[PATCH i-g-t] lib/aux: Ensure swap space prior to suspend to disk

[don.hiatt at intel.com]

From: Don Hiatt <don.hiatt at intel.com>

Suspending to disk requires swap space, let the user know.

Signed-off-by: Don Hiatt <don.hiatt at intel.com>
---
 lib/igt_aux.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/igt_aux.c b/lib/igt_aux.c
index 578f857933f0..61683a63310c 100644
--- a/lib/igt_aux.c
+++ b/lib/igt_aux.c
@@ -864,6 +864,9 @@ void igt_system_suspend_autoresume(enum igt_suspend_state state,
 	igt_require(test == SUSPEND_TEST_NONE ||
 		    faccessat(power_dir, "pm_test", R_OK | W_OK, 0) == 0);
 
+	igt_require_f((state == SUSPEND_STATE_DISK && !intel_get_total_swap_mb()),
+			"Suspend to disk requires swap space.\n");
+
 	orig_test = get_suspend_test(power_dir);
 	set_suspend_test(power_dir, test);
 
-- 
2.17.1