On Mon, 18 Nov 2024, zhixin zhang wrote:
> From: zhixin zhang <zhangzx36@xxxxxxxxxx>
>
> This driver provides support for modifying the performance mode
> function of Lenovo's Legion Go series.
>
> Signed-off-by: zhixin zhang <zhangzx36@xxxxxxxxxx>
> ---
> drivers/platform/x86/Kconfig | 9 +
> drivers/platform/x86/Makefile | 1 +
> drivers/platform/x86/legion-go-wmi.c | 552 +++++++++++++++++++++++++++
> 3 files changed, 562 insertions(+)
> create mode 100644 drivers/platform/x86/legion-go-wmi.c
>
> diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
> index 3875abba5a79..d04018f69dc6 100644
> --- a/drivers/platform/x86/Kconfig
> +++ b/drivers/platform/x86/Kconfig
> @@ -483,6 +483,15 @@ config LENOVO_YMC
> This driver maps the Tablet Mode Control switch to SW_TABLET_MODE input
> events for Lenovo Yoga notebooks.
>
> +config LEGION_GO_WMI
> + tristate "Lenovo Legion Go WMI Control"
> + depends on ACPI_WMI
> + depends on INPUT
> + help
> + This driver provides support for modifying the performance mode
> + function of Lenovo's Legion Go series, as well as the ability to
> + set CPU power consumption in custom mode.
> +
> config SENSORS_HDAPS
> tristate "Thinkpad Hard Drive Active Protection System (hdaps)"
> depends on INPUT
> diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile
> index e1b142947067..74b1f107084f 100644
> --- a/drivers/platform/x86/Makefile
> +++ b/drivers/platform/x86/Makefile
> @@ -68,6 +68,7 @@ obj-$(CONFIG_THINKPAD_LMI) += think-lmi.o
> obj-$(CONFIG_YOGABOOK) += lenovo-yogabook.o
> obj-$(CONFIG_YT2_1380) += lenovo-yoga-tab2-pro-1380-fastcharger.o
> obj-$(CONFIG_LENOVO_WMI_CAMERA) += lenovo-wmi-camera.o
> +obj-$(CONFIG_LEGION_GO_WMI) += legion-go-wmi.o
>
> # Intel
> obj-y += intel/
> diff --git a/drivers/platform/x86/legion-go-wmi.c b/drivers/platform/x86/legion-go-wmi.c
> new file mode 100644
> index 000000000000..e319219c3ace
> --- /dev/null
> +++ b/drivers/platform/x86/legion-go-wmi.c
> @@ -0,0 +1,552 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +/*
> + * legion-go-wmi.c - Lenovo Legion Go WMI Control
> + *
> + * Copyright © 2024 zhixin zhang <zhangzx36@xxxxxxxxxx>
> + */
> +
> +#include <linux/kernel.h>
> +#include <linux/acpi.h>
> +#include <linux/printk.h>
> +#include <linux/module.h>
> +#include <linux/wmi.h>
> +#include <linux/errno.h>
> +#include <linux/string.h>
> +#include <linux/proc_fs.h>
> +#include <linux/slab.h>
> +#include <linux/uaccess.h>
> +#include <linux/version.h>
Order alphabetically.
> +
> +//extern struct proc_dir_entry *acpi_root_dir;
???
> +struct proc_dir_entry *acpi_root_dir;
> +
> +#define BUFFER_SIZE 256
> +
> +#define LEGION_GO_WMI_GAMEZONE_GUID "887B54E3-DDDC-4B2C-8B88-68A26A8835D0"
> +#define LEGION_GO_WMI_OTHER_GUID "dc2a8805-3a8c-41ba-a6f7-092e0089cd3b"
> +
> +//wmi_device_id context string
> +#define LEGION_GO_WMI_GAMEZONE_CONTEXT "GameZone"
> +#define LEGION_GO_WMI_OTHER_CONTEXT "Other"
> +
> +//funciton name
function
All your comments seem to miss space.
> +#define CMD_SET_SPL "SetSPL"
> +#define CMD_GET_SPL "GetSPL"
> +#define CMD_SET_SPPT "SetSPPT"
> +#define CMD_GET_SPPT "GetSPPT"
> +#define CMD_SET_FPPT "SetFPPT"
> +#define CMD_GET_FPPT "GetFPPT"
> +#define CMD_SET_SMART_FAN_MODE "SetSmartFanMode"
> +#define CMD_GET_SMART_FAN_MODE "GetSmartFanMode"
> +
> +//function arg for ids
> +enum legion_go_wmi_ids{
> + ARG_SPL_CUSTOM_MODE = 0x0102FF00,
> + ARG_SPL_GET_VALUE = 0x0102FF00,
> +
> + ARG_SPPT_CUSTOM_MODE = 0x0101FF00,
> + ARG_SPPT_GET_VALUE = 0x0101FF00,
> +
> + ARG_FPPT_CUSTOM_MODE = 0x0103FF00,
> + ARG_FPPT_GET_VALUE = 0x0103FF00,
> +
> + ARG_SMART_FAN_QUIENT_MODE = 0x1,
> + ARG_SMART_FAN_BALANCE_MODE = 0x2,
> + ARG_SMART_FAN_PERFORMANCE_MODE = 0x3,
> + ARG_SMART_FAN_CUSTOM_MODE = 0xFF,
Align values.
