diff --git a/drivers/firewire/fw-sbp2.c b/drivers/firewire/fw-sbp2.c
index 3e4a369d0057f..ba816ef6def1b 100644
--- a/drivers/firewire/fw-sbp2.c
+++ b/drivers/firewire/fw-sbp2.c
@@ -984,6 +984,7 @@ static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done)
 	struct fw_unit *unit = sd->unit;
 	struct fw_device *device = fw_device(unit->device.parent);
 	struct sbp2_command_orb *orb;
+	unsigned max_payload;
 
 	/*
 	 * Bidirectional commands are not yet implemented, and unknown
@@ -1017,8 +1018,10 @@ static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done)
 	 * specifies the max payload size as 2 ^ (max_payload + 2), so
 	 * if we set this to max_speed + 7, we get the right value.
 	 */
+	max_payload = min(device->max_speed + 7,
+			  device->card->max_receive - 1);
 	orb->request.misc =
-		COMMAND_ORB_MAX_PAYLOAD(device->max_speed + 7) |
+		COMMAND_ORB_MAX_PAYLOAD(max_payload) |
 		COMMAND_ORB_SPEED(device->max_speed) |
 		COMMAND_ORB_NOTIFY;
 
diff --git a/drivers/firewire/fw-transaction.h b/drivers/firewire/fw-transaction.h
index 5ceaccd10564c..fa7967b574085 100644
--- a/drivers/firewire/fw-transaction.h
+++ b/drivers/firewire/fw-transaction.h
@@ -231,7 +231,7 @@ struct fw_card {
 	unsigned long reset_jiffies;
 
 	unsigned long long guid;
-	int max_receive;
+	unsigned max_receive;
 	int link_speed;
 	int config_rom_generation;