| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <52FD3A17.7040803@synaptics.com>
Date: Thu, 13 Feb 2014 13:33:11 -0800
From: Christopher Heiny <cheiny@...aptics.com>
To: Dmitry Torokhov <dmitry.torokhov@...il.com>
CC: Andrew Duggan <aduggan@...aptics.com>,
Vincent Huang <vincent.huang@...synaptics.com>,
Vivian Ly <vly@...aptics.com>,
Daniel Rosenberg <daniel.rosenberg@...aptics.com>,
Linus Walleij <linus.walleij@...ricsson.com>,
Benjamin Tissoires <benjamin.tissoires@...hat.com>,
Courtney Cavin <courtney.cavin@...ymobile.com>,
Linux Input <linux-input@...r.kernel.org>,
Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 08/11] Input: synaptics-rmi4 - use rmi_read/rmi_write
in F01
On 02/12/2014 09:27 PM, Dmitry Torokhov wrote:
> Use rmi_read()/rmi_write() for reading/writing single-byte data. Also print
> error code when IO fails.
>
> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
Acked-by: Christopher Heiny <cheiny@...aptics.com>
> ---
> drivers/input/rmi4/rmi_f01.c | 170 ++++++++++++++++++++++---------------------
> 1 file changed, 88 insertions(+), 82 deletions(-)
>
> diff --git a/drivers/input/rmi4/rmi_f01.c b/drivers/input/rmi4/rmi_f01.c
> index 1219e0c..a2f05bc 100644
> --- a/drivers/input/rmi4/rmi_f01.c
> +++ b/drivers/input/rmi4/rmi_f01.c
> @@ -171,8 +171,9 @@ static int rmi_f01_read_properties(struct rmi_device *rmi_dev,
>
> error = rmi_read_block(rmi_dev, query_base_addr,
> basic_query, sizeof(basic_query));
> - if (error < 0) {
> - dev_err(&rmi_dev->dev, "Failed to read device query registers.\n");
> + if (error) {
> + dev_err(&rmi_dev->dev,
> + "Failed to read device query registers: %d\n", error);
> return error;
> }
>
> @@ -205,25 +206,25 @@ static int rmi_f01_initialize(struct rmi_function *fn)
> {
> u8 temp;
> int error;
> - u16 ctrl_base_addr;
> struct rmi_device *rmi_dev = fn->rmi_dev;
> struct rmi_driver_data *driver_data = dev_get_drvdata(&rmi_dev->dev);
> struct f01_data *f01 = fn->data;
> - struct rmi_device_platform_data *pdata = to_rmi_platform_data(rmi_dev);
> + const struct rmi_device_platform_data *pdata = to_rmi_platform_data(rmi_dev);
> + u16 ctrl_base_addr = fn->fd.control_base_addr;
> u8 device_status;
>
> /*
> * Set the configured bit and (optionally) other important stuff
> * in the device control register.
> */
> - ctrl_base_addr = fn->fd.control_base_addr;
> - error = rmi_read_block(rmi_dev, fn->fd.control_base_addr,
> - &f01->device_control.ctrl0,
> - sizeof(f01->device_control.ctrl0));
> - if (error < 0) {
> - dev_err(&fn->dev, "Failed to read F01 control.\n");
> +
> + error = rmi_read(rmi_dev, fn->fd.control_base_addr,
> + &f01->device_control.ctrl0);
> + if (error) {
> + dev_err(&fn->dev, "Failed to read F01 control: %d\n", error);
> return error;
> }
> +
> switch (pdata->power_management.nosleep) {
> case RMI_F01_NOSLEEP_DEFAULT:
> break;
> @@ -249,11 +250,10 @@ static int rmi_f01_initialize(struct rmi_function *fn)
>
> f01->device_control.ctrl0 |= RMI_F01_CRTL0_CONFIGURED_BIT;
>
> - error = rmi_write_block(rmi_dev, fn->fd.control_base_addr,
> - &f01->device_control.ctrl0,
> - sizeof(f01->device_control.ctrl0));
> - if (error < 0) {
> - dev_err(&fn->dev, "Failed to write F01 control.\n");
> + error = rmi_write(rmi_dev, fn->fd.control_base_addr,
> + f01->device_control.ctrl0);
> + if (error) {
> + dev_err(&fn->dev, "Failed to write F01 control: %d\n", error);
> return error;
> }
>
> @@ -265,9 +265,10 @@ static int rmi_f01_initialize(struct rmi_function *fn)
> error = rmi_read_block(rmi_dev, ctrl_base_addr,
> f01->device_control.interrupt_enable,
> sizeof(u8) * (f01->num_of_irq_regs));
