This patch series removes three features deemed obsolete:
- the debug_dump_wdg module param:
- suffers from garbled output due to pr_cont()
- functionality is better provided by "fwts wmi"
- the debug_event module param:
- pr_cont() usage
- uses the deprecated GUID-based API
- largely replaced by the ACPI netlink interface
- ioctl interface
- used only by a single driver, no adoption otherwise
- numerous design issues
Since the ioctl interface is actually used by userspace programs,
the only user (the dell-smbios-wmi driver) was modified to implement
the necessary pieces itself so that no regressions are expected.
The series depends on
commit cbf54f37600e ("platform/x86: wmi: Skip blocks with zero instances"),
which is currently in the "fixes" tree.
All patches where tested on a Dell Inspiron 3505 and work without
issues.
Changes since v1:
- add Reviewed-by to patches 1, 2 and 5
- drop patch adding the driver development guide
- rework error handling in dell-smbios-wmi
Armin Wolf (5):
platform/x86: wmi: Remove debug_dump_wdg module param
platform/x86: wmi: Remove debug_event module param
platform/x86: dell-smbios-wmi: Use devm_get_free_pages()
platform/x86: dell-smbios-wmi: Stop using WMI chardev
platform/x86: wmi: Remove chardev interface
drivers/platform/x86/dell/dell-smbios-wmi.c | 173 ++++++++----
drivers/platform/x86/wmi.c | 285 +-------------------
include/linux/wmi.h | 8 -
3 files changed, 132 insertions(+), 334 deletions(-)
--
2.39.2
Users can already listen to ACPI WMI events through
the ACPI netlink interface. The old wmi_notify_debug()
interface also uses the deprecated GUID-based interface.
Remove it to make the event handling code more readable.
Reviewed-by: Ilpo Järvinen <[email protected]>
Signed-off-by: Armin Wolf <[email protected]>
---
drivers/platform/x86/wmi.c | 74 ++++----------------------------------
1 file changed, 7 insertions(+), 67 deletions(-)
diff --git a/drivers/platform/x86/wmi.c b/drivers/platform/x86/wmi.c
index e8019bc19b4f..7df5b5ee7983 100644
--- a/drivers/platform/x86/wmi.c
+++ b/drivers/platform/x86/wmi.c
@@ -85,11 +85,6 @@ struct wmi_block {
#define ACPI_WMI_STRING BIT(2) /* GUID takes & returns a string */
#define ACPI_WMI_EVENT BIT(3) /* GUID is an event */
-static bool debug_event;
-module_param(debug_event, bool, 0444);
-MODULE_PARM_DESC(debug_event,
- "Log WMI Events [0/1]");
-
static const struct acpi_device_id wmi_device_ids[] = {
{"PNP0C14", 0},
{"pnp0c14", 0},
@@ -592,42 +587,6 @@ acpi_status wmidev_block_set(struct wmi_device *wdev, u8 instance, const struct
}
EXPORT_SYMBOL_GPL(wmidev_block_set);
-static void wmi_notify_debug(u32 value, void *context)
-{
- struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
- union acpi_object *obj;
- acpi_status status;
-
- status = wmi_get_event_data(value, &response);
- if (status != AE_OK) {
- pr_info("bad event status 0x%x\n", status);
- return;
- }
-
- obj = response.pointer;
- if (!obj)
- return;
-
- pr_info("DEBUG: event 0x%02X ", value);
- switch (obj->type) {
- case ACPI_TYPE_BUFFER:
- pr_cont("BUFFER_TYPE - length %u\n", obj->buffer.length);
- break;
- case ACPI_TYPE_STRING:
