From: Takashi Iwai Date: Mon, 19 Jan 2015 14:54:00 +0000 (+0100) Subject: ALSA: line6: Reorganize card resource handling X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=85a9339becf0af4d547ceb6bb16d1893b05fbce4;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git ALSA: line6: Reorganize card resource handling This is a fairly big rewrite regarding the card resource management in line6 drivers: - The card creation is moved into line6_probe(). This adds the global destructor to private_free, so that each driver doesn't have to call it any longer. - The USB disconnect callback handles the card release, thus each driver needs to concentrate on only its own resources. No need to snd_card_*() call in the destructor. - Fix the potential stall in disconnection by removing snd_card_free(). It's replaced with snd_card_free_when_closed() for asynchronous release. - The only remaining operation for the card in each driver is the call of snd_card_register(). All the rest are dealt in the common module by itself. - These ended up with removal of audio.[ch] as a result of a reduction of one layer. Each driver just needs to call line6_probe(). Tested-by: Chris Rorvick Signed-off-by: Takashi Iwai --- diff --git a/sound/usb/line6/Makefile b/sound/usb/line6/Makefile index fa3a78dac097..b8b3b2a543d8 100644 --- a/sound/usb/line6/Makefile +++ b/sound/usb/line6/Makefile @@ -1,5 +1,4 @@ snd-usb-line6-y := \ - audio.o \ capture.o \ driver.o \ midi.o \ diff --git a/sound/usb/line6/audio.c b/sound/usb/line6/audio.c deleted file mode 100644 index 95686e5af4bd..000000000000 --- a/sound/usb/line6/audio.c +++ /dev/null @@ -1,74 +0,0 @@ -/* - * Line6 Linux USB driver - 0.9.1beta - * - * Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at) - * - * 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, version 2. - * - */ - -#include -#include -#include - -#include "driver.h" -#include "audio.h" - -/* - Initialize the Line6 USB audio system. -*/ -int line6_init_audio(struct usb_line6 *line6) -{ - struct snd_card *card; - int err; - - err = snd_card_new(line6->ifcdev, - SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1, - THIS_MODULE, 0, &card); - if (err < 0) - return err; - - line6->card = card; - - strcpy(card->id, line6->properties->id); - strcpy(card->driver, DRIVER_NAME); - strcpy(card->shortname, line6->properties->name); - /* longname is 80 chars - see asound.h */ - sprintf(card->longname, "Line6 %s at USB %s", line6->properties->name, - dev_name(line6->ifcdev)); - return 0; -} -EXPORT_SYMBOL_GPL(line6_init_audio); - -/* - Register the Line6 USB audio system. -*/ -int line6_register_audio(struct usb_line6 *line6) -{ - int err; - - err = snd_card_register(line6->card); - if (err < 0) - return err; - - return 0; -} -EXPORT_SYMBOL_GPL(line6_register_audio); - -/* - Cleanup the Line6 USB audio system. -*/ -void line6_cleanup_audio(struct usb_line6 *line6) -{ - struct snd_card *card = line6->card; - - if (card == NULL) - return; - - snd_card_disconnect(card); - snd_card_free(card); - line6->card = NULL; -} -EXPORT_SYMBOL_GPL(line6_cleanup_audio); diff --git a/sound/usb/line6/audio.h b/sound/usb/line6/audio.h deleted file mode 100644 index 5f8a09a0fa95..000000000000 --- a/sound/usb/line6/audio.h +++ /dev/null @@ -1,21 +0,0 @@ -/* - * Line6 Linux USB driver - 0.9.1beta - * - * Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at) - * - * 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, version 2. - * - */ - -#ifndef AUDIO_H -#define