From: Dudley Du Date: Thu, 4 Dec 2014 15:00:03 +0000 (-0800) Subject: Input: cyapa - use 'error' for error codes X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=823a11fdbde32f9efba48093dca74fe81010a265;p=deliverable%2Flinux.git Input: cyapa - use 'error' for error codes Let's use 'error' variable instead of 'ret' when we need to store erro codes. Signed-off-by: Dudley Du Signed-off-by: Dmitry Torokhov --- diff --git a/drivers/input/mouse/cyapa.c b/drivers/input/mouse/cyapa.c index 94e73275af04..1bece8cad46f 100644 --- a/drivers/input/mouse/cyapa.c +++ b/drivers/input/mouse/cyapa.c @@ -6,7 +6,7 @@ * Daniel Kurtz * Benson Leung * - * Copyright (C) 2011-2012 Cypress Semiconductor, Inc. + * Copyright (C) 2011-2014 Cypress Semiconductor, Inc. * Copyright (C) 2011-2012 Google, Inc. * * This file is subject to the terms and conditions of the GNU General Public @@ -421,8 +421,8 @@ static ssize_t cyapa_read_block(struct cyapa *cyapa, u8 cmd_idx, u8 *values) */ static int cyapa_get_state(struct cyapa *cyapa) { - int ret; u8 status[BL_STATUS_SIZE]; + int error; cyapa->state = CYAPA_STATE_NO_DEVICE; @@ -432,18 +432,18 @@ static int cyapa_get_state(struct cyapa *cyapa) * If the device is in operation mode, this will be the DATA regs. * */ - ret = cyapa_i2c_reg_read_block(cyapa, BL_HEAD_OFFSET, BL_STATUS_SIZE, - status); + error = cyapa_i2c_reg_read_block(cyapa, BL_HEAD_OFFSET, BL_STATUS_SIZE, + status); /* * On smbus systems in OP mode, the i2c_reg_read will fail with * -ETIMEDOUT. In this case, try again using the smbus equivalent * command. This should return a BL_HEAD indicating CYAPA_STATE_OP. */ - if (cyapa->smbus && (ret == -ETIMEDOUT || ret == -ENXIO)) - ret = cyapa_read_block(cyapa, CYAPA_CMD_BL_STATUS, status); + if (cyapa->smbus && (error == -ETIMEDOUT || error == -ENXIO)) + error = cyapa_read_block(cyapa, CYAPA_CMD_BL_STATUS, status); - if (ret != BL_STATUS_SIZE) + if (error != BL_STATUS_SIZE) goto error; if ((status[REG_OP_STATUS] & OP_STATUS_SRC) == OP_STATUS_SRC) { @@ -453,7 +453,7 @@ static int cyapa_get_state(struct cyapa *cyapa) cyapa->state = CYAPA_STATE_OP; break; default: - ret = -EAGAIN; + error = -EAGAIN; goto error; } } else { @@ -467,7 +467,7 @@ static int cyapa_get_state(struct cyapa *cyapa) return 0; error: - return (ret < 0) ? ret : -EAGAIN; + return (error < 0) ? error : -EAGAIN; } /* @@ -486,31 +486,31 @@ error: */ static int cyapa_poll_state(struct cyapa *cyapa, unsigned int timeout) { - int ret; + int error; int tries = timeout / 100; - ret = cyapa_get_state(cyapa); - while ((ret || cyapa->state >= CYAPA_STATE_BL_BUSY) && tries--) { + error = cyapa_get_state(cyapa); + while ((error || cyapa->state >= CYAPA_STATE_BL_BUSY) && tries--) { msleep(100); - ret = cyapa_get_state(cyapa); + error = cyapa_get_state(cyapa); } - return (ret == -EAGAIN || ret == -ETIMEDOUT) ? -ETIMEDOUT : ret; + return (error == -EAGAIN || error == -ETIMEDOUT) ? -ETIMEDOUT : error; } static int cyapa_bl_deactivate(struct cyapa *cyapa) { - int ret; + int error; - ret = cyapa_i2c_reg_write_block(cyapa, 0, sizeof(bl_deactivate), - bl_deactivate); - if (ret < 0) - return ret; + error = cyapa_i2c_reg_write_block(cyapa, 0, sizeof(bl_deactivate), + bl_deactivate); + if (error) + return error; /* wait for bootloader to switch to idle state; should take < 100ms */ msleep(100); - ret = cyapa_poll_state(cyapa, 500); - if (ret < 0) - return ret; + error = cyapa_poll_state(cyapa, 500); + if (error) + return error; if (cyapa->state != CYAPA_STATE_BL_IDLE) return -EAGAIN; return 0; @@ -531,11 +531,11 @@ static int cyapa_bl_deactivate(struct cyapa *cyapa) */ static int cyapa_bl_exit(struct cyapa *cyapa) { - int ret; + int error; - ret = cyapa_i2c_reg_write_block(cyapa, 0, sizeof(bl_exit), bl_exit); - if (ret < 0) - return ret; + error = cyapa_i2c_reg_write_block(cyapa, 0, sizeof(bl_exit), bl_exit); + if (error) + return error; /* * Wait for bootloader to exit, and operation mode to start. @@ -547,9 +547,9 @@ static int cyapa_bl_exit(struct cyapa *cyapa) * updated to new firmware, it must first calibrate its sensors, which * can take up to an additional 2 seconds. */ - ret = cyapa_poll_state(cyapa, 2000); - if (ret < 0) - return ret; + error = cyapa_poll_state(cyapa, 2000); + if (error < 0) + return error; if (cyapa->state != CYAPA_STATE_OP) return -EAGAIN; @@ -639,28 +639,28 @@ static int cyapa_check_is_operational(struct cyapa *cyapa) { struct device *dev = &cyapa->client->dev; static const char unique_str[] = "CYTRA"; - int ret; + int error; - ret = cyapa_poll_state(cyapa, 2000); - if (ret < 0) - return ret; + error = cyapa_poll_state(cyapa, 2000); + if (error) + return error; switch (cyapa->state) { case CYAPA_STATE_BL_ACTIVE: - ret = cyapa_bl_deactivate(cyapa); - if (ret) - return ret; + error = cyapa_bl_deactivate(cyapa); + if (error) + return error; /* Fallthrough state */ case CYAPA_STATE_BL_IDLE: - ret = cyapa_bl_exit(cyapa); - if (ret) - return ret; + error = cyapa_bl_exit(cyapa); + if (error) + return error; /* Fallthrough state */ case CYAPA_STATE_OP: - ret = cyapa_get_query_data(cyapa); - if (ret < 0) - return ret; + error = cyapa_get_query_data(cyapa); + if (error) + return error; /* only support firmware protocol gen3 */ if (cyapa->gen != CYAPA_GEN3) { @@ -790,7 +790,7 @@ static int cyapa_create_input_dev(struct cyapa *cyapa) input = devm_input_allocate_device(dev); if (!input) { - dev_err(dev, "allocate memory for input device failed\n"); + dev_err(dev, "failed to allocate memory for input device.\n"); return -ENOMEM; } @@ -798,7 +798,7 @@ static int cyapa_create_input_dev(struct cyapa *cyapa) input->phys = cyapa->phys; input->id.bustype = BUS_I2C; input->id.version = 1; - input->id.product = 0; /* means any product in eventcomm. */ + input->id.product = 0; /* Means any product in eventcomm. */ input->dev.parent = &cyapa->client->dev; input->open = cyapa_open; @@ -808,7 +808,7 @@ static int cyapa_create_input_dev(struct cyapa *cyapa) __set_bit(EV_ABS, input->evbit); - /* finger position */ + /* Finger position */ input_set_abs_params(input, ABS_MT_POSITION_X, 0, cyapa->max_abs_x, 0, 0); input_set_abs_params(input, ABS_MT_POSITION_Y, 0, cyapa->max_abs_y, 0, @@ -830,7 +830,7 @@ static int cyapa_create_input_dev(struct cyapa *cyapa) if (cyapa->btn_capability == CAPABILITY_LEFT_BTN_MASK) __set_bit(INPUT_PROP_BUTTONPAD, input->propbit); - /* handle pointer emulation and unused slots in core */ + /* Handle pointer emulation and unused slots in core */ error = input_mt_init_slots(input, CYAPA_MAX_MT_SLOTS, INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED); if (error) { @@ -894,7 +894,7 @@ static int cyapa_probe(struct i2c_client *client, IRQF_TRIGGER_FALLING | IRQF_ONESHOT, "cyapa", cyapa); if (error) { - dev_err(dev, "IRQ request failed: %d\n, ", error); + dev_err(dev, "failed to request threaded irq: %d\n", error); return error; }