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path: root/drivers/platform/x86/acer-wmi.c
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Diffstat (limited to 'drivers/platform/x86/acer-wmi.c')
-rw-r--r--drivers/platform/x86/acer-wmi.c79
1 files changed, 48 insertions, 31 deletions
diff --git a/drivers/platform/x86/acer-wmi.c b/drivers/platform/x86/acer-wmi.c
index 1ea6c434d330..2badee2fdeed 100644
--- a/drivers/platform/x86/acer-wmi.c
+++ b/drivers/platform/x86/acer-wmi.c
@@ -50,17 +50,6 @@ MODULE_LICENSE("GPL");
#define ACER_INFO KERN_INFO ACER_LOGPREFIX
/*
- * The following defines quirks to get some specific functions to work
- * which are known to not be supported over ACPI-WMI (such as the mail LED
- * on WMID based Acer's)
- */
-struct acer_quirks {
- const char *vendor;
- const char *model;
- u16 quirks;
-};
-
-/*
* Magic Number
* Meaning is unknown - this number is required for writing to ACPI for AMW0
* (it's also used in acerhk when directly accessing the BIOS)
@@ -200,7 +189,7 @@ static void set_quirks(void)
static int dmi_matched(const struct dmi_system_id *dmi)
{
quirks = dmi->driver_data;
- return 0;
+ return 1;
}
static struct quirk_entry quirk_unknown = {
@@ -555,6 +544,7 @@ static acpi_status AMW0_find_mailled(void)
obj->buffer.length == sizeof(struct wmab_ret)) {
ret = *((struct wmab_ret *) obj->buffer.pointer);
} else {
+ kfree(out.pointer);
return AE_ERROR;
}
@@ -570,7 +560,7 @@ static acpi_status AMW0_set_capabilities(void)
{
struct wmab_args args;
struct wmab_ret ret;
- acpi_status status = AE_OK;
+ acpi_status status;
struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *obj;
@@ -593,12 +583,13 @@ static acpi_status AMW0_set_capabilities(void)
if (ACPI_FAILURE(status))
return status;
- obj = (union acpi_object *) out.pointer;
+ obj = out.pointer;
if (obj && obj->type == ACPI_TYPE_BUFFER &&
obj->buffer.length == sizeof(struct wmab_ret)) {
ret = *((struct wmab_ret *) obj->buffer.pointer);
} else {
- return AE_ERROR;
+ status = AE_ERROR;
+ goto out;
}
if (ret.eax & 0x1)
@@ -607,23 +598,26 @@ static acpi_status AMW0_set_capabilities(void)
args.ebx = 2 << 8;
args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
+ /*
+ * It's ok to use existing buffer for next wmab_execute call.
+ * But we need to kfree(out.pointer) if next wmab_execute fail.
+ */
status = wmab_execute(&args, &out);
if (ACPI_FAILURE(status))
- return status;
+ goto out;
obj = (union acpi_object *) out.pointer;
if (obj && obj->type == ACPI_TYPE_BUFFER
&& obj->buffer.length == sizeof(struct wmab_ret)) {
ret = *((struct wmab_ret *) obj->buffer.pointer);
} else {
- return AE_ERROR;
+ status = AE_ERROR;
+ goto out;
}
if (ret.eax & 0x1)
interface->capability |= ACER_CAP_BLUETOOTH;
- kfree(out.pointer);
-
/*
* This appears to be safe to enable, since all Wistron based laptops
* appear to use the same EC register for brightness, even if they
@@ -632,7 +626,10 @@ static acpi_status AMW0_set_capabilities(void)
if (quirks->brightness >= 0)
interface->capability |= ACER_CAP_BRIGHTNESS;
- return AE_OK;
+ status = AE_OK;
+out:
+ kfree(out.pointer);
+ return status;
}
static struct wmi_interface AMW0_interface = {
@@ -772,6 +769,7 @@ static acpi_status WMID_set_capabilities(void)
obj->buffer.length == sizeof(u32)) {
devices = *((u32 *) obj->buffer.pointer);
} else {
+ kfree(out.pointer);
return AE_ERROR;
}
@@ -788,6 +786,7 @@ static acpi_status WMID_set_capabilities(void)
if (!(devices & 0x20))
max_brightness = 0x9;
+ kfree(out.pointer);
return status;
}
@@ -1084,8 +1083,7 @@ static ssize_t show_interface(struct device *dev, struct device_attribute *attr,
}
}
-static DEVICE_ATTR(interface, S_IWUGO | S_IRUGO | S_IWUSR,
- show_interface, NULL);
+static DEVICE_ATTR(interface, S_IRUGO, show_interface, NULL);
/*
* debugfs functions
@@ -1095,6 +1093,7 @@ static u32 get_wmid_devices(void)
struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
union acpi_object *obj;
acpi_status status;
+ u32 devices = 0;
status = wmi_query_block(WMID_GUID2, 1, &out);
if (ACPI_FAILURE(status))
@@ -1103,10 +1102,11 @@ static u32 get_wmid_devices(void)
obj = (union acpi_object *) out.pointer;
if (obj && obj->type == ACPI_TYPE_BUFFER &&
obj->buffer.length == sizeof(u32)) {
- return *((u32 *) obj->buffer.pointer);
- } else {
- return 0;
+ devices = *((u32 *) obj->buffer.pointer);
}
+
+ kfree(out.pointer);
+ return devices;
}
/*
@@ -1327,22 +1327,31 @@ static int __init acer_wmi_init(void)
"generic video driver\n");
}
- if (platform_driver_register(&acer_platform_driver)) {
+ err = platform_driver_register(&acer_platform_driver);
+ if (err) {
printk(ACER_ERR "Unable to register platform driver.\n");
goto error_platform_register;
}
+
acer_platform_device = platform_device_alloc("acer-wmi", -1);
- platform_device_add(acer_platform_device);
+ if (!acer_platform_device) {
+ err = -ENOMEM;
+ goto error_device_alloc;
+ }
+
+ err = platform_device_add(acer_platform_device);
+ if (err)
+ goto error_device_add;
err = create_sysfs();
if (err)
- return err;
+ goto error_create_sys;
if (wmi_has_guid(WMID_GUID2)) {
interface->debug.wmid_devices = get_wmid_devices();
err = create_debugfs();
if (err)
- return err;
+ goto error_create_debugfs;
}
/* Override any initial settings with values from the commandline */
@@ -1350,15 +1359,23 @@ static int __init acer_wmi_init(void)
return 0;
+error_create_debugfs:
+ remove_sysfs(acer_platform_device);
+error_create_sys:
+ platform_device_del(acer_platform_device);
+error_device_add:
+ platform_device_put(acer_platform_device);
+error_device_alloc:
+ platform_driver_unregister(&acer_platform_driver);
error_platform_register:
- return -ENODEV;
+ return err;
}
static void __exit acer_wmi_exit(void)
{
remove_sysfs(acer_platform_device);
remove_debugfs();
- platform_device_del(acer_platform_device);
+ platform_device_unregister(acer_platform_device);
platform_driver_unregister(&acer_platform_driver);
printk(ACER_INFO "Acer Laptop WMI Extras unloaded\n");