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Subject[PATCH v2 8/8] platform/x86: fujitsu-laptop: use device-specific data in remaining module code
Date
To avoid using module-wide data in remaining module code, employ
acpi_driver_data() and dev_get_drvdata() to fetch device-specific data
to work on in each function. This makes the input local variables in
hotkey-related callbacks and the module-wide struct fujitsu_laptop
redundant, so remove them. Adjust whitespace to make checkpatch happy.

Signed-off-by: Michał Kępień <kernel@kempniu.pl>
---
drivers/platform/x86/fujitsu-laptop.c | 123 ++++++++++++++++++----------------
1 file changed, 64 insertions(+), 59 deletions(-)

diff --git a/drivers/platform/x86/fujitsu-laptop.c b/drivers/platform/x86/fujitsu-laptop.c
index 3d33be9f88f6..1c6fdd952c75 100644
--- a/drivers/platform/x86/fujitsu-laptop.c
+++ b/drivers/platform/x86/fujitsu-laptop.c
@@ -152,7 +152,6 @@ struct fujitsu_laptop {
int flags_state;
};

-static struct fujitsu_laptop *fujitsu_laptop;
static struct acpi_device *fext;

#ifdef CONFIG_FUJITSU_LAPTOP_DEBUG
@@ -290,9 +289,11 @@ static const struct backlight_ops fujitsu_bl_ops = {
static ssize_t lid_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
- if (!(fujitsu_laptop->flags_supported & FLAG_LID))
+ struct fujitsu_laptop *priv = dev_get_drvdata(dev);
+
+ if (!(priv->flags_supported & FLAG_LID))
return sprintf(buf, "unknown\n");
- if (fujitsu_laptop->flags_state & FLAG_LID)
+ if (priv->flags_state & FLAG_LID)
return sprintf(buf, "open\n");
else
return sprintf(buf, "closed\n");
@@ -301,9 +302,11 @@ static ssize_t lid_show(struct device *dev, struct device_attribute *attr,
static ssize_t dock_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
- if (!(fujitsu_laptop->flags_supported & FLAG_DOCK))
+ struct fujitsu_laptop *priv = dev_get_drvdata(dev);
+
+ if (!(priv->flags_supported & FLAG_DOCK))
return sprintf(buf, "unknown\n");
- if (fujitsu_laptop->flags_state & FLAG_DOCK)
+ if (priv->flags_state & FLAG_DOCK)
return sprintf(buf, "docked\n");
else
return sprintf(buf, "undocked\n");
@@ -312,9 +315,11 @@ static ssize_t dock_show(struct device *dev, struct device_attribute *attr,
static ssize_t radios_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
- if (!(fujitsu_laptop->flags_supported & FLAG_RFKILL))
+ struct fujitsu_laptop *priv = dev_get_drvdata(dev);
+
+ if (!(priv->flags_supported & FLAG_RFKILL))
return sprintf(buf, "unknown\n");
- if (fujitsu_laptop->flags_state & FLAG_RFKILL)
+ if (priv->flags_state & FLAG_RFKILL)
return sprintf(buf, "on\n");
else
return sprintf(buf, "killed\n");
@@ -571,19 +576,22 @@ static int acpi_fujitsu_laptop_input_setup(struct acpi_device *device)
return input_register_device(priv->input);
}

-static int fujitsu_laptop_platform_add(void)
+static int fujitsu_laptop_platform_add(struct acpi_device *device)
{
+ struct fujitsu_laptop *priv = acpi_driver_data(device);
int ret;

- fujitsu_laptop->pf_device = platform_device_alloc("fujitsu-laptop", -1);
- if (!fujitsu_laptop->pf_device)
+ priv->pf_device = platform_device_alloc("fujitsu-laptop", -1);
+ if (!priv->pf_device)
return -ENOMEM;

- ret = platform_device_add(fujitsu_laptop->pf_device);
+ platform_set_drvdata(priv->pf_device, priv);
+
+ ret = platform_device_add(priv->pf_device);
if (ret)
goto err_put_platform_device;