AUDIO_H - -#include "driver.h" - -extern void line6_cleanup_audio(struct usb_line6 *); -extern int line6_init_audio(struct usb_line6 *); -extern int line6_register_audio(struct usb_line6 *); - -#endif diff --git a/sound/usb/line6/capture.c b/sound/usb/line6/capture.c index 727b31876d48..e8c54ede9227 100644 --- a/sound/usb/line6/capture.c +++ b/sound/usb/line6/capture.c @@ -14,7 +14,6 @@ #include #include -#include "audio.h" #include "capture.h" #include "driver.h" #include "pcm.h" diff --git a/sound/usb/line6/driver.c b/sound/usb/line6/driver.c index b8f5134dcec2..8b6a658a8a58 100644 --- a/sound/usb/line6/driver.c +++ b/sound/usb/line6/driver.c @@ -15,7 +15,9 @@ #include #include -#include "audio.h" +#include +#include + #include "capture.h" #include "driver.h" #include "midi.h" @@ -481,17 +483,16 @@ ssize_t line6_nop_read(struct device *dev, struct device_attribute *attr, EXPORT_SYMBOL_GPL(line6_nop_read); /* - Generic destructor. + Card destructor. */ -static void line6_destruct(struct usb_interface *interface) +static void line6_destruct(struct snd_card *card) { - struct usb_line6 *line6; + struct usb_line6 *line6 = card->private_data; + struct usb_device *usbdev; - if (interface == NULL) - return; - line6 = usb_get_intfdata(interface); - if (line6 == NULL) + if (!line6) return; + usbdev = line6->usbdev; /* free buffer memory first: */ kfree(line6->buffer_message); @@ -500,8 +501,11 @@ static void line6_destruct(struct usb_interface *interface) /* then free URBs: */ usb_free_urb(line6->urb_listen); - /* make sure the device isn't destructed twice: */ - usb_set_intfdata(interface, NULL); + /* free interface data: */ + kfree(line6); + + /* decrement reference counters: */ + usb_put_dev(usbdev); } /* @@ -513,6 +517,7 @@ int line6_probe(struct usb_interface *interface, int (*private_init)(struct usb_interface *, struct usb_line6 *)) { struct usb_device *usbdev; + struct snd_card *card; int interface_number; int ret; @@ -569,8 +574,26 @@ int line6_probe(struct usb_interface *interface, } } + ret = snd_card_new(line6->ifcdev, + SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1, + THIS_MODULE, 0, &card); + if (ret < 0) + goto err_put; + + line6->card = card; + strcpy(card->id, line6->properties->id); + strcpy(card->driver, DRIVER_NAME); + strcpy(card->shortname, line6->properties->name); + sprintf(card->longname, "Line6 %s at USB %s", line6->properties->name, + dev_name(line6->ifcdev)); + card->private_data = line6; + card->private_free = line6_destruct; + usb_set_intfdata(interface, line6); + /* increment reference counters: */ + usb_get_dev(usbdev); + if (properties->capabilities & LINE6_CAP_CONTROL) { /* initialize USB buffers: */ line6->buffer_listen = @@ -612,15 +635,11 @@ int line6_probe(struct usb_interface *interface, dev_info(&interface->dev, "Line6 %s now attached\n", line6->properties->name); - /* increment reference counters: */ - usb_get_intf(interface); - usb_get_dev(usbdev); - return 0; -err_destruct: - line6_destruct(interface); -err_put: + err_destruct: + snd_card_free(card); + err_put: return ret; } EXPORT_SYMBOL_GPL(line6_probe); @@ -642,29 +661,26 @@ void line6_disconnect(struct usb_interface *interface) interface_number = interface->cur_altsetting->desc.bInterfaceNumber; line6 = usb_get_intfdata(interface); + if (!line6) + return; - if (line6 != NULL) { - if (line6->urb_listen != NULL) - line6_stop_listen(line6); + if (line6->urb_listen != NULL) + line6_stop_listen(line6); - if (usbdev != line6->usbdev) - dev_err(line6->ifcdev, - "driver bug: inconsistent usb device\n"); + if (usbdev != line6->usbdev) + dev_err(line6->ifcdev, "driver bug: inconsistent usb device\n"); + snd_card_disconnect(line6->card); + if (line6->disconnect) line6->disconnect(interface); - dev_info(&interface->dev, "Line6 %s now disconnected\n", - line6->properties->name); - } - - line6_destruct(interface); + dev_info(&interface->dev, "Line6 %s now disconnected\n", + line6->properties->name); - /* free interface data: */ - kfree(line6); + /* make sure the device isn't destructed twice: */ + usb_set_intfdata(interface, NULL); - /* decrement reference counters: */ - usb_put_intf(interface); - usb_put_dev(usbdev); + snd_card_free_when_closed(line6->card); } EXPORT_SYMBOL_GPL(line6_disconnect); diff --git a/sound/usb/line6/midi.c b/sound/usb/line6/midi.c index f333cef5d2d7..68793cc5dc1e 100644 --- a/sound/usb/line6/midi.c +++ b/sound/usb/line6/midi.c @@ -15,7 +15,6 @@ #include #include -#include "audio.h" #include "driver.h" #include "midi.h" #include "usbdefs.h" diff --git a/sound/usb/line6/pcm.c b/sound/usb/line6/pcm.c index edab3cd7c048..1e77d0d9da17 100644 --- a/sound/usb/line6/pcm.c +++ b/sound/usb/line6/pcm.c @@ -16,7 +16,6 @@ #include #include -#include "audio.h" #include "capture.h" #include "driver.h" #include "playback.h" diff --git a/sound/usb/line6/playback.c b/sound/usb/line6/playback.c index 5a7fe409a3b9..ec2384c875a7 100644 --- a/sound/usb/line6/playback.c +++ b/sound/usb/line6/playback.c @@ -14,7 +14,6 @@ #include #include -#include "audio.h" #include "capture.h" #include "driver.h" #include "pcm.h" diff --git a/sound/usb/line6/pod.c b/sound/usb/line6/pod.c index d6bc5a1ab7f4..6b30deb6b157 100644 --- a/sound/usb/line6/pod.c +++ b/sound/usb/line6/pod.c @@ -18,7 +18,6 @@ #include #include -#include "audio.h" #include "capture.h" #include "driver.h" #include "playback.h" @@ -340,7 +339,7 @@ static void pod_startup4(struct work_struct *work) line6_read_serial_number(&pod->line6, &pod->serial_number); /* ALSA audio interface: */ - line6_register_audio(line6); + snd_card_register(line6->card); } /* POD special files: */ @@ -397,21 +396,6 @@ static struct snd_kcontrol_new pod_control_monitor = { .put = snd_pod_control_monitor_put }; -/* - POD destructor. -*/ -static void pod_destruct(struct usb_interface *interface) -{ - struct usb_line6_pod *pod = usb_get_intfdata(interface); - - if (pod == NULL) - return; - line6_cleanup_audio(&pod->line6); - - del_timer(&pod->startup_timer); - cancel_work_sync(&pod->startup_work); -} - /* POD device disconnected. */ @@ -424,21 +408,18 @@ static void line6_pod_disconnect(struct usb_interface *interface) pod = usb_get_intfdata(interface); if (pod != NULL) { - struct snd_line6_pcm *line6pcm = pod->line6.line6pcm; struct device *dev = &interface->dev; - if (line6pcm != NULL) - line6_pcm_disconnect(line6pcm); - if (dev != NULL) { /* remove sysfs entries: */ device_remove_file(dev, &dev_attr_device_id); device_remove_file(dev, &dev_attr_firmware_version); device_remove_file(dev, &dev_attr_serial_number); } - } - pod_destruct(interface); + del_timer_sync(&pod->startup_timer); + cancel_work_sync(&pod->startup_work); + } } /* @@ -457,8 +438,8 @@ static int pod_create_files2(struct device *dev) /* Try to init POD device. */ -static int pod_try_init(struct usb_interface *interface, - struct usb_line6 *line6) +static int pod_init(struct usb_interface *interface, + struct usb_line6 *line6) { int err; struct usb_line6_pod *pod = (struct usb_line6_pod *) line6; @@ -477,11 +458,6 @@ static int pod_try_init(struct usb_interface *interface, if (err < 0) return err; - /* initialize audio system: */ - err = line6_init_audio(line6); - if (err < 0) - return err; - /* initialize MIDI subsystem: */ err = line6_init_midi(line6); if (err < 0) @@ -514,20 +490,6 @@ static int pod_try_init(struct usb_interface *interface, return 0; } -/* - Init POD device (and clean up in case of failure). -*/ -static int pod_init(struct usb_interface *interface, - struct usb_line6 *line6) -{ - int err = pod_try_init(interface, line6); - - if (err < 0) - pod_destruct(interface); - - return err; -} - #define LINE6_DEVICE(prod) USB_DEVICE(0x0e41, prod) #define LINE6_IF_NUM(prod, n) USB_DEVICE_INTERFACE_NUMBER(0x0e41, prod, n) @@ -636,17 +598,13 @@ static int pod_probe(struct usb_interface *interface, const struct usb_device_id *id) { struct usb_line6_pod *pod; - int err; pod = kzalloc(sizeof(*pod), GFP_KERNEL); if (!pod) return -ENODEV; - err = line6_probe(interface, &pod->line6, - &pod_properties_table[id->driver_info], - pod_init); - if (err < 0) - kfree(pod); - return err; + return line6_probe(interface, &pod->line6, + &pod_properties_table[id->driver_info], + pod_init); } static struct usb_driver pod_driver = { diff --git a/sound/usb/line6/podhd.c b/sound/usb/line6/podhd.c index 8f4ca1d20b62..1d11185780e3 100644 --- a/sound/usb/line6/podhd.c +++ b/sound/usb/line6/podhd.c @@ -15,7 +15,6 @@ #include #include -#include "audio.h" #include "driver.h" #include "pcm.h" #include "usbdefs.h" @@ -85,58 +84,18 @@ static struct line6_pcm_properties podhd_pcm_properties = { .bytes_per_frame = PODHD_BYTES_PER_FRAME }; -/* - POD HD destructor. -*/ -static void podhd_destruct(struct usb_interface *interface) -{ - struct usb_line6_podhd *podhd = usb_get_intfdata(interface); - - if (podhd == NULL) - return; - line6_cleanup_audio(&podhd->line6); -} - -/* - POD HD device disconnected. -*/ -static void line6_podhd_disconnect(struct usb_interface *interface) -{ - struct usb_line6_podhd *podhd; - - if (interface == NULL) - return; - podhd = usb_get_intfdata(interface); - - if (podhd != NULL) { - struct snd_line6_pcm *line6pcm = podhd->line6.line6pcm; - - if (line6pcm != NULL) - line6_pcm_disconnect(line6pcm); - } - - podhd_destruct(interface); -} - /* Try to init POD HD device. */ -static int podhd_try_init(struct usb_interface *interface, - struct usb_line6_podhd *podhd) +static int podhd_init(struct usb_interface *interface, + struct usb_line6 *line6) { + struct usb_line6_podhd *podhd = (struct usb_line6_podhd *) line6; int err; - struct usb_line6 *line6 = &podhd->line6; if ((interface == NULL) || (podhd == NULL)) return -ENODEV; - line6->disconnect = line6_podhd_disconnect; - - /* initialize audio system: */ - err = line6_init_audio(line6); - if (err < 0) - return err; - /* initialize MIDI subsystem: */ err = line6_init_midi(line6); if (err < 0) @@ -148,8 +107,7 @@ static int podhd_try_init(struct usb_interface *interface, return err; /* register USB audio system: */ - err = line6_register_audio(line6); - return err; + return snd_card_register(line6->card); } #define LINE6_DEVICE(prod) USB_DEVICE(0x0e41, prod) @@ -217,21 +175,6 @@ static const struct line6_properties podhd_properties_table[] = { }, }; -/* - Init POD HD device (and clean up in case of failure). -*/ -static int podhd_init(struct usb_interface *interface, - struct usb_line6 *line6) -{ - struct usb_line6_podhd *podhd = (struct