Macros with good names offer better readability.

Signed-off-by: Dingyan Li <18500469033@163.com>
---
v1 -> v2: remove contents unrelated to the patch subject.

 drivers/usb/storage/ene_ub6250.c | 8 ++++----
 drivers/usb/storage/realtek_cr.c | 4 ++--
 drivers/usb/storage/transport.c  | 2 +-
 3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/usb/storage/ene_ub6250.c b/drivers/usb/storage/ene_ub6250.c
index a4bfbecbf16c..fd46e81388d2 100644
--- a/drivers/usb/storage/ene_ub6250.c
+++ b/drivers/usb/storage/ene_ub6250.c
@@ -737,7 +737,7 @@ static int sd_scsi_write(struct us_data *us, struct scsi_cmnd *srb)
 	memset(bcb, 0, sizeof(struct bulk_cb_wrap));
 	bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
 	bcb->DataTransferLength = blenByte;
-	bcb->Flags  = 0x00;
+	bcb->Flags  = US_BULK_FLAG_OUT;
 	bcb->CDB[0] = 0xF0;
 	bcb->CDB[5] = (unsigned char)(bnByte);
 	bcb->CDB[4] = (unsigned char)(bnByte>>8);
@@ -1163,7 +1163,7 @@ static int ms_read_copyblock(struct us_data *us, u16 oldphy, u16 newphy,
 	memset(bcb, 0, sizeof(struct bulk_cb_wrap));
 	bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
 	bcb->DataTransferLength = 0x200*len;
-	bcb->Flags = 0x00;
+	bcb->Flags = US_BULK_FLAG_OUT;
 	bcb->CDB[0] = 0xF0;
 	bcb->CDB[1] = 0x08;
 	bcb->CDB[4] = (unsigned char)(oldphy);
@@ -1759,7 +1759,7 @@ static int ms_scsi_write(struct us_data *us, struct scsi_cmnd *srb)
 		memset(bcb, 0, sizeof(struct bulk_cb_wrap));
 		bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
 		bcb->DataTransferLength = blenByte;
-		bcb->Flags  = 0x00;
+		bcb->Flags  = US_BULK_FLAG_OUT;
 		bcb->CDB[0] = 0xF0;
 		bcb->CDB[1] = 0x04;
 		bcb->CDB[5] = (unsigned char)(bn);
@@ -1931,7 +1931,7 @@ static int ene_load_bincode(struct us_data *us, unsigned char flag)
 	memset(bcb, 0, sizeof(struct bulk_cb_wrap));
 	bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
 	bcb->DataTransferLength = sd_fw->size;
-	bcb->Flags = 0x00;
+	bcb->Flags = US_BULK_FLAG_OUT;
 	bcb->CDB[0] = 0xEF;
 
 	result = ene_send_scsi_cmd(us, FDIR_WRITE, buf, 0);
diff --git a/drivers/usb/storage/realtek_cr.c b/drivers/usb/storage/realtek_cr.c
index 0c423916d7bf..54ffff86c6fa 100644
--- a/drivers/usb/storage/realtek_cr.c
+++ b/drivers/usb/storage/realtek_cr.c
@@ -212,7 +212,7 @@ static int rts51x_bulk_transport(struct us_data *us, u8 lun,
 	/* set up the command wrapper */
 	bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
 	bcb->DataTransferLength = cpu_to_le32(buf_len);
-	bcb->Flags = (dir == DMA_FROM_DEVICE) ? US_BULK_FLAG_IN : 0;
+	bcb->Flags = (dir == DMA_FROM_DEVICE) ? US_BULK_FLAG_IN : US_BULK_FLAG_OUT;
 	bcb->Tag = ++us->tag;
 	bcb->Lun = lun;
 	bcb->Length = cmd_len;
@@ -301,7 +301,7 @@ static int rts51x_bulk_transport_special(struct us_data *us, u8 lun,
 	/* set up the command wrapper */
 	bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
 	bcb->DataTransferLength = cpu_to_le32(buf_len);
-	bcb->Flags = (dir == DMA_FROM_DEVICE) ? US_BULK_FLAG_IN : 0;
+	bcb->Flags = (dir == DMA_FROM_DEVICE) ? US_BULK_FLAG_IN : US_BULK_FLAG_OUT;
 	bcb->Tag = ++us->tag;
 	bcb->Lun = lun;
 	bcb->Length = cmd_len;
diff --git a/drivers/usb/storage/transport.c b/drivers/usb/storage/transport.c
index 7449e379077a..9d767f6bf722 100644
--- a/drivers/usb/storage/transport.c
+++ b/drivers/usb/storage/transport.c
@@ -1133,7 +1133,7 @@ int usb_stor_Bulk_transport(struct scsi_cmnd *srb, struct us_data *us)
 	bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
 	bcb->DataTransferLength = cpu_to_le32(transfer_length);
 	bcb->Flags = srb->sc_data_direction == DMA_FROM_DEVICE ?
-		US_BULK_FLAG_IN : 0;
+		US_BULK_FLAG_IN : US_BULK_FLAG_OUT;
 	bcb->Tag = ++us->tag;
 	bcb->Lun = srb->device->lun;
 	if (us->fflags & US_FL_SCM_MULT_TARG)
-- 
2.25.1