- ret = sysfs_create_group(&fujitsu_laptop->pf_device->dev.kobj,
+ ret = sysfs_create_group(&priv->pf_device->dev.kobj,
&fujitsu_pf_attribute_group);
if (ret)
goto err_del_platform_device;
@@ -591,18 +599,20 @@ static int fujitsu_laptop_platform_add(void)
return 0;

err_del_platform_device:
- platform_device_del(fujitsu_laptop->pf_device);
+ platform_device_del(priv->pf_device);
err_put_platform_device:
- platform_device_put(fujitsu_laptop->pf_device);
+ platform_device_put(priv->pf_device);

return ret;
}

-static void fujitsu_laptop_platform_remove(void)
+static void fujitsu_laptop_platform_remove(struct acpi_device *device)
{
- sysfs_remove_group(&fujitsu_laptop->pf_device->dev.kobj,
+ struct fujitsu_laptop *priv = acpi_driver_data(device);
+
+ sysfs_remove_group(&priv->pf_device->dev.kobj,
&fujitsu_pf_attribute_group);
- platform_device_unregister(fujitsu_laptop->pf_device);
+ platform_device_unregister(priv->pf_device);
}

static int logolamp_set(struct led_classdev *cdev,
@@ -798,16 +808,15 @@ static int acpi_fujitsu_laptop_add(struct acpi_device *device)
WARN_ONCE(fext, "More than one FUJ02E3 ACPI device was found. Driver may not work as intended.");
fext = device;

- fujitsu_laptop = priv;
sprintf(acpi_device_name(device), "%s",
ACPI_FUJITSU_LAPTOP_DEVICE_NAME);
sprintf(acpi_device_class(device), "%s", ACPI_FUJITSU_CLASS);
device->driver_data = priv;

/* kfifo */
- spin_lock_init(&fujitsu_laptop->fifo_lock);
- error = kfifo_alloc(&fujitsu_laptop->fifo, RINGBUFFERSIZE * sizeof(int),
- GFP_KERNEL);
+ spin_lock_init(&priv->fifo_lock);
+ error = kfifo_alloc(&priv->fifo, RINGBUFFERSIZE * sizeof(int),
+ GFP_KERNEL);
if (error) {
pr_err("kfifo_alloc failed\n");
goto err_stop;
@@ -836,25 +845,25 @@ static int acpi_fujitsu_laptop_add(struct acpi_device *device)
}

i = 0;
- while (call_fext_func(fext, FUNC_BUTTONS, 0x1, 0x0, 0x0) != 0
+ while (call_fext_func(device, FUNC_BUTTONS, 0x1, 0x0, 0x0) != 0
&& (i++) < MAX_HOTKEY_RINGBUFFER_SIZE)
; /* No action, result is discarded */
vdbg_printk(FUJLAPTOP_DBG_INFO, "Discarded %i ringbuffer entries\n", i);

- fujitsu_laptop->flags_supported =
- call_fext_func(fext, FUNC_FLAGS, 0x0, 0x0, 0x0);
+ priv->flags_supported = call_fext_func(device, FUNC_FLAGS, 0x0, 0x0,
+ 0x0);

/* Make sure our bitmask of supported functions is cleared if the
RFKILL function block is not implemented, like on the S7020. */
- if (fujitsu_laptop->flags_supported == UNSUPPORTED_CMD)
- fujitsu_laptop->flags_supported = 0;
+ if (priv->flags_supported == UNSUPPORTED_CMD)
+ priv->flags_supported = 0;

- if (fujitsu_laptop->flags_supported)
- fujitsu_laptop->flags_state =
- call_fext_func(fext, FUNC_FLAGS, 0x4, 0x0, 0x0);
+ if (priv->flags_supported)
+ priv->flags_state = call_fext_func(device, FUNC_FLAGS, 0x4, 0x0,
+ 0x0);

/* Suspect this is a keymap of the application panel, print it */
- pr_info("BTNI: [0x%x]\n", call_fext_func(fext,
+ pr_info("BTNI: [0x%x]\n", call_fext_func(device,
FUNC_BUTTONS, 0x0, 0x0, 0x0));

/* Sync backlight power status */
@@ -870,14 +879,14 @@ static int acpi_fujitsu_laptop_add(struct acpi_device *device)
if (error)
goto err_free_fifo;

- error = fujitsu_laptop_platform_add();
+ error = fujitsu_laptop_platform_add(device);
if (error)
goto err_free_fifo;

return 0;

err_free_fifo:
- kfifo_free(&fujitsu_laptop->fifo);
+ kfifo_free(&priv->fifo);
err_stop:
return error;
}
@@ -886,44 +895,42 @@ static int acpi_fujitsu_laptop_remove(struct acpi_device *device)
{
struct fujitsu_laptop *priv = acpi_driver_data(device);

- fujitsu_laptop_platform_remove();
+ fujitsu_laptop_platform_remove(device);

kfifo_free(&priv->fifo);

return 0;
}

-static void acpi_fujitsu_laptop_press(int scancode)
+static void acpi_fujitsu_laptop_press(struct acpi_device *device, int scancode)
{
- struct input_dev *input = fujitsu_laptop->input;
+ struct fujitsu_laptop *priv = acpi_driver_data(device);
int status;

