Don't free the _PSS buffer until after we check to see if we have no valid

states as otherwise we will try to free the buffer twice.

1 files changed, 2 insertions, 2 deletions

diff --git a/sys/dev/acpica/acpi_perf.c b/sys/dev/acpica/acpi_perf.c
index c5018f8..38b1a27 100644
--- a/sys/dev/acpica/acpi_perf.c
+++ b/sys/dev/acpica/acpi_perf.c
@@ -298,12 +298,12 @@ acpi_perf_evaluate(device_t dev)
 
 		count++;
 	}
-	AcpiOsFree(buf.Pointer);
-	sc->px_count = count;
 
 	/* No valid Px state found. */
 	if (count == 0)
 		goto out;
+	AcpiOsFree(buf.Pointer);
+	sc->px_count = count;
 
 	/* Get the control and status registers (one of each). */
 	buf.Pointer = NULL;