From 00c9dd58797ef2bdc3c86e6d809ad4811d878d7b Mon Sep 17 00:00:00 2001
From: Ziye Yang <ziye.yang@intel.com>
Date: Tue, 11 May 2021 21:14:33 +0800
Subject: [PATCH] accel_engine/ioat: If no ioat devices found, we should
 return.

If no ioat devices are registered, we should return.

Change-Id: I03435946716ef653b230515da32e8ccbdf5a188a
Signed-off-by: Ziye Yang <ziye.yang@intel.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/7834
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
---
 module/accel/ioat/accel_engine_ioat.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/module/accel/ioat/accel_engine_ioat.c b/module/accel/ioat/accel_engine_ioat.c
index 8d46dde27c..2e50159c0b 100644
--- a/module/accel/ioat/accel_engine_ioat.c
+++ b/module/accel/ioat/accel_engine_ioat.c
@@ -280,6 +280,11 @@ accel_engine_ioat_init(void)
 		return -1;
 	}
 
+	if (TAILQ_EMPTY(&g_devices)) {
+		SPDK_NOTICELOG("No available ioat devices\n");
+		return -1;
+	}
+
 	g_ioat_initialized = true;
 	SPDK_NOTICELOG("Accel engine updated to use IOAT engine.\n");
 	spdk_accel_hw_engine_register(&ioat_accel_engine);