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platform/x86: acer-wmi: Cleanup accelerometer device handling

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Cleanup accelerometer device handling:
-Drop acer_wmi_accel_destroy instead directly call input_unregister_device.
-The information tracked by the CAP_ACCEL flag mirrors acer_wmi_accel_dev
 being NULL. Drop the CAP flag, this is a preparation change for allowing
 users to override the capability flags. Dropping the flag stops users
 from causing a NULL pointer dereference by forcing the capability.

Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20201019185628.264473-3-hdegoede@redhat.com
This commit is contained in:
Hans de Goede 2020-10-19 20:56:25 +02:00
parent 7c936d8d26
commit 9feb0763e4
1 changed files with 6 additions and 14 deletions
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20
drivers/platform/x86/acer-wmi.c
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@ -210,7 +210,6 @@ struct hotkey_function_type_aa {
#define ACER_CAP_BLUETOOTH BIT(2)
#define ACER_CAP_BRIGHTNESS BIT(3)
#define ACER_CAP_THREEG BIT(4)
#define ACER_CAP_ACCEL BIT(5)
/*
* Interface type flags
@ -1509,7 +1508,7 @@ static int acer_gsensor_event(void)
struct acpi_buffer output;
union acpi_object out_obj[5];
if (!has_cap(ACER_CAP_ACCEL))
if (!acer_wmi_accel_dev)
return -1;
output.length = sizeof(out_obj);
@ -1883,8 +1882,6 @@ static int __init acer_wmi_accel_setup(void)
gsensor_handle = acpi_device_handle(adev);
acpi_dev_put(adev);
interface->capability |= ACER_CAP_ACCEL;
acer_wmi_accel_dev = input_allocate_device();
if (!acer_wmi_accel_dev)
return -ENOMEM;
@ -1910,11 +1907,6 @@ static int __init acer_wmi_accel_setup(void)
return err;
}
static void acer_wmi_accel_destroy(void)
{
input_unregister_device(acer_wmi_accel_dev);
}
static int __init acer_wmi_input_setup(void)
{
acpi_status status;
@ -2069,7 +2061,7 @@ static int acer_resume(struct device *dev)
if (has_cap(ACER_CAP_BRIGHTNESS))
set_u32(data->brightness, ACER_CAP_BRIGHTNESS);
if (has_cap(ACER_CAP_ACCEL))
if (acer_wmi_accel_dev)
acer_gsensor_init();
return 0;
@ -2259,8 +2251,8 @@ static int __init acer_wmi_init(void)
error_platform_register:
if (wmi_has_guid(ACERWMID_EVENT_GUID))
acer_wmi_input_destroy();
if (has_cap(ACER_CAP_ACCEL))
acer_wmi_accel_destroy();
if (acer_wmi_accel_dev)
input_unregister_device(acer_wmi_accel_dev);
return err;
}
@ -2270,8 +2262,8 @@ static void __exit acer_wmi_exit(void)
if (wmi_has_guid(ACERWMID_EVENT_GUID))
acer_wmi_input_destroy();
if (has_cap(ACER_CAP_ACCEL))
acer_wmi_accel_destroy();
if (acer_wmi_accel_dev)
input_unregister_device(acer_wmi_accel_dev);
remove_debugfs();
platform_device_unregister(acer_platform_device);