[v2,2/6] ASoC: Intel: Create a helper to search for matching machine

Commit Message

Naveen M May 11, 2017, 12:32 p.m. UTC

Create a helper function to search for a matching machine
based on HID. No functional change

Signed-off-by: Naveen M <[e-mail]>
Signed-off-by: Harsha Priya <[e-mail]>
---
 sound/soc/intel/common/sst-acpi.h       |  3 +++
 sound/soc/intel/common/sst-match-acpi.c | 19 +++++++++++++++----
 2 files changed, 18 insertions(+), 4 deletions(-)

Patch

diff --git a/sound/soc/intel/common/sst-acpi.h b/sound/soc/intel/common/sst-acpi.h
index 214e000..3649d3b 100644
--- a/sound/soc/intel/common/sst-acpi.h
+++ b/sound/soc/intel/common/sst-acpi.h
@@ -43,6 +43,9 @@  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 1070f3a..f4af3d1 100644
--- a/sound/soc/intel/common/sst-match-acpi.c
+++ b/sound/soc/intel/common/sst-match-acpi.c
@@ -63,15 +63,26 @@  static acpi_status sst_acpi_mach_match(acpi_handle handle, u32 level,
 	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;
-	bool found = false;
 
 	for (mach = machines; mach->id[0]; mach++)
-		if (ACPI_SUCCESS(acpi_get_devices(mach->id,
-						  sst_acpi_mach_match,
-						  &found, NULL)) && found)
+		if (sst_acpi_check_hid(mach->id) == true)
 			return mach;
 	return NULL;
 }