nvme: fix miss command type check

BugLink: https://bugs.launchpad.net/bugs/2065435

commit 31a5978 upstream.

In the function nvme_passthru_end(), only the value of the command
opcode is checked, without checking the command type (IO command or
Admin command). When we send a Dataset Management command (The opcode
of the Dataset Management command is the same as the Set Feature
command), kernel thinks it is a set feature command, then sets the
controller's keep alive interval, and calls nvme_keep_alive_work().

Signed-off-by: min15.li <[email protected]>
Reviewed-by: Kanchan Joshi <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Signed-off-by: Keith Busch <[email protected]>
Fixes: b58da2d ("nvme: update keep alive interval when kato is modified")
Signed-off-by: Tokunori Ikegami <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Signed-off-by: Manuel Diewald <[email protected]>
Signed-off-by: Roxana Nicolescu <[email protected]>

Author: min15.li

drivers/nvme/host/core.c

@@ -1185,7 +1185,7 @@ static u32 nvme_passthru_start(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
 	return effects;
 }
 
-static void nvme_passthru_end(struct nvme_ctrl *ctrl, u32 effects,
+static void nvme_passthru_end(struct nvme_ctrl *ctrl, struct nvme_ns *ns, u32 effects,
 			      struct nvme_command *cmd, int status)
 {
 	if (effects & NVME_CMD_EFFECTS_CSE_MASK) {
@@ -1201,6 +1201,8 @@ static void nvme_passthru_end(struct nvme_ctrl *ctrl, u32 effects,
 		nvme_queue_scan(ctrl);
 		flush_work(&ctrl->scan_work);
 	}
+	if (ns)
+		return;
 
 	switch (cmd->common.opcode) {
 	case nvme_admin_set_features:
@@ -1235,7 +1237,7 @@ int nvme_execute_passthru_rq(struct request *rq)
 	effects = nvme_passthru_start(ctrl, ns, cmd->common.opcode);
 	ret = nvme_execute_rq(disk, rq, false);
 	if (effects) /* nothing to be done for zero cmd effects */
-		nvme_passthru_end(ctrl, effects, cmd, ret);
+		nvme_passthru_end(ctrl, ns, effects, cmd, ret);
 
 	return ret;
 }