diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c
index 41b1f81b1651690986ab55dcc3f48b3f39c96367..c2bb53e3d941faee5d29f5902ac757093102d772 100644
--- a/drivers/scsi/st.c
+++ b/drivers/scsi/st.c
@@ -631,7 +631,7 @@ static int cross_eof(struct scsi_tape * STp, int forward)
 /* Flush the write buffer (never need to write if variable blocksize). */
 static int st_flush_write_buffer(struct scsi_tape * STp)
 {
-	int offset, transfer, blks;
+	int transfer, blks;
 	int result;
 	unsigned char cmd[MAX_COMMAND_SIZE];
 	struct st_request *SRpnt;
@@ -644,14 +644,10 @@ static int st_flush_write_buffer(struct scsi_tape * STp)
 	result = 0;
 	if (STp->dirty == 1) {
 
-		offset = (STp->buffer)->buffer_bytes;
-		transfer = ((offset + STp->block_size - 1) /
-			    STp->block_size) * STp->block_size;
+		transfer = STp->buffer->buffer_bytes;
                 DEBC(printk(ST_DEB_MSG "%s: Flushing %d bytes.\n",
                                tape_name(STp), transfer));
 
-		memset((STp->buffer)->b_data + offset, 0, transfer - offset);
-
 		memset(cmd, 0, MAX_COMMAND_SIZE);
 		cmd[0] = WRITE_6;
 		cmd[1] = 1;