[PATCH 6.9 218/374] ALSA: hda: cs35l56: Fix lifetime of cs_dsp instance

Greg Kroah-Hartman
2024-06-06T14:10:09Z

From: Richard Fitzgerald <rf@opensource.cirrus.com>

[ Upstream commit d344873c4cbde249b7152d36a273bcc45864001e ]

The cs_dsp instance is initialized in the driver probe() so it
should be freed in the driver remove(). Also fix a missing call
to cs_dsp_remove() in the error path of cs35l56_hda_common_probe().

The call to cs_dsp_remove() was being done in the component unbind
callback cs35l56_hda_unbind(). This meant that if the driver was
unbound and then re-bound it would be using an uninitialized cs_dsp
instance.

It is best to initialize the cs_dsp instance in probe() so that it
can return an error if it fails. The component binding API doesn't
have any error handling so there's no way to handle a failure if
cs_dsp was initialized in the bind.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Fixes: 73cfbfa9caea ("ALSA: hda/cs35l56: Add driver for Cirrus Logic CS35L56 amplifier")
Link: https://lore.kernel.org/r/20240508100811.49514-1-rf@opensource.cirrus.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
sound/pci/hda/cs35l56_hda.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/sound/pci/hda/cs35l56_hda.c b/sound/pci/hda/cs35l56_hda.c
index 558c1f38fe971..11b0570ff56d4 100644
--- a/sound/pci/hda/cs35l56_hda.c
+++ b/sound/pci/hda/cs35l56_hda.c
@@ -732,8 +732,6 @@ static void cs35l56_hda_unbind(struct device *dev, struct device *master, void *
if (cs35l56->base.fw_patched)
cs_dsp_power_down(&cs35l56->cs_dsp);

- cs_dsp_remove(&cs35l56->cs_dsp);
-
if (comps[cs35l56->index].dev == dev)
memset(&comps[cs35l56->index], 0, sizeof(*comps));

@@ -1035,7 +1033,7 @@ int cs35l56_hda_common_probe(struct cs35l56_hda *cs35l56, int hid, int id)
ARRAY_SIZE(cs35l56_hda_dai_config));
ret = cs35l56_force_sync_asp1_registers_from_cache(&cs35l56->base);
if (ret)
- goto err;
+ goto dsp_err;

/*
* By default only enable one ASP1TXn, where n=amplifier index,
@@ -1061,6 +1059,8 @@ int cs35l56_hda_common_probe(struct cs35l56_hda *cs35l56, int hid, int id)

pm_err:
pm_runtime_disable(cs35l56->base.dev);
+dsp_err:
+ cs_dsp_remove(&cs35l56->cs_dsp);
err:
gpiod_set_value_cansleep(cs35l56->base.reset_gpio, 0);

@@ -1078,6 +1078,8 @@ void cs35l56_hda_remove(struct device *dev)

component_del(cs35l56->base.dev, &cs35l56_hda_comp_ops);

+ cs_dsp_remove(&cs35l56->cs_dsp);
+
kfree(cs35l56->system_name);
pm_runtime_put_noidle(cs35l56->base.dev);

--
2.43.0