linux-kernel - [PATCH v2 2/2] ALSA: hda - identify when audio is provided by a video driver

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Message-Id: <f93d5d8c490a013cbf7d3018655ac6d73dcab4e2.1651314499.git.mchehab@kernel.org>
Date:   Sat, 30 Apr 2022 11:30:59 +0100
From:   Mauro Carvalho Chehab <mchehab@...nel.org>
To:     Luis Chamberlain <mcgrof@...nel.org>
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        "Daniel Vetter" <daniel@...ll.ch>,
        "David Airlie" <airlied@...ux.ie>,
        "Greg KH" <gregkh@...uxfoundation.org>,
        "Jaroslav Kysela" <perex@...ex.cz>,
        "Kai Vehmanen" <kai.vehmanen@...el.com>,
        "Lucas De Marchi" <lucas.demarchi@...el.com>,
        "Pierre-Louis Bossart" <pierre-louis.bossart@...el.com>,
        "Takashi Iwai" <tiwai@...e.com>, alsa-devel@...a-project.org,
        dri-devel@...ts.freedesktop.org, intel-gfx@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, linux-modules@...r.kernel.org,
        mauro.chehab@...ux.intel.com
Subject: [PATCH v2 2/2] ALSA: hda - identify when audio is provided by a video driver

On some devices, the hda driver needs to hook into a video driver,
in order to be able to properly access the audio hardware and/or
the power management function.

That's the case of several snd_hda_intel devices that depends on
i915 driver.

Ensure that a proper reference between the snd-hda driver needing
such binding is shown at /proc/modules, in order to allow userspace
to know about such binding.

Signed-off-by: Mauro Carvalho Chehab <mchehab@...nel.org>
---

See [PATCH v2 0/2] at: https://lore.kernel.org/all/cover.1651314499.git.mchehab@kernel.org/

 sound/hda/hdac_component.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/hda/hdac_component.c b/sound/hda/hdac_component.c
index bb37e7e0bd79..30e130457272 100644
--- a/sound/hda/hdac_component.c
+++ b/sound/hda/hdac_component.c
@@ -199,7 +199,7 @@ static int hdac_component_master_bind(struct device *dev)
 	}
 
 	/* pin the module to avoid dynamic unbinding, but only if given */
-	if (!try_module_get(acomp->ops->owner)) {
+	if (!__try_module_get(acomp->ops->owner, dev->driver->owner)) {
 		ret = -ENODEV;
 		goto out_unbind;
 	}
-- 
2.35.1