- pr_cont("STRING_TYPE - %s\n", obj->string.pointer);
- break;
- case ACPI_TYPE_INTEGER:
- pr_cont("INTEGER_TYPE - %llu\n", obj->integer.value);
- break;
- case ACPI_TYPE_PACKAGE:
- pr_cont("PACKAGE_TYPE - %u elements\n", obj->package.count);
- break;
- default:
- pr_cont("object type 0x%X\n", obj->type);
- }
- kfree(obj);
-}
-
/**
* wmi_install_notify_handler - Register handler for WMI events (deprecated)
* @guid: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba
@@ -656,8 +615,7 @@ acpi_status wmi_install_notify_handler(const char *guid,
acpi_status wmi_status;
if (guid_equal(&block->gblock.guid, &guid_input)) {
- if (block->handler &&
- block->handler != wmi_notify_debug)
+ if (block->handler)
return AE_ALREADY_ACQUIRED;
block->handler = handler;
@@ -698,22 +656,14 @@ acpi_status wmi_remove_notify_handler(const char *guid)
acpi_status wmi_status;
if (guid_equal(&block->gblock.guid, &guid_input)) {
- if (!block->handler ||
- block->handler == wmi_notify_debug)
+ if (!block->handler)
return AE_NULL_ENTRY;
- if (debug_event) {
- block->handler = wmi_notify_debug;
- status = AE_OK;
- } else {
- wmi_status = wmi_method_enable(block, false);
- block->handler = NULL;
- block->handler_data = NULL;
- if ((wmi_status != AE_OK) ||
- ((wmi_status == AE_OK) &&
- (status == AE_NOT_EXIST)))
- status = wmi_status;
- }
+ wmi_status = wmi_method_enable(block, false);
+ block->handler = NULL;
+ block->handler_data = NULL;
+ if (wmi_status != AE_OK || (wmi_status == AE_OK && status == AE_NOT_EXIST))
+ status = wmi_status;
}
}
@@ -1340,17 +1290,10 @@ static int parse_wdg(struct device *wmi_bus_dev, struct platform_device *pdev)
list_add_tail(&wblock->list, &wmi_block_list);
- if (debug_event) {
- wblock->handler = wmi_notify_debug;
- wmi_method_enable(wblock, true);
- }
-
retval = wmi_add_device(pdev, &wblock->dev);
if (retval) {
dev_err(wmi_bus_dev, "failed to register %pUL\n",
&wblock->gblock.guid);
- if (debug_event)
- wmi_method_enable(wblock, false);
list_del(&wblock->list);
put_device(&wblock->dev.dev);
@@ -1445,9 +1388,6 @@ static void acpi_wmi_notify_handler(acpi_handle handle, u32 event,
wblock->handler(event, wblock->handler_data);
}
- if (debug_event)
- pr_info("DEBUG: GUID %pUL event 0x%02X\n", &wblock->gblock.guid, event);
-
acpi_bus_generate_netlink_event(
wblock->acpi_device->pnp.device_class,
dev_name(&wblock->dev.dev),
--
2.39.2
The WMI chardev API will be removed in the near future.
Reimplement the necessary bits used by this driver so
that userspace software depending on it does no break.
Signed-off-by: Armin Wolf <[email protected]>
---
drivers/platform/x86/dell/dell-smbios-wmi.c | 161 ++++++++++++++------
1 file changed, 117 insertions(+), 44 deletions(-)
diff --git a/drivers/platform/x86/dell/dell-smbios-wmi.c b/drivers/platform/x86/dell/dell-smbios-wmi.c
index 7eb7c61bb27d..ae9012549560 100644
--- a/drivers/platform/x86/dell/dell-smbios-wmi.c
+++ b/drivers/platform/x86/dell/dell-smbios-wmi.c
@@ -8,11 +8,14 @@
#include <linux/device.h>
#include <linux/dmi.h>
+#include <linux/fs.h>
#include <linux/list.h>
+#include <linux/miscdevice.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/uaccess.h>
