ehv_bytechan.c (69851e4ab8feeb369119a44ddca430c0ee15f0d8) ehv_bytechan.c (95713967ba52389f7cea75704d0cf048080ec218)
1// SPDX-License-Identifier: GPL-2.0
2/* ePAPR hypervisor byte channel device driver
3 *
4 * Copyright 2009-2011 Freescale Semiconductor, Inc.
5 *
6 * Author: Timur Tabi <timur@freescale.com>
7 *
8 * This driver support three distinct interfaces, all of which are related to

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461 * as possible.
462 *
463 * We don't need to worry about whether there is enough room in the buffer for
464 * all the data. The purpose of ehv_bc_tty_write_room() is to tell the tty
465 * layer how much data it can safely send to us. We guarantee that
466 * ehv_bc_tty_write_room() will never lie, so the tty layer will never send us
467 * too much data.
468 */
1// SPDX-License-Identifier: GPL-2.0
2/* ePAPR hypervisor byte channel device driver
3 *
4 * Copyright 2009-2011 Freescale Semiconductor, Inc.
5 *
6 * Author: Timur Tabi <timur@freescale.com>
7 *
8 * This driver support three distinct interfaces, all of which are related to

--- 452 unchanged lines hidden (view full) ---

461 * as possible.
462 *
463 * We don't need to worry about whether there is enough room in the buffer for
464 * all the data. The purpose of ehv_bc_tty_write_room() is to tell the tty
465 * layer how much data it can safely send to us. We guarantee that
466 * ehv_bc_tty_write_room() will never lie, so the tty layer will never send us
467 * too much data.
468 */
469static int ehv_bc_tty_write(struct tty_struct *ttys, const u8 *s, int count)
469static ssize_t ehv_bc_tty_write(struct tty_struct *ttys, const u8 *s,
470 size_t count)
470{
471 struct ehv_bc_data *bc = ttys->driver_data;
472 unsigned long flags;
473 unsigned int len;
474 unsigned int written = 0;
475
476 while (1) {
477 spin_lock_irqsave(&bc->lock, flags);

--- 340 unchanged lines hidden --- 		471{
472 struct ehv_bc_data *bc = ttys->driver_data;
473 unsigned long flags;
474 unsigned int len;
475 unsigned int written = 0;
476
477 while (1) {
478 spin_lock_irqsave(&bc->lock, flags);

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