linux-kernel - [PATCH] ASoC: Intel: common: Replace sst_acpi_check_hid with acpi_dev

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Date:   Thu, 9 Nov 2017 21:07:41 +0000
From:   Jeremy Cline <jeremy@...ine.org>
To:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>
Cc:     Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>,
        Hans de Goede <hdegoede@...hat.com>,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
        Jeremy Cline <jeremy@...ine.org>
Subject: [PATCH] ASoC: Intel: common: Replace sst_acpi_check_hid with acpi_dev_present

Replace the sst_acpi_check_hid helper function added in
commit 915ae2b9f0fe ("ASoC: Intel: Create a helper to search for
matching machine") with the generic acpi_dev_present helper function
and remove the now unused sst_acpi_check_hid function. This should have
no functional change.

Signed-off-by: Jeremy Cline <jeremy@...ine.org>
---
 sound/soc/intel/common/sst-acpi.h       |  3 ---
 sound/soc/intel/common/sst-match-acpi.c | 32 ++------------------------------
 2 files changed, 2 insertions(+), 33 deletions(-)

diff --git a/sound/soc/intel/common/sst-acpi.h b/sound/soc/intel/common/sst-acpi.h
index afe9b87b8bd5..d7facac83b7e 100644
--- a/sound/soc/intel/common/sst-acpi.h
+++ b/sound/soc/intel/common/sst-acpi.h
@@ -43,9 +43,6 @@ static inline bool sst_acpi_find_package_from_hid(const u8 hid[ACPI_ID_LEN],
 /* acpi match */
 struct sst_acpi_mach *sst_acpi_find_machine(struct sst_acpi_mach *machines);
 
-/* acpi check hid */
-bool sst_acpi_check_hid(const u8 hid[ACPI_ID_LEN]);
-
 /* Descriptor for SST ASoC machine driver */
 struct sst_acpi_mach {
 	/* ACPI ID for the matching machine driver. Audio codec for instance */
diff --git a/sound/soc/intel/common/sst-match-acpi.c b/sound/soc/intel/common/sst-match-acpi.c
index 56d26f36a3cb..f8e1b92de79a 100644
--- a/sound/soc/intel/common/sst-match-acpi.c
+++ b/sound/soc/intel/common/sst-match-acpi.c
@@ -49,40 +49,12 @@ const char *sst_acpi_find_name_from_hid(const u8 hid[ACPI_ID_LEN])
 }
 EXPORT_SYMBOL_GPL(sst_acpi_find_name_from_hid);
 
-static acpi_status sst_acpi_mach_match(acpi_handle handle, u32 level,
-				       void *context, void **ret)
-{
-	unsigned long long sta;
-	acpi_status status;
-
-	*(bool *)context = true;
-	status = acpi_evaluate_integer(handle, "_STA", NULL, &sta);
-	if (ACPI_FAILURE(status) || !(sta & ACPI_STA_DEVICE_PRESENT))
-		*(bool *)context = false;
-
-	return AE_OK;
-}
-
-bool sst_acpi_check_hid(const u8 hid[ACPI_ID_LEN])
-{
-	acpi_status status;
-	bool found = false;
-
-	status = acpi_get_devices(hid, sst_acpi_mach_match, &found, NULL);
-
-	if (ACPI_FAILURE(status))
-		return false;
-
-	return found;
-}
-EXPORT_SYMBOL_GPL(sst_acpi_check_hid);
-
 struct sst_acpi_mach *sst_acpi_find_machine(struct sst_acpi_mach *machines)
 {
 	struct sst_acpi_mach *mach;
 
 	for (mach = machines; mach->id[0]; mach++) {
-		if (sst_acpi_check_hid(mach->id) == true) {
+		if (acpi_dev_present(mach->id, NULL, -1) == true) {
 			if (mach->machine_quirk == NULL)
 				return mach;
 
@@ -161,7 +133,7 @@ struct sst_acpi_mach *sst_acpi_codec_list(void *arg)
 		return mach;
 
 	for (i = 0; i < codec_list->num_codecs; i++) {
-		if (sst_acpi_check_hid(codec_list->codecs[i]) != true)
+		if (acpi_dev_present(codec_list->codecs[i], NULL, -1) != true)
 			return NULL;
 	}
 
-- 
2.14.3