#include <linux/wmi.h>
+#include <uapi/linux/wmi.h>
#include "dell-smbios.h"
#include "dell-wmi-descriptor.h"
@@ -33,7 +36,8 @@ struct wmi_smbios_priv {
struct list_head list;
struct wmi_device *wdev;
struct device *child;
- u32 req_buf_size;
+ u64 req_buf_size;
+ struct miscdevice char_dev;
};
static LIST_HEAD(wmi_list);
@@ -109,48 +113,115 @@ static int dell_smbios_wmi_call(struct calling_interface_buffer *buffer)
return ret;
}
-static long dell_smbios_wmi_filter(struct wmi_device *wdev, unsigned int cmd,
- struct wmi_ioctl_buffer *arg)
+static int dell_smbios_wmi_open(struct inode *inode, struct file *filp)
{
struct wmi_smbios_priv *priv;
- int ret = 0;
-
- switch (cmd) {
- case DELL_WMI_SMBIOS_CMD:
- mutex_lock(&call_mutex);
- priv = dev_get_drvdata(&wdev->dev);
- if (!priv) {
- ret = -ENODEV;
- goto fail_smbios_cmd;
- }
- memcpy(priv->buf, arg, priv->req_buf_size);
- if (dell_smbios_call_filter(&wdev->dev, &priv->buf->std)) {
- dev_err(&wdev->dev, "Invalid call %d/%d:%8x\n",
- priv->buf->std.cmd_class,
- priv->buf->std.cmd_select,
- priv->buf->std.input[0]);
- ret = -EFAULT;
- goto fail_smbios_cmd;
- }
- ret = run_smbios_call(priv->wdev);
- if (ret)
- goto fail_smbios_cmd;
- memcpy(arg, priv->buf, priv->req_buf_size);
-fail_smbios_cmd:
- mutex_unlock(&call_mutex);
- break;
- default:
- ret = -ENOIOCTLCMD;
+
+ priv = container_of(filp->private_data, struct wmi_smbios_priv, char_dev);
+ filp->private_data = priv;
+
+ return nonseekable_open(inode, filp);
+}
+
+static ssize_t dell_smbios_wmi_read(struct file *filp, char __user *buffer, size_t length,
+ loff_t *offset)
+{
+ struct wmi_smbios_priv *priv = filp->private_data;
+
+ return simple_read_from_buffer(buffer, length, offset, &priv->req_buf_size,
+ sizeof(priv->req_buf_size));
+}
+
+static long dell_smbios_wmi_do_ioctl(struct wmi_smbios_priv *priv,
+ struct dell_wmi_smbios_buffer __user *arg)
+{
+ long ret;
+
+ if (get_user(priv->buf->length, &arg->length))
+ return -EFAULT;
+
+ if (priv->buf->length < priv->req_buf_size)
+ return -EINVAL;
+
+ /* if it's too big, warn, driver will only use what is needed */
+ if (priv->buf->length > priv->req_buf_size)
+ dev_err(&priv->wdev->dev, "Buffer %llu is bigger than required %llu\n",
+ priv->buf->length, priv->req_buf_size);
+
+ if (copy_from_user(priv->buf, arg, priv->req_buf_size))
+ return -EFAULT;
+
+ if (dell_smbios_call_filter(&priv->wdev->dev, &priv->buf->std)) {
+ dev_err(&priv->wdev->dev, "Invalid call %d/%d:%8x\n",
+ priv->buf->std.cmd_class,
+ priv->buf->std.cmd_select,
+ priv->buf->std.input[0]);
+
+ return -EINVAL;
}
+
+ ret = run_smbios_call(priv->wdev);
+ if (ret)
+ return ret;
+
+ if (copy_to_user(arg, priv->buf, priv->req_buf_size))
+ return -EFAULT;
+
+ return 0;
+}
+
+static long dell_smbios_wmi_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+ struct dell_wmi_smbios_buffer __user *input = (struct dell_wmi_smbios_buffer __user *)arg;
+ struct wmi_smbios_priv *priv = filp->private_data;
+ long ret;
+
+ if (cmd != DELL_WMI_SMBIOS_CMD)
+ return -ENOIOCTLCMD;
+
+ mutex_lock(&call_mutex);
+ ret = dell_smbios_wmi_do_ioctl(priv, input);
+ mutex_unlock(&call_mutex);