> - if (error < 0) {
> + if (error) {
> dev_err(&fn->dev,
> - "Failed to read F01 control interrupt enable register.\n");
> + "Failed to read F01 control interrupt enable register: %d\n",
> + error);
> return error;
> }
>
> @@ -302,8 +303,10 @@ static int rmi_f01_initialize(struct rmi_function *fn)
> } else {
> error = rmi_read(rmi_dev, f01->doze_interval_addr,
> &f01->device_control.doze_interval);
> - if (error < 0) {
> - dev_err(&fn->dev, "Failed to read F01 doze interval register.\n");
> + if (error) {
> + dev_err(&fn->dev,
> + "Failed to read F01 doze interval register: %d\n",
> + error);
> return error;
> }
> }
> @@ -318,7 +321,9 @@ static int rmi_f01_initialize(struct rmi_function *fn)
> error = rmi_read(rmi_dev, f01->wakeup_threshold_addr,
> &f01->device_control.wakeup_threshold);
> if (error < 0) {
> - dev_err(&fn->dev, "Failed to read F01 wakeup threshold register.\n");
> + dev_err(&fn->dev,
> + "Failed to read F01 wakeup threshold register: %d\n",
> + error);
> return error;
> }
> }
> @@ -337,17 +342,19 @@ static int rmi_f01_initialize(struct rmi_function *fn)
> } else {
> error = rmi_read(rmi_dev, f01->doze_holdoff_addr,
> &f01->device_control.doze_holdoff);
> - if (error < 0) {
> - dev_err(&fn->dev, "Failed to read F01 doze holdoff register.\n");
> + if (error) {
> + dev_err(&fn->dev,
> + "Failed to read F01 doze holdoff register: %d\n",
> + error);
> return error;
> }
> }
> }
>
> - error = rmi_read_block(rmi_dev, fn->fd.data_base_addr,
> - &device_status, sizeof(device_status));
> + error = rmi_read(rmi_dev, fn->fd.data_base_addr, &device_status);
> if (error < 0) {
> - dev_err(&fn->dev, "Failed to read device status.\n");
> + dev_err(&fn->dev,
> + "Failed to read device status: %d\n", error);
> return error;
> }
>
> @@ -364,50 +371,53 @@ static int rmi_f01_initialize(struct rmi_function *fn)
> static int rmi_f01_config(struct rmi_function *fn)
> {
> struct f01_data *f01 = fn->data;
> - int retval;
> -
> - retval = rmi_write_block(fn->rmi_dev, fn->fd.control_base_addr,
> - &f01->device_control.ctrl0,
> - sizeof(f01->device_control.ctrl0));
> - if (retval < 0) {
> - dev_err(&fn->dev, "Failed to write device_control.reg.\n");
> - return retval;
> + int error;
> +
> + error = rmi_write(fn->rmi_dev, fn->fd.control_base_addr,
> + f01->device_control.ctrl0);
> + if (error) {
> + dev_err(&fn->dev,
> + "Failed to write device_control register: %d\n", error);
> + return error;
> }
>
> - retval = rmi_write_block(fn->rmi_dev, f01->interrupt_enable_addr,
> - f01->device_control.interrupt_enable,
> - sizeof(u8) * f01->num_of_irq_regs);
> - if (retval < 0) {
> - dev_err(&fn->dev, "Failed to write interrupt enable.\n");
> - return retval;
> + error = rmi_write_block(fn->rmi_dev, f01->interrupt_enable_addr,
> + f01->device_control.interrupt_enable,
> + sizeof(u8) * f01->num_of_irq_regs);
> + if (error) {
> + dev_err(&fn->dev,
> + "Failed to write interrupt enable: %d\n", error);
> + return error;
> }
>
> if (f01->properties.has_adjustable_doze) {
> - retval = rmi_write_block(fn->rmi_dev, f01->doze_interval_addr,
> - &f01->device_control.doze_interval,
> - sizeof(u8));
> - if (retval < 0) {
> - dev_err(&fn->dev, "Failed to write doze interval.\n");
> - return retval;
> + error = rmi_write(fn->rmi_dev, f01->doze_interval_addr,
> + f01->device_control.doze_interval);
> + if (error) {
> + dev_err(&fn->dev,
> + "Failed to write doze interval: %d\n", error);
> + return error;
> }
>
> - retval = rmi_write_block(fn->rmi_dev,
> + error = rmi_write_block(fn->rmi_dev,
> f01->wakeup_threshold_addr,
> &f01->device_control.wakeup_threshold,
> sizeof(u8));
