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

Maxim Levitsky
2019-05-02T11:48:57Z

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@redhat.com>
---
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