linux-kernel - [PATCH v2] ASoC: tas2781: remove unused acpi_subysystem

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <631722b9ec0a4a2667d68f4747f01f3f7eb8ceb8.1707255177.git.soyer@irl.hu>
Date: Tue,  6 Feb 2024 22:34:15 +0100
From: Gergo Koteles <soyer@....hu>
To: Shenghao Ding <shenghao-ding@...com>, Kevin Lu <kevin-lu@...com>,
  Baojun Xu <baojun.xu@...com>, Jaroslav Kysela <perex@...ex.cz>,
  Takashi Iwai <tiwai@...e.com>, Liam Girdwood <lgirdwood@...il.com>,
  Mark Brown <broonie@...nel.org>
Cc: linux-sound@...r.kernel.org, linux-kernel@...r.kernel.org,
  alsa-devel@...a-project.org, Gergo Koteles <soyer@....hu>,
  stable@...r.kernel.org
Subject: [PATCH v2] ASoC: tas2781: remove unused acpi_subysystem_id

The acpi_subysystem_id is only written and freed, not read, so
unnecessary.

Fixes: ef3bcde75d06 ("ASoC: tas2781: Add tas2781 driver")
CC: stable@...r.kernel.org
Signed-off-by: Gergo Koteles <soyer@....hu>
---
 include/sound/tas2781.h           |  1 -
 sound/pci/hda/tas2781_hda_i2c.c   | 11 -----------
 sound/soc/codecs/tas2781-comlib.c |  1 -
 3 files changed, 13 deletions(-)

diff --git a/include/sound/tas2781.h b/include/sound/tas2781.h
index 9aff384941de..99ca3e401fd1 100644
--- a/include/sound/tas2781.h
+++ b/include/sound/tas2781.h
@@ -103,7 +103,6 @@ struct tasdevice_priv {
 	struct tm tm;
 
 	enum device_catlog_id catlog_id;
-	const char *acpi_subsystem_id;
 	unsigned char cal_binaryname[TASDEVICE_MAX_CHANNELS][64];
 	unsigned char crc8_lkp_tbl[CRC8_TABLE_SIZE];
 	unsigned char coef_binaryname[64];
diff --git a/sound/pci/hda/tas2781_hda_i2c.c b/sound/pci/hda/tas2781_hda_i2c.c
index 1bfb00102a77..2fd391bc693a 100644
--- a/sound/pci/hda/tas2781_hda_i2c.c
+++ b/sound/pci/hda/tas2781_hda_i2c.c
@@ -111,7 +111,6 @@ static int tas2781_get_i2c_res(struct acpi_resource *ares, void *data)
 static int tas2781_read_acpi(struct tasdevice_priv *p, const char *hid)
 {
 	struct acpi_device *adev;
-	struct device *physdev;
 	LIST_HEAD(resources);
 	const char *sub;
 	int ret;
@@ -129,18 +128,8 @@ static int tas2781_read_acpi(struct tasdevice_priv *p, const char *hid)
 
 	acpi_dev_free_resource_list(&resources);
 	strscpy(p->dev_name, hid, sizeof(p->dev_name));
-	physdev = get_device(acpi_get_first_physical_node(adev));
 	acpi_dev_put(adev);
 
-	/* No side-effect to the playback even if subsystem_id is NULL*/
-	sub = acpi_get_subsystem_id(ACPI_HANDLE(physdev));
-	if (IS_ERR(sub))
-		sub = NULL;
-
-	p->acpi_subsystem_id = sub;
-
-	put_device(physdev);
-
 	return 0;
 
 err:
diff --git a/sound/soc/codecs/tas2781-comlib.c b/sound/soc/codecs/tas2781-comlib.c
index 5d0e5348b361..3aa81514dad7 100644
--- a/sound/soc/codecs/tas2781-comlib.c
+++ b/sound/soc/codecs/tas2781-comlib.c
@@ -408,7 +408,6 @@ void tasdevice_remove(struct tasdevice_priv *tas_priv)
 {
 	if (gpio_is_valid(tas_priv->irq_info.irq_gpio))
 		gpio_free(tas_priv->irq_info.irq_gpio);
-	kfree(tas_priv->acpi_subsystem_id);
 	mutex_destroy(&tas_priv->codec_lock);
 }
 EXPORT_SYMBOL_GPL(tasdevice_remove);

base-commit: 610010737f74482a61896596a0116876ecf9e65c
-- 
2.43.0