nvme: check whether the process is already added at the probe phase

}

/**

 * This function will be called when a new process is using the controller.

 * This function will be called when a process is using the controller.

 *  1. For the primary process, it is called when constructing the controller.

 *  2. For the secondary process, it is called at probing the controller.

 * Note: will check whether the process is already added for the same process.

 */

int

nvme_ctrlr_add_process(struct spdk_nvme_ctrlr *ctrlr, void *devhandle)

{

	struct spdk_nvme_ctrlr_process	*ctrlr_proc;

	struct spdk_nvme_ctrlr_process	*ctrlr_proc, *active_proc;

	pid_t				pid = getpid();

	/* Check whether the process is already added or not */

	TAILQ_FOREACH(active_proc, &ctrlr->active_procs, tailq) {

		if (active_proc->pid == pid) {

			return 0;

		}

	}

	/* Initialize the per process properties for this ctrlr */

	ctrlr_proc = spdk_zmalloc(sizeof(struct spdk_nvme_ctrlr_process), 64, NULL);

	}

	ctrlr_proc->is_primary = spdk_process_is_primary();

	ctrlr_proc->pid = getpid();

	ctrlr_proc->pid = pid;

	STAILQ_INIT(&ctrlr_proc->active_reqs);

	ctrlr_proc->devhandle = devhandle;

	ctrlr_proc->ref = 0;