target: Remove unnecessary *cdb transport_get_lun_for_cmd parameter

This patch removes the now unnecessary 'unsigned char *cdb' function
parameter from transport_get_lun_for_cmd().  This also includes updating
lio-target, tcm_loop and tcm_fc usage of transport_get_lun_for_cmd().
Reported-by: Fubo Chen <fubo.chen@gmail.com>
Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>

drivers/target/loopback/tcm_loop.c

@@ -122,7 +122,7 @@ static struct se_cmd *tcm_loop_allocate_core_cmd(
 	/*
 	 * Locate the struct se_lun pointer and attach it to struct se_cmd
 	 */
-	if (transport_get_lun_for_cmd(se_cmd, NULL, tl_cmd->sc->device->lun) < 0) {
+	if (transport_get_lun_for_cmd(se_cmd, tl_cmd->sc->device->lun) < 0) {
 		kmem_cache_free(tcm_loop_cmd_cache, tl_cmd);
 		set_host_byte(sc, DID_NO_CONNECT);
 		return NULL;

drivers/target/target_core_device.c

@@ -56,7 +56,6 @@ static void se_dev_stop(struct se_device *dev);
 
 int transport_get_lun_for_cmd(
 	struct se_cmd *se_cmd,
-	unsigned char *cdb,
 	u32 unpacked_lun)
 {
 	struct se_dev_entry *deve;

drivers/target/tcm_fc/tfc_cmd.c

@@ -637,7 +637,7 @@ static void ft_send_cmd(struct ft_cmd *cmd)
 	fc_seq_exch(cmd->seq)->lp->tt.seq_set_resp(cmd->seq, ft_recv_seq, cmd);
 
 	cmd->lun = scsilun_to_int((struct scsi_lun *)fcp->fc_lun);
-	ret = transport_get_lun_for_cmd(&cmd->se_cmd, NULL, cmd->lun);
+	ret = transport_get_lun_for_cmd(&cmd->se_cmd, cmd->lun);
 	if (ret < 0) {
 		ft_dump_cmd(cmd, __func__);
 		transport_send_check_condition_and_sense(&cmd->se_cmd,

include/target/target_core_device.h

 #ifndef TARGET_CORE_DEVICE_H
 #define TARGET_CORE_DEVICE_H
 
-extern int transport_get_lun_for_cmd(struct se_cmd *, unsigned char *, u32);
+extern int transport_get_lun_for_cmd(struct se_cmd *, u32);
 extern int transport_get_lun_for_tmr(struct se_cmd *, u32);
 extern struct se_dev_entry *core_get_se_deve_from_rtpi(
 					struct se_node_acl *, u16);