usb_line6_podhd *) line6; - int err = podhd_try_init(interface, podhd); - - if (err < 0) - podhd_destruct(interface); - - return err; -} - /* Probe USB device. */ @@ -239,17 +182,13 @@ static int podhd_probe(struct usb_interface *interface, const struct usb_device_id *id) { struct usb_line6_podhd *podhd; - int err; podhd = kzalloc(sizeof(*podhd), GFP_KERNEL); if (!podhd) return -ENODEV; - err = line6_probe(interface, &podhd->line6, - &podhd_properties_table[id->driver_info], - podhd_init); - if (err < 0) - kfree(podhd); - return err; + return line6_probe(interface, &podhd->line6, + &podhd_properties_table[id->driver_info], + podhd_init); } static struct usb_driver podhd_driver = { diff --git a/sound/usb/line6/toneport.c b/sound/usb/line6/toneport.c index 6ec3268a6153..3097a75a9bec 100644 --- a/sound/usb/line6/toneport.c +++ b/sound/usb/line6/toneport.c @@ -17,7 +17,6 @@ #include #include -#include "audio.h" #include "capture.h" #include "driver.h" #include "playback.h" @@ -330,18 +329,6 @@ static struct snd_kcontrol_new toneport_control_source = { .put = snd_toneport_source_put }; -/* - Toneport destructor. -*/ -static void toneport_destruct(struct usb_interface *interface) -{ - struct usb_line6_toneport *toneport = usb_get_intfdata(interface); - - if (toneport == NULL) - return; - line6_cleanup_audio(&toneport->line6); -} - /* Setup Toneport device. */ @@ -394,25 +381,14 @@ static void line6_toneport_disconnect(struct usb_interface *interface) device_remove_file(&interface->dev, &dev_attr_led_red); device_remove_file(&interface->dev, &dev_attr_led_green); } - - if (toneport != NULL) { - struct snd_line6_pcm *line6pcm = toneport->line6.line6pcm; - - if (line6pcm != NULL) { - line6_pcm_release(line6pcm, LINE6_BITS_PCM_MONITOR); - line6_pcm_disconnect(line6pcm); - } - } - - toneport_destruct(interface); } /* Try to init Toneport device. */ -static int toneport_try_init(struct usb_interface *interface, - struct usb_line6 *line6) +static int toneport_init(struct usb_interface *interface, + struct usb_line6 *line6) { int err; struct usb_line6_toneport *toneport = (struct usb_line6_toneport *) line6; @@ -422,11 +398,6 @@ static int toneport_try_init(struct usb_interface *interface, line6->disconnect = line6_toneport_disconnect; - /* initialize audio system: */ - err = line6_init_audio(line6); - if (err < 0) - return err; - /* initialize PCM subsystem: */ err = line6_init_pcm(line6, &toneport_pcm_properties); if (err < 0) @@ -456,11 +427,6 @@ static int toneport_try_init(struct usb_interface *interface, break; } - /* register audio system: */ - err = line6_register_audio(line6); - if (err < 0) - return err; - line6_read_serial_number(line6, &toneport->serial_number); line6_read_data(line6, 0x80c2, &toneport->firmware_version, 1); @@ -477,21 +443,8 @@ static int toneport_try_init(struct usb_interface *interface, (unsigned long)toneport); mod_timer(&toneport->timer, jiffies + TONEPORT_PCM_DELAY * HZ); - return 0; -} - -/* - Init Toneport device (and clean up in case of failure). -*/ -static int toneport_init(struct usb_interface *interface, - struct usb_line6 *line6) -{ - int err = toneport_try_init(interface, line6); - - if (err < 0) - toneport_destruct(interface); - - return err; + /* register audio system: */ + return snd_card_register(line6->card); } #ifdef CONFIG_PM @@ -595,18 +548,14 @@ static int toneport_probe(struct usb_interface *interface, const struct usb_device_id *id) { struct usb_line6_toneport *toneport; - int