From e4493974dbce6fdf634fed542bb8cc7edb3d1419 Mon Sep 17 00:00:00 2001 From: Kai-Heng Feng Date: Thu, 4 Mar 2021 12:34:16 +0800 Subject: [PATCH] ALSA: usb-audio: Disable USB autosuspend properly in setup_disable_autosuspend() commit 9799110825dba087c2bdce886977cf84dada2005 upstream. Rear audio on Lenovo ThinkStation P620 stops working after commit 1965c4364bdd ("ALSA: usb-audio: Disable autosuspend for Lenovo ThinkStation P620"): [ 6.013526] usbcore: registered new interface driver snd-usb-audio [ 6.023064] usb 3-6: cannot get ctl value: req = 0x81, wValue = 0x100, wIndex = 0x0, type = 1 [ 6.023083] usb 3-6: cannot get ctl value: req = 0x81, wValue = 0x202, wIndex = 0x0, type = 4 [ 6.023090] usb 3-6: cannot get ctl value: req = 0x81, wValue = 0x100, wIndex = 0x0, type = 1 [ 6.023098] usb 3-6: cannot get ctl value: req = 0x81, wValue = 0x202, wIndex = 0x0, type = 4 [ 6.023103] usb 3-6: cannot get ctl value: req = 0x81, wValue = 0x100, wIndex = 0x0, type = 1 [ 6.023110] usb 3-6: cannot get ctl value: req = 0x81, wValue = 0x202, wIndex = 0x0, type = 4 [ 6.045846] usb 3-6: cannot get ctl value: req = 0x81, wValue = 0x100, wIndex = 0x0, type = 1 [ 6.045866] usb 3-6: cannot get ctl value: req = 0x81, wValue = 0x202, wIndex = 0x0, type = 4 [ 6.045877] usb 3-6: cannot get ctl value: req = 0x81, wValue = 0x100, wIndex = 0x0, type = 1 [ 6.045886] usb 3-6: cannot get ctl value: req = 0x81, wValue = 0x202, wIndex = 0x0, type = 4 [ 6.045894] usb 3-6: cannot get ctl value: req = 0x81, wValue = 0x100, wIndex = 0x0, type = 1 [ 6.045908] usb 3-6: cannot get ctl value: req = 0x81, wValue = 0x202, wIndex = 0x0, type = 4 I overlooked the issue because when I was working on the said commit, only the front audio is tested. Apology for that. Changing supports_autosuspend in driver is too late for disabling autosuspend, because it was already used by USB probe routine, so it can break the balance on the following code that depends on supports_autosuspend. Fix it by using usb_disable_autosuspend() helper, and balance the suspend count in disconnect callback. Fixes: 1965c4364bdd ("ALSA: usb-audio: Disable autosuspend for Lenovo ThinkStation P620") Signed-off-by: Kai-Heng Feng Cc: Link: https://lore.kernel.org/r/20210304043419.287191-1-kai.heng.feng@canonical.com Signed-off-by: Takashi Iwai Signed-off-by: Greg Kroah-Hartman --- sound/usb/card.c | 5 +++++ sound/usb/quirks.c | 2 +- sound/usb/usbaudio.h | 1 + 3 files changed, 7 insertions(+), 1 deletion(-) diff --git a/sound/usb/card.c b/sound/usb/card.c index 57d6d4f..398ce86 100644 --- a/sound/usb/card.c +++ b/sound/usb/card.c @@ -830,6 +830,8 @@ static int usb_audio_probe(struct usb_interface *intf, snd_media_device_create(chip, intf); } + chip->quirk_type = quirk->type; + usb_chip[chip->index] = chip; chip->intf[chip->num_interfaces] = intf; chip->num_interfaces++; @@ -912,6 +914,9 @@ static void usb_audio_disconnect(struct usb_interface *intf) } else { mutex_unlock(®ister_mutex); } + + if (chip->quirk_type & QUIRK_SETUP_DISABLE_AUTOSUSPEND) + usb_enable_autosuspend(interface_to_usbdev(intf)); } /* lock the shutdown (disconnect) task and autoresume */ diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c index a995bf5..10b3a80 100644 --- a/sound/usb/quirks.c +++ b/sound/usb/quirks.c @@ -523,7 +523,7 @@ static int setup_disable_autosuspend(struct snd_usb_audio *chip, struct usb_driver *driver, const struct snd_usb_audio_quirk *quirk) { - driver->supports_autosuspend = 0; + usb_disable_autosuspend(interface_to_usbdev(iface)); return 1; /* Continue with creating streams and mixer */ } diff --git a/sound/usb/usbaudio.h b/sound/usb/usbaudio.h index 0805b7f..9667060 100644 --- a/sound/usb/usbaudio.h +++ b/sound/usb/usbaudio.h @@ -27,6 +27,7 @@ struct snd_usb_audio { struct snd_card *card; struct usb_interface *intf[MAX_CARD_INTERFACES]; u32 usb_id; + uint16_t quirk_type; struct mutex mutex; unsigned int system_suspend; atomic_t active; -- 2.7.4