libnvdimm: passthru functions clear to send

Have dsm functions called via the pass thru mechanism also
be checked against clear to send.
Signed-off-by: NJerry Hoemann <jerry.hoemann@hpe.com>
Signed-off-by: NDan Williams <dan.j.williams@intel.com>

drivers/nvdimm/bus.c

@@ -910,6 +910,7 @@ static int __nd_ioctl(struct nvdimm_bus *nvdimm_bus, struct nvdimm *nvdimm,
 	static char in_env[ND_CMD_MAX_ENVELOPE];
 	const struct nd_cmd_desc *desc = NULL;
 	unsigned int cmd = _IOC_NR(ioctl_cmd);
+	unsigned int func = cmd;
 	void __user *p = (void __user *) arg;
 	struct device *dev = &nvdimm_bus->dev;
 	struct nd_cmd_pkg pkg;
@@ -975,6 +976,7 @@ static int __nd_ioctl(struct nvdimm_bus *nvdimm_bus, struct nvdimm *nvdimm,
 	}
 
 	if (cmd == ND_CMD_CALL) {
+		func = pkg.nd_command;
 		dev_dbg(dev, "%s:%s, idx: %llu, in: %zu, out: %zu, len %zu\n",
 				__func__, dimm_name, pkg.nd_command,
 				in_len, out_len, buf_len);
@@ -1023,7 +1025,7 @@ static int __nd_ioctl(struct nvdimm_bus *nvdimm_bus, struct nvdimm *nvdimm,
 	}
 
 	nvdimm_bus_lock(&nvdimm_bus->dev);
-	rc = nd_cmd_clear_to_send(nvdimm_bus, nvdimm, cmd, buf);
+	rc = nd_cmd_clear_to_send(nvdimm_bus, nvdimm, func, buf);
 	if (rc)
 		goto out_unlock;