diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index e3cd0b16031ad32c70ee1b47516c23b02856cbcb..8653dac01a76127b8485d5a07836a124c3d0d759 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -836,7 +836,7 @@ acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout)
 			static const int quantum_ms = 1000 / HZ;
 
 			ret = down_trylock(sem);
-			for (i = timeout; (i > 0 && ret < 0); i -= quantum_ms) {
+			for (i = timeout; (i > 0 && ret != 0); i -= quantum_ms) {
 				schedule_timeout_interruptible(1);
 				ret = down_trylock(sem);
 			}