+
return ret;
}
+static const struct file_operations dell_smbios_wmi_fops = {
+ .owner = THIS_MODULE,
+ .open = dell_smbios_wmi_open,
+ .read = dell_smbios_wmi_read,
+ .unlocked_ioctl = dell_smbios_wmi_ioctl,
+ .compat_ioctl = compat_ptr_ioctl,
+};
+
+static void dell_smbios_wmi_unregister_chardev(void *data)
+{
+ struct miscdevice *char_dev = data;
+
+ misc_deregister(char_dev);
+}
+
+static int dell_smbios_wmi_register_chardev(struct wmi_smbios_priv *priv)
+{
+ int ret;
+
+ priv->char_dev.minor = MISC_DYNAMIC_MINOR;
+ priv->char_dev.name = "wmi/dell-smbios";
+ priv->char_dev.fops = &dell_smbios_wmi_fops;
+ priv->char_dev.mode = 0444;
+
+ ret = misc_register(&priv->char_dev);
+ if (ret < 0)
+ return ret;
+
+ return devm_add_action_or_reset(&priv->wdev->dev, dell_smbios_wmi_unregister_chardev,
+ &priv->char_dev);
+}
+
static int dell_smbios_wmi_probe(struct wmi_device *wdev, const void *context)
{
- struct wmi_driver *wdriver =
- container_of(wdev->dev.driver, struct wmi_driver, driver);
struct wmi_smbios_priv *priv;
- u32 hotfix;
+ u32 buffer_size, hotfix;
int count;
int ret;
@@ -163,39 +234,42 @@ static int dell_smbios_wmi_probe(struct wmi_device *wdev, const void *context)
if (!priv)
return -ENOMEM;
+ priv->wdev = wdev;
+ dev_set_drvdata(&wdev->dev, priv);
+
/* WMI buffer size will be either 4k or 32k depending on machine */
- if (!dell_wmi_get_size(&priv->req_buf_size))
+ if (!dell_wmi_get_size(&buffer_size))
return -EPROBE_DEFER;
+ priv->req_buf_size = buffer_size;
+
/* some SMBIOS calls fail unless BIOS contains hotfix */
if (!dell_wmi_get_hotfix(&hotfix))
return -EPROBE_DEFER;
- if (!hotfix) {
+
+ if (!hotfix)
dev_warn(&wdev->dev,
"WMI SMBIOS userspace interface not supported(%u), try upgrading to a newer BIOS\n",
hotfix);
- wdriver->filter_callback = NULL;
- }
/* add in the length object we will use internally with ioctl */
priv->req_buf_size += sizeof(u64);
- ret = set_required_buffer_size(wdev, priv->req_buf_size);
- if (ret)
- return ret;
count = get_order(priv->req_buf_size);
priv->buf = (void *)devm_get_free_pages(&wdev->dev, GFP_KERNEL, count);
if (!priv->buf)
return -ENOMEM;
+ ret = dell_smbios_wmi_register_chardev(priv);
+ if (ret)
+ return ret;
+
/* ID is used by dell-smbios to set priority of drivers */
wdev->dev.id = 1;
ret = dell_smbios_register_device(&wdev->dev, &dell_smbios_wmi_call);
if (ret)
return ret;
- priv->wdev = wdev;
- dev_set_drvdata(&wdev->dev, priv);
mutex_lock(&list_mutex);
list_add_tail(&priv->list, &wmi_list);
mutex_unlock(&list_mutex);
@@ -250,7 +324,6 @@ static struct wmi_driver dell_smbios_wmi_driver = {
.probe = dell_smbios_wmi_probe,
.remove = dell_smbios_wmi_remove,
.id_table = dell_smbios_wmi_id_table,
- .filter_callback = dell_smbios_wmi_filter,
};
int init_dell_smbios_wmi(void)
--
2.39.2
The design of the WMI chardev interface is broken:
- it assumes that WMI drivers are not instantiated twice
- it offers next to no abstractions, the WMI driver gets
a raw byte buffer
- it is only used by a single driver, something which is
unlikely to change
Since the only user (dell-smbios-wmi) has been migrated
to his own ioctl interface, remove it.