- status = kfifo_in_locked(&fujitsu_laptop->fifo,
- (unsigned char *)&scancode, sizeof(scancode),
- &fujitsu_laptop->fifo_lock);
+ status = kfifo_in_locked(&priv->fifo, (unsigned char *)&scancode,
+ sizeof(scancode), &priv->fifo_lock);
if (status != sizeof(scancode)) {
vdbg_printk(FUJLAPTOP_DBG_WARN,
"Could not push scancode [0x%x]\n", scancode);
return;
}
- sparse_keymap_report_event(input, scancode, 1, false);
+ sparse_keymap_report_event(priv->input, scancode, 1, false);
vdbg_printk(FUJLAPTOP_DBG_TRACE,
"Push scancode into ringbuffer [0x%x]\n", scancode);
}

-static void acpi_fujitsu_laptop_release(void)
+static void acpi_fujitsu_laptop_release(struct acpi_device *device)
{
- struct input_dev *input = fujitsu_laptop->input;
+ struct fujitsu_laptop *priv = acpi_driver_data(device);
int scancode, status;

while (true) {
- status = kfifo_out_locked(&fujitsu_laptop->fifo,
+ status = kfifo_out_locked(&priv->fifo,
(unsigned char *)&scancode,
- sizeof(scancode),
- &fujitsu_laptop->fifo_lock);
+ sizeof(scancode), &priv->fifo_lock);
if (status != sizeof(scancode))
return;
- sparse_keymap_report_event(input, scancode, 0, false);
+ sparse_keymap_report_event(priv->input, scancode, 0, false);
vdbg_printk(FUJLAPTOP_DBG_TRACE,
"Pop scancode from ringbuffer [0x%x]\n", scancode);
}
@@ -931,31 +938,29 @@ static void acpi_fujitsu_laptop_release(void)

static void acpi_fujitsu_laptop_notify(struct acpi_device *device, u32 event)
{
- struct input_dev *input;
+ struct fujitsu_laptop *priv = acpi_driver_data(device);
int scancode, i = 0;
unsigned int irb;

- input = fujitsu_laptop->input;
-
if (event != ACPI_FUJITSU_NOTIFY_CODE1) {
vdbg_printk(FUJLAPTOP_DBG_WARN,
"Unsupported event [0x%x]\n", event);
- sparse_keymap_report_event(input, -1, 1, true);
+ sparse_keymap_report_event(priv->input, -1, 1, true);
return;
}

- if (fujitsu_laptop->flags_supported)
- fujitsu_laptop->flags_state =
- call_fext_func(fext, FUNC_FLAGS, 0x4, 0x0, 0x0);
+ if (priv->flags_supported)
+ priv->flags_state = call_fext_func(device, FUNC_FLAGS, 0x4, 0x0,
+ 0x0);

- while ((irb = call_fext_func(fext,
+ while ((irb = call_fext_func(device,
FUNC_BUTTONS, 0x1, 0x0, 0x0)) != 0 &&
i++ < MAX_HOTKEY_RINGBUFFER_SIZE) {
scancode = irb & 0x4ff;
- if (sparse_keymap_entry_from_scancode(input, scancode))
- acpi_fujitsu_laptop_press(scancode);
+ if (sparse_keymap_entry_from_scancode(priv->input, scancode))
+ acpi_fujitsu_laptop_press(device, scancode);
else if (scancode == 0)
- acpi_fujitsu_laptop_release();
+ acpi_fujitsu_laptop_release(device);
else
vdbg_printk(FUJLAPTOP_DBG_WARN,
"Unknown GIRB result [%x]\n", irb);
@@ -965,9 +970,9 @@ static void acpi_fujitsu_laptop_notify(struct acpi_device *device, u32 event)
* E736/E746/E756), the touchpad toggle hotkey (Fn+F4) is
* handled in software; its state is queried using FUNC_FLAGS
*/
- if ((fujitsu_laptop->flags_supported & BIT(26)) &&
- (call_fext_func(fext, FUNC_FLAGS, 0x1, 0x0, 0x0) & BIT(26)))
- sparse_keymap_report_event(input, BIT(26), 1, true);
+ if ((priv->flags_supported & BIT(26)) &&
+ (call_fext_func(device, FUNC_FLAGS, 0x1, 0x0, 0x0) & BIT(26)))
+ sparse_keymap_report_event(priv->input, BIT(26), 1, true);
}

/* Initialization */
--
2.13.0
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