ide-tape: struct idetape_tape_t: remove unused members

- last_frame_position: only being written to once
- firmware_revision, product_id, vendor_id: used once, remove from struct
  idetape_tape_t and deal with them locally
- firmware_revision_num: only written to once
- tape_still_time_begin: completely unused
- tape_still_time: never written to; remove corresponding code chunk
- uncontrolled_last_pipeline_head: only once written to
- blocks_in_buffer: only written to

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

drivers/ide/ide-tape.c

@@ -311,8 +311,6 @@ typedef struct ide_tape_obj {
 	u8 partition;
 	/* Current block */
 	unsigned int first_frame_position;
-	unsigned int last_frame_position;
-	unsigned int blocks_in_buffer;
 
 	/*
 	 *	Last error information
@@ -399,11 +397,6 @@ typedef struct ide_tape_obj {
 	int avg_size;
 	int avg_speed;
 
-	char vendor_id[10];
-	char product_id[18];
-	char firmware_revision[6];
-	int firmware_revision_num;
-
 	/* the door is currently locked */
 	int door_locked;
 	/* the tape hardware is write protected */
@@ -440,12 +433,6 @@ typedef struct ide_tape_obj {
 	int max_insert_speed;
 	int measure_insert_time;
 
-	/*
-	 * Measure tape still time, in milliseconds
-	 */
-	unsigned long tape_still_time_begin;
-	int tape_still_time;
-
 	/*
 	 * Speed regulation negative feedback loop
 	 */
@@ -454,7 +441,6 @@ typedef struct ide_tape_obj {
 	int controlled_pipeline_head_speed;
 	int uncontrolled_pipeline_head_speed;
 	int controlled_last_pipeline_head;
-	int uncontrolled_last_pipeline_head;
 	unsigned long uncontrolled_pipeline_head_time;
 	unsigned long controlled_pipeline_head_time;
 	int controlled_previous_pipeline_head;
@@ -1696,8 +1682,6 @@ static ide_startstop_t idetape_do_request(ide_drive_t *drive,
 		drive->post_reset = 0;
 	}
 
-	if (tape->tape_still_time > 100 && tape->tape_still_time < 200)
-		tape->measure_insert_time = 1;
 	if (time_after(jiffies, tape->insert_time))
 		tape->insert_speed = tape->insert_size / 1024 * HZ / (jiffies - tape->insert_time);
 	idetape_calculate_speeds(drive);
@@ -2009,9 +1993,6 @@ static ide_startstop_t idetape_read_position_callback(ide_drive_t *drive)
 			tape->partition = readpos[1];
 			tape->first_frame_position =
 				be32_to_cpu(*(u32 *)&readpos[4]);
-			tape->last_frame_position =
-				be32_to_cpu(*(u32 *)&readpos[8]);
-			tape->blocks_in_buffer = readpos[15];
 			set_bit(IDETAPE_ADDRESS_VALID, &tape->flags);
 			idetape_end_request(drive, 1, 0);
 		}
@@ -2540,7 +2521,7 @@ static void idetape_restart_speed_control (ide_drive_t *drive)
 
 	tape->restart_speed_control_req = 0;
 	tape->pipeline_head = 0;
-	tape->controlled_last_pipeline_head = tape->uncontrolled_last_pipeline_head = 0;
+	tape->controlled_last_pipeline_head = 0;
 	tape->controlled_previous_pipeline_head = tape->uncontrolled_previous_pipeline_head = 0;
 	tape->pipeline_head_speed = tape->controlled_pipeline_head_speed = 5000;
 	tape->uncontrolled_pipeline_head_speed = 0;
@@ -3438,30 +3419,26 @@ static int idetape_identify_device (ide_drive_t *drive)
 
 static void idetape_get_inquiry_results(ide_drive_t *drive)
 {
-	char *r;
 	idetape_tape_t *tape = drive->driver_data;
 	idetape_pc_t pc;
+	char fw_rev[6], vendor_id[10], product_id[18];
 
 	idetape_create_inquiry_cmd(&pc);
 	if (idetape_queue_pc_tail(drive, &pc)) {
 		printk(KERN_ERR "ide-tape: %s: can't get INQUIRY results\n",
 				tape->name);
 		return;
 	}
-	memcpy(tape->vendor_id, &pc.buffer[8], 8);
-	memcpy(tape->product_id, &pc.buffer[16], 16);
-	memcpy(tape->firmware_revision, &pc.buffer[32], 4);
-
-	ide_fixstring(tape->vendor_id, 10, 0);
-	ide_fixstring(tape->product_id, 18, 0);
-	ide_fixstring(tape->firmware_revision, 6, 0);
-	r = tape->firmware_revision;
-	if (*(r + 1) == '.')
-		tape->firmware_revision_num = (*r - '0') * 100 +
-			(*(r + 2) - '0') * 10 +	*(r + 3) - '0';
+	memcpy(vendor_id, &pc.buffer[8], 8);
+	memcpy(product_id, &pc.buffer[16], 16);
+	memcpy(fw_rev, &pc.buffer[32], 4);
+
+	ide_fixstring(vendor_id, 10, 0);
+	ide_fixstring(product_id, 18, 0);
+	ide_fixstring(fw_rev, 6, 0);
+
 	printk(KERN_INFO "ide-tape: %s <-> %s: %s %s rev %s\n",
-			drive->name, tape->name, tape->vendor_id,
-			tape->product_id, tape->firmware_revision);
+			drive->name, tape->name, vendor_id, product_id, fw_rev);
 }
 
 /*