Are these groups actually independent? If yes, they don't belong into same
enum.
> +};
> +
> +static const struct wmi_device_id legion_go_wmi_id_table[] = {
> + { LEGION_GO_WMI_GAMEZONE_GUID, LEGION_GO_WMI_GAMEZONE_CONTEXT },
> + { LEGION_GO_WMI_OTHER_GUID, LEGION_GO_WMI_OTHER_CONTEXT },
> + { }
> +};
> +
> +
Extra newline, but can you also place the array close to where it's used.
> +enum legion_go_wmi_gamezone_method {
> + legion_go_wmi_gamezone_method = 0xAA, // WMAA, DSDT
> + LEGION_GO_WMI_OTHER_METHOD = 0xAE, // WMAA, DSDT
> +};
> +
> +//wmi command
> +enum legion_go_wmi_command {
> + // smart fan mode
> + LEGION_GO_WMI_GAMEZONE_SET_SMARTFANMODE = 0x2C,
> + LEGION_GO_WMI_GAMEZONE_GET_SMARTFANMODE = 0x2D,
> + // set bois feature
> + LEGION_GO_WMI_OTHER_SET_FEATURE_VALUE = 0x12,
> + LEGION_GO_WMI_OTHER_GET_FEATURE_VALUE = 0x11,
> +};
> +
> +//wmi call function
> +enum legion_go_call_function {
> + LEGION_GO_FUNC_NONE,
> + LEGION_GO_FUNC_SET_SPL,
> + LEGION_GO_FUNC_GET_SPL,
> + LEGION_GO_FUNC_SET_SPPT,
> + LEGION_GO_FUNC_GET_SPPT,
> + LEGION_GO_FUNC_SET_FPPT,
> + LEGION_GO_FUNC_GET_FPPT,
> + LEGION_GO_FUNC_SET_SMART_FAN_MODE,
> + LEGION_GO_FUNC_GET_SMART_FAN_MODE
> +};
> +
> +struct legion_go_wmi_args_3i {
> + u32 arg1;
> + u32 arg2;
> + u32 arg3;
> +};
> +
> +struct legion_go_wmi_args_2i {
> + u32 arg1;
> + u32 arg2;
> +};
> +
> +struct legion_go_wmi_args_1i {
> + u32 arg1;
> +};
> +
> +struct legion_go_global {
> + struct wmi_device *legion_device[2]; //0:"GameZone" 1:"Other"
> + enum legion_go_call_function last_call_function;
> + bool first_read;
> + struct proc_dir_entry *acpi_entry;
> + char result_buffer[BUFFER_SIZE];
> +};
> +
> +static struct legion_go_global g_Legion_Go_Global = {
> + .legion_device = {NULL, NULL},
> + .last_call_function = LEGION_GO_FUNC_NONE,
> + .first_read = true,
> + .acpi_entry = NULL,
> +};
> +
> +static acpi_status legion_go_wmi_perform_query(struct wmi_device *wdev,
> + enum legion_go_wmi_gamezone_method method_id,
> + const struct acpi_buffer *in,
> + struct acpi_buffer *out)
> +{
> + acpi_status ret = wmidev_evaluate_method(wdev, 0x0, method_id, in, out);
> +
> + if (ACPI_FAILURE(ret)) {
> + dev_warn(&wdev->dev, "LEGION GO WMI: WMI query failed with error: %d\n", ret);
> + return -EIO;
> + }
> +
> + return 0;
> +}
> +
> +static acpi_status legion_go_wmi_query_integer(struct wmi_device *wdev,
> + enum legion_go_wmi_gamezone_method method_id,
> + const struct acpi_buffer *in,
> + u32 *res)
Does this query "integer" or u32 as per the res parameter? If the latter,
rename accordingly please. (And integer could be "int" too but I suspect
you want _u32 in the name instead)
> +{
> + union acpi_object *obj;
> + struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };
> + acpi_status ret;
Reverse xmas-tree order.
> +
> + ret = legion_go_wmi_perform_query(wdev, method_id, in, &result);
> + if (ret) {
> + return ret;
> + }
Unnecessary braces.
