[PATCH 1/1] platform: x86: Deletion of checks before backlight_device_unregister()

SF Markus Elfring
2014-11-24T19:40:22Z

From: Markus Elfring <elfring@users.sourceforge.net>
Date: Mon, 24 Nov 2014 20:30:29 +0100

The backlight_device_unregister() function tests whether its argument is NULL
and then returns immediately. Thus the test around the call is not needed.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
---
drivers/platform/x86/asus-laptop.c | 3 +--
drivers/platform/x86/asus-wmi.c | 3 +--
drivers/platform/x86/eeepc-laptop.c | 3 +--
drivers/platform/x86/fujitsu-laptop.c | 6 ++----
drivers/platform/x86/ideapad-laptop.c | 3 +--
drivers/platform/x86/intel_oaktrail.c | 3 +--
drivers/platform/x86/msi-wmi.c | 3 +--
drivers/platform/x86/sony-laptop.c | 3 +--
drivers/platform/x86/toshiba_acpi.c | 3 +--
9 files changed, 10 insertions(+), 20 deletions(-)

diff --git a/drivers/platform/x86/asus-laptop.c b/drivers/platform/x86/asus-laptop.c
index 7f4dc6f..11fac1a 100644
--- a/drivers/platform/x86/asus-laptop.c
+++ b/drivers/platform/x86/asus-laptop.c
@@ -843,8 +843,7 @@ static int asus_backlight_init(struct asus_laptop *asus)

static void asus_backlight_exit(struct asus_laptop *asus)
{
- if (asus->backlight_device)
- backlight_device_unregister(asus->backlight_device);
+ backlight_device_unregister(asus->backlight_device);
asus->backlight_device = NULL;
}

diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index 21fc932..7543a56 100644
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -1308,8 +1308,7 @@ static int asus_wmi_backlight_init(struct asus_wmi *asus)

static void asus_wmi_backlight_exit(struct asus_wmi *asus)
{
- if (asus->backlight_device)
- backlight_device_unregister(asus->backlight_device);
+ backlight_device_unregister(asus->backlight_device);

asus->backlight_device = NULL;
}
diff --git a/drivers/platform/x86/eeepc-laptop.c b/drivers/platform/x86/eeepc-laptop.c
index bd533c2..9bc7eb7 100644
--- a/drivers/platform/x86/eeepc-laptop.c
+++ b/drivers/platform/x86/eeepc-laptop.c
@@ -1158,8 +1158,7 @@ static int eeepc_backlight_init(struct eeepc_laptop *eeepc)

static void eeepc_backlight_exit(struct eeepc_laptop *eeepc)
{
- if (eeepc->backlight_device)
- backlight_device_unregister(eeepc->backlight_device);
+ backlight_device_unregister(eeepc->backlight_device);
eeepc->backlight_device = NULL;
}

diff --git a/drivers/platform/x86/fujitsu-laptop.c b/drivers/platform/x86/fujitsu-laptop.c
index 87aa28c..f1a670b 100644
--- a/drivers/platform/x86/fujitsu-laptop.c
+++ b/drivers/platform/x86/fujitsu-laptop.c
@@ -1147,8 +1147,7 @@ fail_hotkey1:
fail_hotkey:
platform_driver_unregister(&fujitsupf_driver);
fail_backlight:
- if (fujitsu->bl_device)
- backlight_device_unregister(fujitsu->bl_device);
+ backlight_device_unregister(fujitsu->bl_device);
fail_sysfs_group:
sysfs_remove_group(&fujitsu->pf_device->dev.kobj,
&fujitsupf_attribute_group);
@@ -1172,8 +1171,7 @@ static void __exit fujitsu_cleanup(void)

platform_driver_unregister(&fujitsupf_driver);

- if (fujitsu->bl_device)
- backlight_device_unregister(fujitsu->bl_device);
+ backlight_device_unregister(fujitsu->bl_device);

sysfs_remove_group(&fujitsu->pf_device->dev.kobj,
&fujitsupf_attribute_group);
diff --git a/drivers/platform/x86/ideapad-laptop.c b/drivers/platform/x86/ideapad-laptop.c
index ed494f3..3163061 100644
--- a/drivers/platform/x86/ideapad-laptop.c
+++ b/drivers/platform/x86/ideapad-laptop.c
@@ -729,8 +729,7 @@ static int ideapad_backlight_init(struct ideapad_private *priv)

static void ideapad_backlight_exit(struct ideapad_private *priv)
{
- if (priv->blightdev)
- backlight_device_unregister(priv->blightdev);
+ backlight_device_unregister(priv->blightdev);
priv->blightdev = NULL;
}

diff --git a/drivers/platform/x86/intel_oaktrail.c b/drivers/platform/x86/intel_oaktrail.c
index 4bc9604..0dd72cf 100644
--- a/drivers/platform/x86/intel_oaktrail.c
+++ b/drivers/platform/x86/intel_oaktrail.c
@@ -271,8 +271,7 @@ static int oaktrail_backlight_init(void)

static void oaktrail_backlight_exit(void)
{
- if (oaktrail_bl_device)
- backlight_device_unregister(oaktrail_bl_device);
+ backlight_device_unregister(oaktrail_bl_device);
}

static int oaktrail_probe(struct platform_device *pdev)
diff --git a/drivers/platform/x86/msi-wmi.c b/drivers/platform/x86/msi-wmi.c
index 70222f2..6d2bac0 100644
--- a/drivers/platform/x86/msi-wmi.c
+++ b/drivers/platform/x86/msi-wmi.c
@@ -354,8 +354,7 @@ static void __exit msi_wmi_exit(void)
sparse_keymap_free(msi_wmi_input_dev);
input_unregister_device(msi_wmi_input_dev);
}
- if (backlight)
- backlight_device_unregister(backlight);
+ backlight_device_unregister(backlight);
}

module_init(msi_wmi_init);
diff --git a/drivers/platform/x86/sony-laptop.c b/drivers/platform/x86/sony-laptop.c
index 26ad9ff..a48cdc7 100644
--- a/drivers/platform/x86/sony-laptop.c
+++ b/drivers/platform/x86/sony-laptop.c
@@ -3141,8 +3141,7 @@ static void sony_nc_backlight_setup(void)

static void sony_nc_backlight_cleanup(void)
{
- if (sony_bl_props.dev)
- backlight_device_unregister(sony_bl_props.dev);
+ backlight_device_unregister(sony_bl_props.dev);
}

static int sony_nc_add(struct acpi_device *device)
diff --git a/drivers/platform/x86/toshiba_acpi.c b/drivers/platform/x86/toshiba_acpi.c
index d0dce73..703a68a 100644
--- a/drivers/platform/x86/toshiba_acpi.c
+++ b/drivers/platform/x86/toshiba_acpi.c
@@ -1647,8 +1647,7 @@ static int toshiba_acpi_remove(struct acpi_device *acpi_dev)
rfkill_destroy(dev->bt_rfk);
}

- if (dev->backlight_dev)
- backlight_device_unregister(dev->backlight_dev);
+ backlight_device_unregister(dev->backlight_dev);

if (dev->illumination_supported)
led_classdev_unregister(&dev->led_dev);
--
2.1.3