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alistair23-linux/drivers/leds/leds-apu.c
Kees Cook a86854d0c5 treewide: devm_kzalloc() -> devm_kcalloc() 
The devm_kzalloc() function has a 2-factor argument form, devm_kcalloc().
This patch replaces cases of:

        devm_kzalloc(handle, a * b, gfp)

with:
        devm_kcalloc(handle, a * b, gfp)

as well as handling cases of:

        devm_kzalloc(handle, a * b * c, gfp)

with:

        devm_kzalloc(handle, array3_size(a, b, c), gfp)

as it's slightly less ugly than:

        devm_kcalloc(handle, array_size(a, b), c, gfp)

This does, however, attempt to ignore constant size factors like:

        devm_kzalloc(handle, 4 * 1024, gfp)

though any constants defined via macros get caught up in the conversion.

Any factors with a sizeof() of "unsigned char", "char", and "u8" were
dropped, since they're redundant.

Some manual whitespace fixes were needed in this patch, as Coccinelle
really liked to write "=devm_kcalloc..." instead of "= devm_kcalloc...".

The Coccinelle script used for this was:

// Fix redundant parens around sizeof().
@@
expression HANDLE;
type TYPE;
expression THING, E;
@@

(
  devm_kzalloc(HANDLE,
-	(sizeof(TYPE)) * E
+	sizeof(TYPE) * E
  , ...)
|
  devm_kzalloc(HANDLE,
-	(sizeof(THING)) * E
+	sizeof(THING) * E
  , ...)
)

// Drop single-byte sizes and redundant parens.
@@
expression HANDLE;
expression COUNT;
typedef u8;
typedef __u8;
@@

(
  devm_kzalloc(HANDLE,
-	sizeof(u8) * (COUNT)
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(__u8) * (COUNT)
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(char) * (COUNT)
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(unsigned char) * (COUNT)
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(u8) * COUNT
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(__u8) * COUNT
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(char) * COUNT
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(unsigned char) * COUNT
+	COUNT
  , ...)
)

// 2-factor product with sizeof(type/expression) and identifier or constant.
@@
expression HANDLE;
type TYPE;
expression THING;
identifier COUNT_ID;
constant COUNT_CONST;
@@

(
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(TYPE) * (COUNT_ID)
+	COUNT_ID, sizeof(TYPE)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(TYPE) * COUNT_ID
+	COUNT_ID, sizeof(TYPE)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(TYPE) * (COUNT_CONST)
+	COUNT_CONST, sizeof(TYPE)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(TYPE) * COUNT_CONST
+	COUNT_CONST, sizeof(TYPE)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(THING) * (COUNT_ID)
+	COUNT_ID, sizeof(THING)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(THING) * COUNT_ID
+	COUNT_ID, sizeof(THING)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(THING) * (COUNT_CONST)
+	COUNT_CONST, sizeof(THING)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(THING) * COUNT_CONST
+	COUNT_CONST, sizeof(THING)
  , ...)
)

// 2-factor product, only identifiers.
@@
expression HANDLE;
identifier SIZE, COUNT;
@@

- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	SIZE * COUNT
+	COUNT, SIZE
  , ...)

// 3-factor product with 1 sizeof(type) or sizeof(expression), with
// redundant parens removed.
@@
expression HANDLE;
expression THING;
identifier STRIDE, COUNT;
type TYPE;
@@

(
  devm_kzalloc(HANDLE,
-	sizeof(TYPE) * (COUNT) * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(TYPE) * (COUNT) * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(TYPE) * COUNT * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(TYPE) * COUNT * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(THING) * (COUNT) * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(THING) * (COUNT) * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(THING) * COUNT * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(THING) * COUNT * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
)

// 3-factor product with 2 sizeof(variable), with redundant parens removed.
@@
expression HANDLE;
expression THING1, THING2;
identifier COUNT;
type TYPE1, TYPE2;
@@