Reviewed-by: Ilpo Järvinen <[email protected]>
Signed-off-by: Armin Wolf <[email protected]>
---
drivers/platform/x86/wmi.c | 180 ++-----------------------------------
include/linux/wmi.h | 8 --
2 files changed, 5 insertions(+), 183 deletions(-)
diff --git a/drivers/platform/x86/wmi.c b/drivers/platform/x86/wmi.c
index 7df5b5ee7983..7303702290e5 100644
--- a/drivers/platform/x86/wmi.c
+++ b/drivers/platform/x86/wmi.c
@@ -23,17 +23,14 @@
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/list.h>
-#include <linux/miscdevice.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/sysfs.h>
#include <linux/types.h>
-#include <linux/uaccess.h>
#include <linux/uuid.h>
#include <linux/wmi.h>
#include <linux/fs.h>
-#include <uapi/linux/wmi.h>
MODULE_AUTHOR("Carlos Corbacho");
MODULE_DESCRIPTION("ACPI-WMI Mapping Driver");
@@ -66,12 +63,9 @@ struct wmi_block {
struct wmi_device dev;
struct list_head list;
struct guid_block gblock;
- struct miscdevice char_dev;
- struct mutex char_mutex;
struct acpi_device *acpi_device;
wmi_notify_handler handler;
void *handler_data;
- u64 req_buf_size;
unsigned long flags;
};
@@ -256,26 +250,6 @@ static void wmi_device_put(struct wmi_device *wdev)
* Exported WMI functions
*/
-/**
- * set_required_buffer_size - Sets the buffer size needed for performing IOCTL
- * @wdev: A wmi bus device from a driver
- * @length: Required buffer size
- *
- * Allocates memory needed for buffer, stores the buffer size in that memory.
- *
- * Return: 0 on success or a negative error code for failure.
- */
-int set_required_buffer_size(struct wmi_device *wdev, u64 length)
-{
- struct wmi_block *wblock;
-
- wblock = container_of(wdev, struct wmi_block, dev);
- wblock->req_buf_size = length;
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(set_required_buffer_size);
-
/**
* wmi_instance_count - Get number of WMI object instances
* @guid_string: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba
@@ -884,111 +858,12 @@ static int wmi_dev_match(struct device *dev, struct device_driver *driver)
return 0;
}
-static int wmi_char_open(struct inode *inode, struct file *filp)
-{
- /*
- * The miscdevice already stores a pointer to itself
- * inside filp->private_data
- */
- struct wmi_block *wblock = container_of(filp->private_data, struct wmi_block, char_dev);
-
- filp->private_data = wblock;
-
- return nonseekable_open(inode, filp);
-}
-
-static ssize_t wmi_char_read(struct file *filp, char __user *buffer,
- size_t length, loff_t *offset)
-{
- struct wmi_block *wblock = filp->private_data;
-
- return simple_read_from_buffer(buffer, length, offset,
- &wblock->req_buf_size,
- sizeof(wblock->req_buf_size));
-}
-
-static long wmi_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
-{
- struct wmi_ioctl_buffer __user *input =
- (struct wmi_ioctl_buffer __user *) arg;
- struct wmi_block *wblock = filp->private_data;
- struct wmi_ioctl_buffer *buf;
- struct wmi_driver *wdriver;
- int ret;
-
- if (_IOC_TYPE(cmd) != WMI_IOC)
- return -ENOTTY;
-
- /* make sure we're not calling a higher instance than exists*/
- if (_IOC_NR(cmd) >= wblock->gblock.instance_count)
- return -EINVAL;
-
- mutex_lock(&wblock->char_mutex);
- buf = wblock->handler_data;
- if (get_user(buf->length, &input->length)) {
- dev_dbg(&wblock->dev.dev, "Read length from user failed\n");
- ret = -EFAULT;
- goto out_ioctl;
- }
- /* if it's too small, abort */
- if (buf->length < wblock->req_buf_size) {
- dev_err(&wblock->dev.dev,
- "Buffer %lld too small, need at least %lld\n",
- buf->length, wblock->req_buf_size);
- ret = -EINVAL;
- goto out_ioctl;
- }
