ide-floppy: use ide_pio_bytes()

Index: b/drivers/ide/ide-atapi.c
===================================================================
@@ -69,49 +69,6 @@ int ide_check_atapi_device(ide_drive_t *
 }
 EXPORT_SYMBOL_GPL(ide_check_atapi_device);
 
-/* PIO data transfer routine using the scatter gather table. */
-int ide_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
-		    unsigned int bcount, int write)
-{
-	ide_hwif_t *hwif = drive->hwif;
-	const struct ide_tp_ops *tp_ops = hwif->tp_ops;
-	xfer_func_t *xf = write ? tp_ops->output_data : tp_ops->input_data;
-	struct scatterlist *sg = pc->sg;
-	char *buf;
-	int count, done = 0;
-
-	while (bcount) {
-		count = min(sg->length - pc->b_count, bcount);
-
-		if (PageHighMem(sg_page(sg))) {
-			unsigned long flags;
-
-			local_irq_save(flags);
-			buf = kmap_atomic(sg_page(sg), KM_IRQ0) + sg->offset;
-			xf(drive, NULL, buf + pc->b_count, count);
-			kunmap_atomic(buf - sg->offset, KM_IRQ0);
-			local_irq_restore(flags);
-		} else {
-			buf = sg_virt(sg);
-			xf(drive, NULL, buf + pc->b_count, count);
-		}
-
-		bcount -= count;
-		pc->b_count += count;
-		done += count;
-
-		if (pc->b_count == sg->length) {
-			if (!--pc->sg_cnt)
-				break;
-			pc->sg = sg = sg_next(sg);
-			pc->b_count = 0;
-		}
-	}
-
-	return done;
-}
-EXPORT_SYMBOL_GPL(ide_io_buffers);
-
 void ide_init_pc(struct ide_atapi_pc *pc)
 {
 	memset(pc, 0, sizeof(*pc));

@@ -305,6 +262,7 @@ static ide_startstop_t ide_pc_intr(ide_d
 {
 	struct ide_atapi_pc *pc = drive->pc;
 	ide_hwif_t *hwif = drive->hwif;
+	struct ide_cmd *cmd = &hwif->cmd;
 	struct request *rq = hwif->rq;
 	const struct ide_tp_ops *tp_ops = hwif->tp_ops;
 	xfer_func_t *xferfunc;

@@ -426,14 +384,13 @@ static ide_startstop_t ide_pc_intr(ide_d
 
 	xferfunc = write ? tp_ops->output_data : tp_ops->input_data;
 
-	if ((drive->media == ide_floppy && !pc->buf) ||
-	    (drive->media == ide_tape && pc->bh)) {
-		done = drive->pc_io_buffers(drive, pc, bcount, write);
-
+	if (drive->media == ide_floppy && pc->buf == NULL) {
+		done = min_t(unsigned int, bcount, cmd->nleft);
+		ide_pio_bytes(drive, cmd, write, done);
 		/* FIXME: don't do partial completions */
-		if (drive->media == ide_floppy)
-			ide_complete_rq(drive, 0,
-					done ? done : ide_rq_bytes(rq));
+		ide_complete_rq(drive, 0, done ? done : ide_rq_bytes(rq));
+	} else if (drive->media == ide_tape && pc->bh) {
+		done = drive->pc_io_buffers(drive, pc, bcount, write);
 	} else {
 		done = min_t(unsigned int, bcount, pc->req_xfer - pc->xferred);
 		xferfunc(drive, NULL, pc->cur_pos, done);

Index: b/drivers/ide/ide-floppy.c
===================================================================
@@ -213,7 +213,6 @@ static void idefloppy_create_rw_cmd(ide_
 	memcpy(rq->cmd, pc->c, 12);
 
 	pc->rq = rq;
-	pc->b_count = 0;
 	if (rq->cmd_flags & REQ_RW)
 		pc->flags |= PC_FLAG_WRITING;
 	pc->buf = NULL;

@@ -227,7 +226,6 @@ static void idefloppy_blockpc_cmd(struct
 	ide_init_pc(pc);
 	memcpy(pc->c, rq->cmd, sizeof(pc->c));
 	pc->rq = rq;
-	pc->b_count = 0;
 	if (rq->data_len && rq_data_dir(rq) == WRITE)
 		pc->flags |= PC_FLAG_WRITING;
 	pc->buf = rq->data;

@@ -244,7 +242,6 @@ static ide_startstop_t ide_floppy_do_req
 					     struct request *rq, sector_t block)
 {
 	struct ide_disk_obj *floppy = drive->driver_data;
-	ide_hwif_t *hwif = drive->hwif;
 	struct ide_cmd cmd;
 	struct ide_atapi_pc *pc;
 

@@ -293,12 +290,9 @@ static ide_startstop_t ide_floppy_do_req
 
 	cmd.rq = rq;
 
-	ide_init_sg_cmd(&cmd, rq->nr_sectors << 9);
+	ide_init_sg_cmd(&cmd, pc->req_xfer);
 	ide_map_sg(drive, &cmd);
 
-	pc->sg = hwif->sg_table;
-	pc->sg_cnt = cmd.sg_nents;
-
 	pc->rq = rq;
 
 	return ide_floppy_issue_pc(drive, &cmd, pc);

@@ -484,7 +478,6 @@ static void ide_floppy_setup(ide_drive_t
 
 	drive->pc_callback	 = ide_floppy_callback;
 	drive->pc_update_buffers = idefloppy_update_buffers;
-	drive->pc_io_buffers	 = ide_io_buffers;
 
 	/*
 	 * We used to check revisions here. At this point however I'm giving up.

Index: b/include/linux/ide.h
===================================================================
@@ -414,9 +414,6 @@ struct ide_atapi_pc {
 	struct idetape_bh *bh;
 	char *b_data;
 
-	struct scatterlist *sg;
-	unsigned int sg_cnt;
-
 	unsigned long timeout;
 };
 

@@ -1172,8 +1169,6 @@ void ide_tf_read(ide_drive_t *, struct i
 void ide_input_data(ide_drive_t *, struct ide_cmd *, void *, unsigned int);
 void ide_output_data(ide_drive_t *, struct ide_cmd *, void *, unsigned int);
 
-int ide_io_buffers(ide_drive_t *, struct ide_atapi_pc *, unsigned int, int);
-
 extern void SELECT_DRIVE(ide_drive_t *);
 void SELECT_MASK(ide_drive_t *, int);