ide-tape: remove struct idetape_parameter_block_descriptor_t

Also, shorten function name idetape_get_blocksize_from_block_descriptor() and
move its definition up thereby getting rid of its forward declaration.

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

drivers/ide/ide-tape.c

@@ -677,18 +677,6 @@ typedef struct {
 #define IDETAPE_BLOCK_SIZE_PAGE		0x30
 #define IDETAPE_BUFFER_FILLING_PAGE	0x33
 
-/*
- *	Mode Parameter Block Descriptor the MODE SENSE packet command
- *
- *	Support for block descriptors is optional.
- */
-typedef struct {
-	__u8		density_code;		/* Medium density code */
-	__u8		blocks[3];		/* Number of blocks */
-	__u8		reserved4;		/* Reserved */
-	__u8		length[3];		/* Block Length */
-} idetape_parameter_block_descriptor_t;
-
 /*
  *	Run time configurable parameters.
  */
@@ -3503,7 +3491,30 @@ static int idetape_chrdev_ioctl (struct inode *inode, struct file *file, unsigne
 	}
 }
 
-static void idetape_get_blocksize_from_block_descriptor(ide_drive_t *drive);
+/*
+ * Do a mode sense page 0 with block descriptor and if it succeeds set the tape
+ * block size with the reported value.
+ */
+static void ide_tape_get_bsize_from_bdesc(ide_drive_t *drive)
+{
+	idetape_tape_t *tape = drive->driver_data;
+	idetape_pc_t pc;
+
+	idetape_create_mode_sense_cmd(&pc, IDETAPE_BLOCK_DESCRIPTOR);
+	if (idetape_queue_pc_tail(drive, &pc)) {
+		printk(KERN_ERR "ide-tape: Can't get block descriptor\n");
+		if (tape->tape_block_size == 0) {
+			printk(KERN_WARNING "ide-tape: Cannot deal with zero "
+					    "block size, assuming 32k\n");
+			tape->tape_block_size = 32768;
+		}
+		return;
+	}
+	tape->tape_block_size = (pc.buffer[4 + 5] << 16) +
+				(pc.buffer[4 + 6] << 8)  +
+				 pc.buffer[4 + 7];
+	tape->drv_write_prot = (pc.buffer[2] & 0x80) >> 7;
+}
 
 /*
  *	Our character device open function.
@@ -3557,7 +3568,7 @@ static int idetape_chrdev_open (struct inode *inode, struct file *filp)
 		clear_bit(IDETAPE_PIPELINE_ERROR, &tape->flags);
 
 	/* Read block size and write protect status from drive. */
-	idetape_get_blocksize_from_block_descriptor(drive);
+	ide_tape_get_bsize_from_bdesc(drive);
 
 	/* Set write protect flag if device is opened as read-only. */
 	if ((filp->f_flags & O_ACCMODE) == O_RDONLY)
@@ -3771,31 +3782,6 @@ static void idetape_get_mode_sense_results (ide_drive_t *drive)
 		tape->tape_block_size = 1024;
 }
 
-/*
- *	ide_get_blocksize_from_block_descriptor does a mode sense page 0 with block descriptor
- *	and if it succeeds sets the tape block size with the reported value
- */
-static void idetape_get_blocksize_from_block_descriptor(ide_drive_t *drive)
-{
-
-	idetape_tape_t *tape = drive->driver_data;
-	idetape_pc_t pc;
-	idetape_parameter_block_descriptor_t *block_descrp;
-
-	idetape_create_mode_sense_cmd(&pc, IDETAPE_BLOCK_DESCRIPTOR);
-	if (idetape_queue_pc_tail(drive, &pc)) {
-		printk(KERN_ERR "ide-tape: Can't get block descriptor\n");
-		if (tape->tape_block_size == 0) {
-			printk(KERN_WARNING "ide-tape: Cannot deal with zero block size, assume 32k\n");
-			tape->tape_block_size =  32768;
-		}
-		return;
-	}
-	block_descrp = (idetape_parameter_block_descriptor_t *)(pc.buffer + 4);
-	tape->tape_block_size =( block_descrp->length[0]<<16) + (block_descrp->length[1]<<8) + block_descrp->length[2];
-	tape->drv_write_prot = (pc.buffer[2] & 0x80) >> 7;
-}
-
 #ifdef CONFIG_IDE_PROC_FS
 static void idetape_add_settings (ide_drive_t *drive)
 {
@@ -3872,7 +3858,7 @@ static void idetape_setup (ide_drive_t *drive, idetape_tape_t *tape, int minor)
 
 	idetape_get_inquiry_results(drive);
 	idetape_get_mode_sense_results(drive);
-	idetape_get_blocksize_from_block_descriptor(drive);
+	ide_tape_get_bsize_from_bdesc(drive);
 	tape->user_bs_factor = 1;
 	tape->stage_size = *ctl * tape->tape_block_size;
 	while (tape->stage_size > 0xffff) {