel thread at start of the tracer. It is pinned to a single CPU and will move to the next CPU after each period of running. If the user modifies the migration thread's affinity, it will not change after that happens. The original code created the thread at the first instance it was called, but later was changed to destroy the thread after the tracer was finished, and would not be created until the next instance of the tracer was established. The code that initialized the affinity was only called on the initial instantiation of the tracer. After that, it was not initialized, and the previous affinity did not match the current newly created one, making it appear that the user modified the thread's affinity when it did not, and the thread failed to migrate again. Cc: stable@vger.kernel.org Fixes: 0330f7aa8ee6 ("tracing: Have hwlat trace migrate across tracing_cpumask CPUs") Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'sound/firewire/digi00x/digi00x.h')