[PATCH v2 04/10] nvme/core: add NVME_CTRL_SUSPENDED controller state

[Maxim Levitsky]

This state will be used by a controller that is going to
suspended state, and will later be used by mdev
framework to detect this and flush its queues

Signed-off-by: Maxim Levitsky <mlevitsk@xxxxxxxxxx>
---
 drivers/nvme/host/core.c | 15 +++++++++++++++
 drivers/nvme/host/nvme.h |  1 +
 2 files changed, 16 insertions(+)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 2e11d014d514..22db0c51a0bf 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -317,6 +317,19 @@ bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl,
 		switch (old_state) {
 		case NVME_CTRL_NEW:
 		case NVME_CTRL_RESETTING:
+		case NVME_CTRL_CONNECTING:
+		case NVME_CTRL_SUSPENDED:
+			changed = true;
+			/* FALLTHRU */
+		default:
+			break;
+		}
+		break;
+	case NVME_CTRL_SUSPENDED:
+		switch (old_state) {
+		case NVME_CTRL_NEW:
+		case NVME_CTRL_LIVE:
+		case NVME_CTRL_RESETTING:
 		case NVME_CTRL_CONNECTING:
 			changed = true;
 			/* FALLTHRU */
@@ -329,6 +342,7 @@ bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl,
 		case NVME_CTRL_NEW:
 		case NVME_CTRL_LIVE:
 		case NVME_CTRL_ADMIN_ONLY:
+		case NVME_CTRL_SUSPENDED:
 			changed = true;
 			/* FALLTHRU */
 		default:
@@ -351,6 +365,7 @@ bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl,
 		case NVME_CTRL_ADMIN_ONLY:
 		case NVME_CTRL_RESETTING:
 		case NVME_CTRL_CONNECTING:
+		case NVME_CTRL_SUSPENDED:
 			changed = true;
 			/* FALLTHRU */
 		default:
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index 527d64545023..d040eb00e880 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -139,6 +139,7 @@ static inline u16 nvme_req_qid(struct request *req)
 enum nvme_ctrl_state {
 	NVME_CTRL_NEW,
 	NVME_CTRL_LIVE,
+	NVME_CTRL_SUSPENDED,
 	NVME_CTRL_ADMIN_ONLY,    /* Only admin queue live */
 	NVME_CTRL_RESETTING,
 	NVME_CTRL_CONNECTING,
-- 
2.17.2