- /* if it's too big, warn, driver will only use what is needed */
- if (buf->length > wblock->req_buf_size)
- dev_warn(&wblock->dev.dev,
- "Buffer %lld is bigger than required %lld\n",
- buf->length, wblock->req_buf_size);
-
- /* copy the structure from userspace */
- if (copy_from_user(buf, input, wblock->req_buf_size)) {
- dev_dbg(&wblock->dev.dev, "Copy %llu from user failed\n",
- wblock->req_buf_size);
- ret = -EFAULT;
- goto out_ioctl;
- }
-
- /* let the driver do any filtering and do the call */
- wdriver = drv_to_wdrv(wblock->dev.dev.driver);
- if (!try_module_get(wdriver->driver.owner)) {
- ret = -EBUSY;
- goto out_ioctl;
- }
- ret = wdriver->filter_callback(&wblock->dev, cmd, buf);
- module_put(wdriver->driver.owner);
- if (ret)
- goto out_ioctl;
-
- /* return the result (only up to our internal buffer size) */
- if (copy_to_user(input, buf, wblock->req_buf_size)) {
- dev_dbg(&wblock->dev.dev, "Copy %llu to user failed\n",
- wblock->req_buf_size);
- ret = -EFAULT;
- }
-
-out_ioctl:
- mutex_unlock(&wblock->char_mutex);
- return ret;
-}
-
-static const struct file_operations wmi_fops = {
- .owner = THIS_MODULE,
- .read = wmi_char_read,
- .open = wmi_char_open,
- .unlocked_ioctl = wmi_ioctl,
- .compat_ioctl = compat_ptr_ioctl,
-};
static int wmi_dev_probe(struct device *dev)
{
struct wmi_block *wblock = dev_to_wblock(dev);
struct wmi_driver *wdriver = drv_to_wdrv(dev->driver);
int ret = 0;
- char *buf;
if (ACPI_FAILURE(wmi_method_enable(wblock, true)))
dev_warn(dev, "failed to enable device -- probing anyway\n");
@@ -996,55 +871,17 @@ static int wmi_dev_probe(struct device *dev)
if (wdriver->probe) {
ret = wdriver->probe(dev_to_wdev(dev),
find_guid_context(wblock, wdriver));
- if (ret != 0)
- goto probe_failure;
- }
-
- /* driver wants a character device made */
- if (wdriver->filter_callback) {
- /* check that required buffer size declared by driver or MOF */
- if (!wblock->req_buf_size) {
- dev_err(&wblock->dev.dev,
- "Required buffer size not set\n");
- ret = -EINVAL;
- goto probe_failure;
- }
+ if (!ret) {
+ if (ACPI_FAILURE(wmi_method_enable(wblock, false)))
+ dev_warn(dev, "Failed to disable device\n");
- wblock->handler_data = kmalloc(wblock->req_buf_size,
- GFP_KERNEL);
- if (!wblock->handler_data) {
- ret = -ENOMEM;
- goto probe_failure;
- }
-
- buf = kasprintf(GFP_KERNEL, "wmi/%s", wdriver->driver.name);
- if (!buf) {
- ret = -ENOMEM;
- goto probe_string_failure;
- }
- wblock->char_dev.minor = MISC_DYNAMIC_MINOR;
- wblock->char_dev.name = buf;
- wblock->char_dev.fops = &wmi_fops;
- wblock->char_dev.mode = 0444;
- ret = misc_register(&wblock->char_dev);
- if (ret) {
- dev_warn(dev, "failed to register char dev: %d\n", ret);
- ret = -ENOMEM;
- goto probe_misc_failure;
+ return ret;
}
}
set_bit(WMI_PROBED, &wblock->flags);
- return 0;
-probe_misc_failure:
- kfree(buf);
-probe_string_failure:
- kfree(wblock->handler_data);
-probe_failure:
- if (ACPI_FAILURE(wmi_method_enable(wblock, false)))
- dev_warn(dev, "failed to disable device\n");
- return ret;
+ return 0;
}
static void wmi_dev_remove(struct device *dev)
@@ -1054,12 +891,6 @@ static void wmi_dev_remove(struct device *dev)
clear_bit(WMI_PROBED, &wblock->flags);
- if (wdriver->filter_callback) {
- misc_deregister(&wblock->char_dev);
- kfree(wblock->char_dev.name);
- kfree(wblock->handler_data);
- }
-
if (wdriver->remove)
wdriver->remove(dev_to_wdev(dev));
@@ -1131,7 +962,6 @@ static int wmi_create_device(struct device *wmi_bus_dev,
if (wblock->gblock.flags & ACPI_WMI_METHOD) {
wblock->dev.dev.type = &wmi_type_method;
- mutex_init(&wblock->char_mutex);
goto out_init;
}
