firewire: sbp2: remove redundant check for bidi command

[Bart van Asche:]  SCSI core never sets cmd->sc_data_direction to
DMA_BIDIRECTIONAL; scsi_bidi_cmnd(cmd) should be used instead to
test for a bidirectional command.

[Christoph Hellwig:]  Bidirectional commands won't ever be queued
anyway, unless a LLD or transport driver sets QUEUE_FLAG_BIDI.

So, simply remove the respective queuecommand check in the SBP-2
transport driver.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>

drivers/firewire/sbp2.c

@@ -1463,17 +1463,6 @@ static int sbp2_scsi_queuecommand(struct Scsi_Host *shost,
 	struct sbp2_command_orb *orb;
 	int generation, retval = SCSI_MLQUEUE_HOST_BUSY;
 
-	/*
-	 * Bidirectional commands are not yet implemented, and unknown
-	 * transfer direction not handled.
-	 */
-	if (cmd->sc_data_direction == DMA_BIDIRECTIONAL) {
-		dev_err(lu_dev(lu), "cannot handle bidirectional command\n");
-		cmd->result = DID_ERROR << 16;
-		cmd->scsi_done(cmd);
-		return 0;
-	}
-
 	orb = kzalloc(sizeof(*orb), GFP_ATOMIC);
 	if (orb == NULL)
 		return SCSI_MLQUEUE_HOST_BUSY;