ide-floppy: use an xfer_func_t and io_buf_t typedefs in order to unify rw

Also, move xfer_func_t typedef to the ide.h since it is used by two drivers
now (more coming).

Bart:
- use __func__ while at it
Signed-off-by: Borislav Petkov <bbpetkov@yahoo.de>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

drivers/ide/ide-cd.c

@@ -604,8 +604,6 @@ static ide_startstop_t cdrom_transfer_packet_command (ide_drive_t *drive,
  * Block read functions.
  */
 
-typedef void (xfer_func_t)(ide_drive_t *, void *, u32);
-
 static void ide_cd_pad_transfer(ide_drive_t *drive, xfer_func_t *xf, int len)
 {
 	while (len > 0) {

drivers/ide/ide-floppy.c

@@ -516,16 +516,17 @@ static void idefloppy_retry_pc (ide_drive_t *drive)
 	idefloppy_queue_pc_head(drive, pc, rq);
 }
 
-/*
- *	idefloppy_pc_intr is the usual interrupt handler which will be called
- *	during a packet command.
- */
+typedef void (io_buf_t)(ide_drive_t *, idefloppy_pc_t *, unsigned int);
+
+/* The usual interrupt handler called during a packet command. */
 static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
 {
 	idefloppy_floppy_t *floppy = drive->driver_data;
 	ide_hwif_t *hwif = drive->hwif;
 	idefloppy_pc_t *pc = floppy->pc;
 	struct request *rq = pc->rq;
+	xfer_func_t *xferfunc;
+	io_buf_t *iobuf_func;
 	unsigned int temp;
 	int dma_error = 0;
 	u16 bcount;
@@ -592,7 +593,7 @@ static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
 	ireason = hwif->INB(IDE_IREASON_REG);
 
 	if (ireason & CD) {
-		printk(KERN_ERR "ide-floppy: CoD != 0 in idefloppy_pc_intr\n");
+		printk(KERN_ERR "ide-floppy: CoD != 0 in %s\n", __func__);
 		return ide_do_reset(drive);
 	}
 	if (((ireason & IO) == IO) == test_bit(PC_WRITING, &pc->flags)) {
@@ -624,20 +625,18 @@ static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
 		}
 	}
 	if (test_bit(PC_WRITING, &pc->flags)) {
-		if (pc->buffer != NULL)
-			/* Write the current buffer */
-			hwif->atapi_output_bytes(drive, pc->current_position,
-						 bcount);
-		else
-			idefloppy_output_buffers(drive, pc, bcount);
+		xferfunc = hwif->atapi_output_bytes;
+		iobuf_func = &idefloppy_output_buffers;
 	} else {
-		if (pc->buffer != NULL)
-			/* Read the current buffer */
-			hwif->atapi_input_bytes(drive, pc->current_position,
-						bcount);
-		else
-			idefloppy_input_buffers(drive, pc, bcount);
+		xferfunc = hwif->atapi_input_bytes;
+		iobuf_func = &idefloppy_input_buffers;
 	}
+
+	if (pc->buffer)
+		xferfunc(drive, pc->current_position, bcount);
+	else
+		iobuf_func(drive, pc, bcount);
+
 	/* Update the current position */
 	pc->actually_transferred += bcount;
 	pc->current_position += bcount;

include/linux/ide.h

@@ -627,6 +627,9 @@ typedef struct hwif_s {
 typedef ide_startstop_t (ide_handler_t)(ide_drive_t *);
 typedef int (ide_expiry_t)(ide_drive_t *);
 
+/* used by ide-cd, ide-floppy, etc. */
+typedef void (xfer_func_t)(ide_drive_t *, void *, u32);
+
 typedef struct hwgroup_s {
 		/* irq handler, if active */
 	ide_startstop_t	(*handler)(ide_drive_t *);