diff --git a/include/linux/wmi.h b/include/linux/wmi.h
index 8a643c39fcce..50f7f1e4fd4f 100644
--- a/include/linux/wmi.h
+++ b/include/linux/wmi.h
@@ -11,7 +11,6 @@
#include <linux/device.h>
#include <linux/acpi.h>
#include <linux/mod_devicetable.h>
-#include <uapi/linux/wmi.h>
/**
* struct wmi_device - WMI device structure
@@ -47,8 +46,6 @@ acpi_status wmidev_block_set(struct wmi_device *wdev, u8 instance, const struct
u8 wmidev_instance_count(struct wmi_device *wdev);
-extern int set_required_buffer_size(struct wmi_device *wdev, u64 length);
-
/**
* struct wmi_driver - WMI driver structure
* @driver: Driver model structure
@@ -57,11 +54,8 @@ extern int set_required_buffer_size(struct wmi_device *wdev, u64 length);
* @probe: Callback for device binding
* @remove: Callback for device unbinding
* @notify: Callback for receiving WMI events
- * @filter_callback: Callback for filtering device IOCTLs
*
* This represents WMI drivers which handle WMI devices.
- * @filter_callback is only necessary for drivers which
- * want to set up a WMI IOCTL interface.
*/
struct wmi_driver {
struct device_driver driver;
@@ -71,8 +65,6 @@ struct wmi_driver {
int (*probe)(struct wmi_device *wdev, const void *context);
void (*remove)(struct wmi_device *wdev);
void (*notify)(struct wmi_device *device, union acpi_object *data);
- long (*filter_callback)(struct wmi_device *wdev, unsigned int cmd,
- struct wmi_ioctl_buffer *arg);
};
extern int __must_check __wmi_driver_register(struct wmi_driver *driver,
--
2.39.2
Hi,
On 12/10/23 21:24, Armin Wolf wrote:
> This patch series removes three features deemed obsolete:
> - the debug_dump_wdg module param:
> - suffers from garbled output due to pr_cont()
> - functionality is better provided by "fwts wmi"
> - the debug_event module param:
> - pr_cont() usage
> - uses the deprecated GUID-based API
> - largely replaced by the ACPI netlink interface
> - ioctl interface
> - used only by a single driver, no adoption otherwise
> - numerous design issues
>
> Since the ioctl interface is actually used by userspace programs,
> the only user (the dell-smbios-wmi driver) was modified to implement
> the necessary pieces itself so that no regressions are expected.
>
> The series depends on
> commit cbf54f37600e ("platform/x86: wmi: Skip blocks with zero instances"),
> which is currently in the "fixes" tree.
>
> All patches where tested on a Dell Inspiron 3505 and work without
> issues.
Thank you for your patch-series, I've applied the series to my
review-hans branch:
https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git/log/?h=review-hans
Note it will show up in my review-hans branch once I've pushed my
local branch there, which might take a while.
Once I've run some tests on this branch the patches there will be
added to the platform-drivers-x86/for-next branch and eventually
will be included in the pdx86 pull-request to Linus for the next
merge-window.
Regards,
Hans
> Changes since v1:
> - add Reviewed-by to patches 1, 2 and 5
> - drop patch adding the driver development guide
> - rework error handling in dell-smbios-wmi
>
> Armin Wolf (5):
> platform/x86: wmi: Remove debug_dump_wdg module param
> platform/x86: wmi: Remove debug_event module param
> platform/x86: dell-smbios-wmi: Use devm_get_free_pages()
> platform/x86: dell-smbios-wmi: Stop using WMI chardev
> platform/x86: wmi: Remove chardev interface
>
> drivers/platform/x86/dell/dell-smbios-wmi.c | 173 ++++++++----
> drivers/platform/x86/wmi.c | 285 +-------------------
> include/linux/wmi.h | 8 -
> 3 files changed, 132 insertions(+), 334 deletions(-)
>
> --
> 2.39.2
>