(
  devm_kzalloc(HANDLE,
-	sizeof(TYPE1) * sizeof(TYPE2) * COUNT
+	array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(THING1) * sizeof(THING2) * COUNT
+	array3_size(COUNT, sizeof(THING1), sizeof(THING2))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(THING1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(THING1), sizeof(THING2))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(TYPE1) * sizeof(THING2) * COUNT
+	array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
  , ...)
)

// 3-factor product, only identifiers, with redundant parens removed.
@@
expression HANDLE;
identifier STRIDE, SIZE, COUNT;
@@

(
  devm_kzalloc(HANDLE,
-	(COUNT) * STRIDE * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	COUNT * (STRIDE) * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	COUNT * STRIDE * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	(COUNT) * (STRIDE) * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	COUNT * (STRIDE) * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	(COUNT) * STRIDE * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	(COUNT) * (STRIDE) * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	COUNT * STRIDE * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
)

// Any remaining multi-factor products, first at least 3-factor products,
// when they're not all constants...
@@
expression HANDLE;
expression E1, E2, E3;
constant C1, C2, C3;
@@

(
  devm_kzalloc(HANDLE, C1 * C2 * C3, ...)
|
  devm_kzalloc(HANDLE,
-	(E1) * E2 * E3
+	array3_size(E1, E2, E3)
  , ...)
|
  devm_kzalloc(HANDLE,
-	(E1) * (E2) * E3
+	array3_size(E1, E2, E3)
  , ...)
|
  devm_kzalloc(HANDLE,
-	(E1) * (E2) * (E3)
+	array3_size(E1, E2, E3)
  , ...)
|
  devm_kzalloc(HANDLE,
-	E1 * E2 * E3
+	array3_size(E1, E2, E3)
  , ...)
)

// And then all remaining 2 factors products when they're not all constants,
// keeping sizeof() as the second factor argument.
@@
expression HANDLE;
expression THING, E1, E2;
type TYPE;
constant C1, C2, C3;
@@

(
  devm_kzalloc(HANDLE, sizeof(THING) * C2, ...)
|
  devm_kzalloc(HANDLE, sizeof(TYPE) * C2, ...)
|
  devm_kzalloc(HANDLE, C1 * C2 * C3, ...)
|
  devm_kzalloc(HANDLE, C1 * C2, ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(TYPE) * (E2)
+	E2, sizeof(TYPE)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(TYPE) * E2
+	E2, sizeof(TYPE)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(THING) * (E2)
+	E2, sizeof(THING)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(THING) * E2
+	E2, sizeof(THING)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	(E1) * E2
+	E1, E2
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	(E1) * (E2)
+	E1, E2
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	E1 * E2
+	E1, E2
  , ...)
)

