This is a note to let you know that I've just added the patch titled ALSA: hda: call runtime_allow() for all hda controllers to the 5.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: alsa-hda-call-runtime_allow-for-all-hda-controllers.patch and it can be found in the queue-5.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit ec10fa556fb8f52f584f2bcce0d0a9e2d9ca20cb Author: Hui Wang <hui.wang@xxxxxxxxxxxxx> Date: Tue Apr 14 22:27:25 2020 +0800 ALSA: hda: call runtime_allow() for all hda controllers [ Upstream commit 9a6418487b566503c772cb6e7d3d44e652b019b0 ] Before the pci_driver->probe() is called, the pci subsystem calls runtime_forbid() and runtime_get_sync() on this pci dev, so only call runtime_put_autosuspend() is not enough to enable the runtime_pm on this device. For controllers with vgaswitcheroo feature, the pci/quirks.c will call runtime_allow() for this dev, then the controllers could enter rt_idle/suspend/resume, but for non-vgaswitcheroo controllers like Intel hda controllers, the runtime_pm is not enabled because the runtime_allow() is not called. Since it is no harm calling runtime_allow() twice, here let hda driver call runtime_allow() for all controllers. Then the runtime_pm is enabled on all controllers after the put_autosuspend() is called. Signed-off-by: Hui Wang <hui.wang@xxxxxxxxxxxxx> Link: https://lore.kernel.org/r/20200414142725.6020-1-hui.wang@xxxxxxxxxxxxx Signed-off-by: Takashi Iwai <tiwai@xxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c index a85b0cf7371a3..1673479b4eef3 100644 --- a/sound/pci/hda/hda_intel.c +++ b/sound/pci/hda/hda_intel.c @@ -2305,6 +2305,7 @@ static int azx_probe_continue(struct azx *chip) if (azx_has_pm_runtime(chip)) { pm_runtime_use_autosuspend(&pci->dev); + pm_runtime_allow(&pci->dev); pm_runtime_put_autosuspend(&pci->dev); }