[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/aha1542.c b/drivers/scsi/aha1542.c
index 5b69a88..190568e 100644
--- a/drivers/scsi/aha1542.c
+++ b/drivers/scsi/aha1542.c
@@ -536,7 +536,7 @@
 		   we will still have it in the cdb when we come back */
 		if (ccb[mbo].tarstat == 2)
 			memcpy(SCtmp->sense_buffer, &ccb[mbo].cdb[ccb[mbo].cdblen],
-			       sizeof(SCtmp->sense_buffer));
+			       SCSI_SENSE_BUFFERSIZE);
 
 
 		/* is there mail :-) */
@@ -609,7 +609,7 @@
 #if 0
 		/* scsi_request_sense() provides a buffer of size 256,
 		   so there is no reason to expect equality */
-		if (bufflen != sizeof(SCpnt->sense_buffer))
+		if (bufflen != SCSI_SENSE_BUFFERSIZE)
 			printk(KERN_CRIT "aha1542: Wrong buffer length supplied "
 			       "for request sense (%d)\n", bufflen);
 #endif