This isn't functionally identical. In some cases a hint to disable

unit 0 would in fact disable all units.

This reverts r241856

Approved by: cperciva (implicit)

3 files changed, 10 insertions, 0 deletions

diff --git a/sys/dev/acpica/acpi.c b/sys/dev/acpica/acpi.c
index 5e0466d0..cfe08ed 100644
--- a/sys/dev/acpica/acpi.c
+++ b/sys/dev/acpica/acpi.c
@@ -377,6 +377,10 @@ acpi_identify(void)
     if (!cold)
 	return (ENXIO);
 
+    /* Check that we haven't been disabled with a hint. */
+    if (resource_disabled("acpi", 0))
+	return (ENXIO);
+
     /* Check for other PM systems. */
     if (power_pm_get_type() != POWER_PM_TYPE_NONE &&
 	power_pm_get_type() != POWER_PM_TYPE_ACPI) {
diff --git a/sys/dev/acpica/acpi_perf.c b/sys/dev/acpica/acpi_perf.c
index e7d697c..3f047cc 100644
--- a/sys/dev/acpica/acpi_perf.c
+++ b/sys/dev/acpica/acpi_perf.c
@@ -175,6 +175,9 @@ acpi_perf_probe(device_t dev)
 	ACPI_BUFFER buf;
 	int error, rid, type;
 
+	if (resource_disabled("acpi_perf", 0))
+		return (ENXIO);
+
 	/*
 	 * Check the performance state registers.  If they are of type
 	 * "functional fixed hardware", we attach quietly since we will
diff --git a/sys/dev/acpica/acpi_throttle.c b/sys/dev/acpica/acpi_throttle.c
index 4ac5222..40476e0 100644
--- a/sys/dev/acpica/acpi_throttle.c
+++ b/sys/dev/acpica/acpi_throttle.c
@@ -167,6 +167,9 @@ static int
 acpi_throttle_probe(device_t dev)
 {
 
+	if (resource_disabled("acpi_throttle", 0))
+		return (ENXIO);
+
 	/*
 	 * On i386 platforms at least, ACPI throttling is accomplished by
 	 * the chipset modulating the STPCLK# pin based on the duty cycle.