Signed-off-by: Kees Cook <keescook@chromium.org>
2018-06-12 16:19:22 -07:00

301 lines
8.4 KiB
C
Raw Blame History

/*
* drivers/leds/leds-apu.c
* Copyright (C) 2017 Alan Mizrahi, alan at mizrahi dot com dot ve
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the names of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <linux/dmi.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#define APU1_FCH_ACPI_MMIO_BASE 0xFED80000
#define APU1_FCH_GPIO_BASE (APU1_FCH_ACPI_MMIO_BASE + 0x01BD)
#define APU1_LEDON 0x08
#define APU1_LEDOFF 0xC8
#define APU1_NUM_GPIO 3
#define APU1_IOSIZE sizeof(u8)
#define APU2_FCH_ACPI_MMIO_BASE 0xFED80000
#define APU2_FCH_GPIO_BASE (APU2_FCH_ACPI_MMIO_BASE + 0x1500)
#define APU2_GPIO_BIT_WRITE 22
#define APU2_APU2_NUM_GPIO 4
#define APU2_IOSIZE sizeof(u32)
/* LED access parameters */
struct apu_param {
void __iomem *addr; /* for ioread/iowrite */
};
/* LED private data */
struct apu_led_priv {
struct led_classdev cdev;
struct apu_param param;
};
#define cdev_to_priv(c) container_of(c, struct apu_led_priv, cdev)
/* LED profile */
struct apu_led_profile {
const char *name;
enum led_brightness brightness;
unsigned long offset; /* for devm_ioremap */
};
/* Supported platform types */
enum apu_led_platform_types {
APU1_LED_PLATFORM,
APU2_LED_PLATFORM,
};
struct apu_led_pdata {
struct platform_device *pdev;
struct apu_led_priv *pled;
const struct apu_led_profile *profile;
enum apu_led_platform_types platform;
int num_led_instances;
int iosize; /* for devm_ioremap() */
spinlock_t lock;
};
static struct apu_led_pdata *apu_led;
static const struct apu_led_profile apu1_led_profile[] = {
{ "apu:green:1", LED_ON, APU1_FCH_GPIO_BASE + 0 * APU1_IOSIZE },
{ "apu:green:2", LED_OFF, APU1_FCH_GPIO_BASE + 1 * APU1_IOSIZE },
{ "apu:green:3", LED_OFF, APU1_FCH_GPIO_BASE + 2 * APU1_IOSIZE },
};
static const struct apu_led_profile apu2_led_profile[] = {
{ "apu2:green:1", LED_ON, APU2_FCH_GPIO_BASE + 68 * APU2_IOSIZE },
{ "apu2:green:2", LED_OFF, APU2_FCH_GPIO_BASE + 69 * APU2_IOSIZE },
{ "apu2:green:3", LED_OFF, APU2_FCH_GPIO_BASE + 70 * APU2_IOSIZE },
};
static const struct dmi_system_id apu_led_dmi_table[] __initconst = {
{
.ident = "apu",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "PC Engines"),
DMI_MATCH(DMI_PRODUCT_NAME, "APU")
}
},
/* PC Engines APU2 with "Legacy" bios < 4.0.8 */
{
.ident = "apu2",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "PC Engines"),
DMI_MATCH(DMI_BOARD_NAME, "APU2")
}
},
/* PC Engines APU2 with "Legacy" bios >= 4.0.8 */
{
.ident = "apu2",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "PC Engines"),
DMI_MATCH(DMI_BOARD_NAME, "apu2")
}
},
/* PC Engines APU2 with "Mainline" bios */
{
.ident = "apu2",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "PC Engines"),
DMI_MATCH(DMI_BOARD_NAME, "PC Engines apu2")
}
},
{}
};
MODULE_DEVICE_TABLE(dmi, apu_led_dmi_table);
static void apu1_led_brightness_set(struct led_classdev *led, enum led_brightness value)
{
struct apu_led_priv *pled = cdev_to_priv(led);
spin_lock(&apu_led->lock);
iowrite8(value ? APU1_LEDON : APU1_LEDOFF, pled->param.addr);
spin_unlock(&apu_led->lock);
}
static void apu2_led_brightness_set(struct led_classdev *led, enum led_brightness value)
{
struct apu_led_priv *pled = cdev_to_priv(led);
u32 value_new;
spin_lock(&apu_led->lock);
value_new = ioread32(pled->param.addr);
if (value)