> - if (retval < 0) {
> - dev_err(&fn->dev, "Failed to write wakeup threshold.\n");
> - return retval;
> + if (error) {
> + dev_err(&fn->dev,
> + "Failed to write wakeup threshold: %d\n",
> + error);
> + return error;
> }
> }
>
> if (f01->properties.has_adjustable_doze_holdoff) {
> - retval = rmi_write_block(fn->rmi_dev, f01->doze_holdoff_addr,
> - &f01->device_control.doze_holdoff,
> - sizeof(u8));
> - if (retval < 0) {
> - dev_err(&fn->dev, "Failed to write doze holdoff.\n");
> - return retval;
> + error = rmi_write(fn->rmi_dev, f01->doze_holdoff_addr,
> + f01->device_control.doze_holdoff);
> + if (error) {
> + dev_err(&fn->dev,
> + "Failed to write doze holdoff: %d\n", error);
> + return error;
> }
> }
>
> @@ -439,23 +449,19 @@ static int rmi_f01_suspend(struct device *dev)
> struct f01_data *f01 = fn->data;
> int error;
>
> - f01->old_nosleep = f01->device_control.ctrl0 &
> - RMI_F01_CRTL0_NOSLEEP_BIT;
> + f01->old_nosleep =
> + f01->device_control.ctrl0 & RMI_F01_CRTL0_NOSLEEP_BIT;
> f01->device_control.ctrl0 &= ~RMI_F01_CRTL0_NOSLEEP_BIT;
>
> f01->device_control.ctrl0 &= ~RMI_F01_CTRL0_SLEEP_MODE_MASK;
> f01->device_control.ctrl0 |= RMI_SLEEP_MODE_SENSOR_SLEEP;
>
> - error = rmi_write_block(rmi_dev,
> - fn->fd.control_base_addr,
> - &f01->device_control.ctrl0,
> - sizeof(f01->device_control.ctrl0));
> - if (error < 0) {
> - dev_err(&fn->dev, "Failed to write sleep mode. Code: %d.\n",
> - error);
> + error = rmi_write(rmi_dev, fn->fd.control_base_addr,
> + f01->device_control.ctrl0);
> + if (error) {
> + dev_err(&fn->dev, "Failed to write sleep mode: %d.\n", error);
> if (f01->old_nosleep)
> - f01->device_control.ctrl0 |=
> - RMI_F01_CRTL0_NOSLEEP_BIT;
> + f01->device_control.ctrl0 |= RMI_F01_CRTL0_NOSLEEP_BIT;
> f01->device_control.ctrl0 &= ~RMI_F01_CTRL0_SLEEP_MODE_MASK;
> f01->device_control.ctrl0 |= RMI_SLEEP_MODE_NORMAL;
> return error;
> @@ -477,13 +483,11 @@ static int rmi_f01_resume(struct device *dev)
> f01->device_control.ctrl0 &= ~RMI_F01_CTRL0_SLEEP_MODE_MASK;
> f01->device_control.ctrl0 |= RMI_SLEEP_MODE_NORMAL;
>
> - error = rmi_write_block(rmi_dev, fn->fd.control_base_addr,
> - &f01->device_control.ctrl0,
> - sizeof(f01->device_control.ctrl0));
> - if (error < 0) {
> + error = rmi_write(rmi_dev, fn->fd.control_base_addr,
> + f01->device_control.ctrl0);
> + if (error) {
> dev_err(&fn->dev,
> - "Failed to restore normal operation. Code: %d.\n",
> - error);
> + "Failed to restore normal operation: %d.\n", error);
> return error;
> }
>
> @@ -497,23 +501,25 @@ static int rmi_f01_attention(struct rmi_function *fn,
> unsigned long *irq_bits)
> {
> struct rmi_device *rmi_dev = fn->rmi_dev;
> - int retval;
> + int error;
> u8 device_status;
>
> - retval = rmi_read_block(rmi_dev, fn->fd.data_base_addr,
> - &device_status, sizeof(device_status));
> - if (retval < 0) {
> - dev_err(&fn->dev, "Failed to read device status, code: %d.\n",
> - retval);
> - return retval;
> + error = rmi_read(rmi_dev, fn->fd.data_base_addr, &device_status);
> + if (error) {
> + dev_err(&fn->dev,
> + "Failed to read device status: %d.\n", error);
> + return error;
> }
>
> if (RMI_F01_STATUS_UNCONFIGURED(device_status)) {
> dev_warn(&fn->dev, "Device reset detected.\n");
> - retval = rmi_dev->driver->reset_handler(rmi_dev);
> - if (retval < 0)
> - return retval;
> + error = rmi_dev->driver->reset_handler(rmi_dev);
> + if (error) {
> + dev_err(&fn->dev, "Device reset failed: %d\n", error);
> + return error;
> + }
> }
> +
> return 0;
> }
>
>
--
Christopher Heiny
Senior Staff Firmware Engineer
Synaptics Incorporated
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists