[SCSI] replace sizeof sense_buffer with SCSI_SENSE_BUFFERSIZE

This replaces sizeof sense_buffer with SCSI_SENSE_BUFFERSIZE in
several LLDs. It's a preparation for the future changes to remove
sense_buffer array in scsi_cmnd structure.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c
index 798b7e8..53cbaff 100644
--- a/drivers/scsi/qla2xxx/qla_isr.c
+++ b/drivers/scsi/qla2xxx/qla_isr.c
@@ -977,13 +977,13 @@
 			break;
 
 		/* Copy Sense Data into sense buffer. */
-		memset(cp->sense_buffer, 0, sizeof(cp->sense_buffer));
+		memset(cp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
 
 		if (!(scsi_status & SS_SENSE_LEN_VALID))
 			break;
 
-		if (sense_len >= sizeof(cp->sense_buffer))
-			sense_len = sizeof(cp->sense_buffer);
+		if (sense_len >= SCSI_SENSE_BUFFERSIZE)
+			sense_len = SCSI_SENSE_BUFFERSIZE;
 
 		CMD_ACTUAL_SNSLEN(cp) = sense_len;
 		sp->request_sense_length = sense_len;
@@ -1061,13 +1061,13 @@
 				break;
 
 			/* Copy Sense Data into sense buffer */
-			memset(cp->sense_buffer, 0, sizeof(cp->sense_buffer));
+			memset(cp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
 
 			if (!(scsi_status & SS_SENSE_LEN_VALID))
 				break;
 
-			if (sense_len >= sizeof(cp->sense_buffer))
-				sense_len = sizeof(cp->sense_buffer);
+			if (sense_len >= SCSI_SENSE_BUFFERSIZE)
+				sense_len = SCSI_SENSE_BUFFERSIZE;
 
 			CMD_ACTUAL_SNSLEN(cp) = sense_len;
 			sp->request_sense_length = sense_len;