err; toneport = kzalloc(sizeof(*toneport), GFP_KERNEL); if (!toneport) return -ENODEV; toneport->type = id->driver_info; - err = line6_probe(interface, &toneport->line6, - &toneport_properties_table[id->driver_info], - toneport_init); - if (err < 0) - kfree(toneport); - return err; + return line6_probe(interface, &toneport->line6, + &toneport_properties_table[id->driver_info], + toneport_init); } static struct usb_driver toneport_driver = { diff --git a/sound/usb/line6/variax.c b/sound/usb/line6/variax.c index 9a9c7e48e24f..a591c2c5794f 100644 --- a/sound/usb/line6/variax.c +++ b/sound/usb/line6/variax.c @@ -16,7 +16,6 @@ #include #include -#include "audio.h" #include "driver.h" #include "usbdefs.h" @@ -179,7 +178,7 @@ static void variax_startup6(struct work_struct *work) CHECK_STARTUP_PROGRESS(variax->startup_progress, VARIAX_STARTUP_SETUP); /* ALSA audio interface: */ - line6_register_audio(&variax->line6); + snd_card_register(variax->line6.card); } /* @@ -211,13 +210,16 @@ static void line6_variax_process_message(struct usb_line6 *line6) /* Variax destructor. */ -static void variax_destruct(struct usb_interface *interface) +static void line6_variax_disconnect(struct usb_interface *interface) { - struct usb_line6_variax *variax = usb_get_intfdata(interface); + struct usb_line6_variax *variax; + + if (!interface) + return; - if (variax == NULL) + variax = usb_get_intfdata(interface); + if (!variax) return; - line6_cleanup_audio(&variax->line6); del_timer(&variax->startup_timer1); del_timer(&variax->startup_timer2); @@ -226,22 +228,11 @@ static void variax_destruct(struct usb_interface *interface) kfree(variax->buffer_activate); } -/* - Workbench device disconnected. -*/ -static void line6_variax_disconnect(struct usb_interface *interface) -{ - if (interface == NULL) - return; - - variax_destruct(interface); -} - /* Try to init workbench device. */ -static int variax_try_init(struct usb_interface *interface, - struct usb_line6 *line6) +static int variax_init(struct usb_interface *interface, + struct usb_line6 *line6) { struct usb_line6_variax *variax = (struct usb_line6_variax *) line6; int err; @@ -263,11 +254,6 @@ static int variax_try_init(struct usb_interface *interface, if (variax->buffer_activate == NULL) return -ENOMEM; - /* initialize audio system: */ - err = line6_init_audio(&variax->line6); - if (err < 0) - return err; - /* initialize MIDI subsystem: */ err = line6_init_midi(&variax->line6); if (err < 0) @@ -278,20 +264,6 @@ static int variax_try_init(struct usb_interface *interface, return 0; } -/* - Init workbench device (and clean up in case of failure). -*/ -static int variax_init(struct usb_interface *interface, - struct usb_line6 *line6) -{ - int err = variax_try_init(interface, line6); - - if (err < 0) - variax_destruct(interface); - - return err; -} - #define LINE6_DEVICE(prod) USB_DEVICE(0x0e41, prod) #define LINE6_IF_NUM(prod, n) USB_DEVICE_INTERFACE_NUMBER(0x0e41, prod, n) @@ -335,17 +307,13 @@ static int variax_probe(struct usb_interface *interface, const struct usb_device_id *id) { struct usb_line6_variax *variax; - int err; variax = kzalloc(sizeof(*variax), GFP_KERNEL); if (!variax) return -ENODEV; - err = line6_probe(interface, &variax->line6, - &variax_properties_table[id->driver_info], - variax_init); - if (err < 0) - kfree(variax); - return err; + return line6_probe(interface, &variax->line6, + &variax_properties_table[id->driver_info], + variax_init); } static struct usb_driver variax_driver = {