ASoC: Intel: Create a helper to search for matching machine

[sfrench/cifs-2.6.git] / sound / soc / intel / common / sst-match-acpi.c

diff --git a/sound/soc/intel/common/sst-match-acpi.c b/sound/soc/intel/common/sst-match-acpi.c
index 1070f3ad23e50e1e495824ca13f8d7176ca0b05e..f4af3d144b822c7a3810dfdaaa03245b4b0f0a5f 100644 (file)
--- 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;
 }