nvmet: fix Identify Controller handling

The identify command with cns set to NVME_ID_CNS_CTRL does not depend on
the command set. The execution of this command should thus not look at
the csi specified in the command. Simplify nvmet_execute_identify() to
directly call nvmet_execute_identify_ctrl() without the csi switch-case.

Fixes: ab5d0b38 ("nvmet: add Command Set Identifier support")
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Tested-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

drivers/nvme/target/admin-cmd.c

@@ -705,11 +705,8 @@ static void nvmet_execute_identify(struct nvmet_req *req)
 		}
 		break;
 	case NVME_ID_CNS_CTRL:
-		switch (req->cmd->identify.csi) {
-		case NVME_CSI_NVM:
-			return nvmet_execute_identify_ctrl(req);
-		}
-		break;
+		nvmet_execute_identify_ctrl(req);
+		return;
 	case NVME_ID_CNS_CS_CTRL:
 		if (IS_ENABLED(CONFIG_BLK_DEV_ZONED)) {
 			switch (req->cmd->identify.csi) {