value_new &= ~BIT(APU2_GPIO_BIT_WRITE);
else
value_new |= BIT(APU2_GPIO_BIT_WRITE);
iowrite32(value_new, pled->param.addr);
spin_unlock(&apu_led->lock);
}
static int apu_led_config(struct device *dev, struct apu_led_pdata *apuld)
{
int i;
int err;
apu_led->pled = devm_kcalloc(dev,
apu_led->num_led_instances, sizeof(struct apu_led_priv),
GFP_KERNEL);
if (!apu_led->pled)
return -ENOMEM;
for (i = 0; i < apu_led->num_led_instances; i++) {
struct apu_led_priv *pled = &apu_led->pled[i];
struct led_classdev *led_cdev = &pled->cdev;
led_cdev->name = apu_led->profile[i].name;
led_cdev->brightness = apu_led->profile[i].brightness;
led_cdev->max_brightness = 1;
led_cdev->flags = LED_CORE_SUSPENDRESUME;
if (apu_led->platform == APU1_LED_PLATFORM)
led_cdev->brightness_set = apu1_led_brightness_set;
else if (apu_led->platform == APU2_LED_PLATFORM)
led_cdev->brightness_set = apu2_led_brightness_set;
pled->param.addr = devm_ioremap(dev,
apu_led->profile[i].offset, apu_led->iosize);
if (!pled->param.addr) {
err = -ENOMEM;
goto error;
}
err = led_classdev_register(dev, led_cdev);
if (err)
goto error;
led_cdev->brightness_set(led_cdev, apu_led->profile[i].brightness);
}
return 0;
error:
while (i-- > 0)
led_classdev_unregister(&apu_led->pled[i].cdev);
return err;
}
static int __init apu_led_probe(struct platform_device *pdev)
{
apu_led = devm_kzalloc(&pdev->dev, sizeof(*apu_led), GFP_KERNEL);
if (!apu_led)
return -ENOMEM;
apu_led->pdev = pdev;
if (dmi_match(DMI_PRODUCT_NAME, "APU")) {
apu_led->profile = apu1_led_profile;
apu_led->platform = APU1_LED_PLATFORM;
apu_led->num_led_instances = ARRAY_SIZE(apu1_led_profile);
apu_led->iosize = APU1_IOSIZE;
} else if (dmi_match(DMI_BOARD_NAME, "APU2") ||
dmi_match(DMI_BOARD_NAME, "apu2") ||
dmi_match(DMI_BOARD_NAME, "PC Engines apu2")) {
apu_led->profile = apu2_led_profile;
apu_led->platform = APU2_LED_PLATFORM;
apu_led->num_led_instances = ARRAY_SIZE(apu2_led_profile);
apu_led->iosize = APU2_IOSIZE;
}
spin_lock_init(&apu_led->lock);
return apu_led_config(&pdev->dev, apu_led);
}
static struct platform_driver apu_led_driver = {
.driver = {
.name = KBUILD_MODNAME,
},
};
static int __init apu_led_init(void)
{
struct platform_device *pdev;
int err;
if (!dmi_match(DMI_SYS_VENDOR, "PC Engines")) {
pr_err("No PC Engines board detected\n");
return -ENODEV;
}
if (!(dmi_match(DMI_PRODUCT_NAME, "APU") ||
dmi_match(DMI_PRODUCT_NAME, "APU2") ||
dmi_match(DMI_PRODUCT_NAME, "apu2") ||
dmi_match(DMI_PRODUCT_NAME, "PC Engines apu2"))) {
pr_err("Unknown PC Engines board: %s\n",
dmi_get_system_info(DMI_PRODUCT_NAME));
return -ENODEV;
}
pdev = platform_device_register_simple(KBUILD_MODNAME, -1, NULL, 0);
if (IS_ERR(pdev)) {
pr_err("Device allocation failed\n");
return PTR_ERR(pdev);
}
err = platform_driver_probe(&apu_led_driver, apu_led_probe);
if (err) {
pr_err("Probe platform driver failed\n");
platform_device_unregister(pdev);
}
return err;
}
static void __exit apu_led_exit(void)
{
int i;
for (i = 0; i < apu_led->num_led_instances; i++)
led_classdev_unregister(&apu_led->pled[i].cdev);
platform_device_unregister(apu_led->pdev);
platform_driver_unregister(&apu_led_driver);
}
module_init(apu_led_init);
module_exit(apu_led_exit);
MODULE_AUTHOR("Alan Mizrahi");
MODULE_DESCRIPTION("PC Engines APU family LED driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:leds_apu");
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