> +
> + obj = result.pointer;
> + if (obj && obj->type == ACPI_TYPE_INTEGER) {
> + *res = obj->integer.value;
> + }
> + else {
} else {
But then braces are unnecessary for one line blocks.
> + ret = -EIO;
> + }
> +
> + kfree(result.pointer);
> + return ret;
> +}
> +
> +
> +/**
> + * procfs write callback. Called when writing into /proc/acpi/call.
Not formatted according to kerneldoc, either make it kerneldoc compliant
or change /** -> /*
> +*/
> +static ssize_t acpi_proc_write(struct file *filp,
> + const char __user *buff,
> + size_t len,
> + loff_t *data)
Misaligned. Try to use less lines.
> +{
> + char input[2 * BUFFER_SIZE] = { '\0' };
Don't place large arrays into stack.
= {}; is enough to initialize.
> + union acpi_object *args;
> + int nargs, i;
> + char *method;
Use tabs for indentation.
> +
> + u32 prod_id;
> + acpi_status ret;
> +
> + if (len > sizeof(input) - 1) {
> + printk(KERN_ERR "LEGION GO WMI: Input too long! (%lu)\n", len);
Use dev_err() and don't provide prefix yourself. Although I'm not sure if
this is useful on KERN_ERR level...
> + return -ENOSPC;
-EINVAL
> + }
> +
> + if (copy_from_user( input, buff, len )) {
No spaces next to function opening and closing parenthesis.
> + return -EFAULT;
> + }
> +
> + input[len] = '\0';
> + if (input[len-1] == '\n')
> + input[len-1] = '\0';
> +
> + printk("LEGION GO WMI: procfs write is %s\n", input);
> +
> + char cmd[2 * BUFFER_SIZE] = { '\0' };
> + char arg1[2 * BUFFER_SIZE] = { '\0' };
Not from stack.
> + int arg1Num = 0;
> + int retNum = 0;
Wrong variable naming style.
> +
> + int pos = -1;
> + for(int i=0;i<2 * BUFFER_SIZE;i++) {
Wrong spacing.
> + if(input[i]== ',') {
Missing spaces.
Is the input guaranteed to have only single comma?
> + memcpy(cmd,input,i*sizeof(char));
Why you need to duplicate it again?
> + pos = i+1;
Missing spaces.
> + }
> + else if(input[i]=='\0' && pos != -1) {
> + memcpy(arg1,input+pos,(i-pos)*sizeof(char));
> + pos = i+1;
> + break;
> + }
> + }
> + if(pos == -1) {
> + memcpy(cmd,input,len*sizeof(char));
> + }
> + else {
> + printk(KERN_ERR "LEGION GO WMI: cmd = %s, arg1 : %s\n", cmd,arg1);
Are these your debug prints or what?
> + retNum = kstrtoint(arg1,10,&arg1Num);
Parse in place, there's no need to do a memcpy because of parsing int.
> + if(retNum != 0)
> + {
> + printk(KERN_ERR "LEGION GO WMI: arg1 = %s param error!\n",arg1);
> + return -ENOSPC;
-EINVAL? If given input is wrong/invalid, we return -EINVAL.
> + }
> + }
> +
> + if(ret == 0) {
Not initialized!??!
> + if(strcmp(cmd,CMD_SET_SPL)==0) {
So you memcpy earlier to just run strcmp(), why memcpy?
> + struct legion_go_wmi_args_2i args = {
> + .arg1 = ARG_SPL_CUSTOM_MODE,
> + .arg2 = arg1Num,
> + };
> + const struct acpi_buffer in = {
> + .length = sizeof(args),
> + .pointer = &args,
> + };
> +
> + g_Legion_Go_Global.last_call_function = LEGION_GO_FUNC_SET_SPL;
> +
> + ret = legion_go_wmi_query_integer(g_Legion_Go_Global.legion_device[1],
> + LEGION_GO_WMI_OTHER_SET_FEATURE_VALUE, &in, &prod_id);
> + if (ret == 0) {
> + dev_info(&g_Legion_Go_Global.legion_device[1]->dev,
Your variable name is perhaps a bit on the long side :-). Please try to
make it a bit shorter. Also no CAPS in variable names.
> + "LEGION GO WMI: SetSPL result is %d\n", prod_id);
Don't print info level message on success. You might not need to print
anything here as this kind of looks like something that was useful during
development or so.
> + }
> + else {
> + dev_warn(&g_Legion_Go_Global.legion_device[1]->dev,
> + "LEGION GO WMI: SetSPL query failed with err: %d\n", ret);
return error?
> + }
> + }
> + else if(strcmp(cmd,CMD_GET_SPL)==0) {
> + g_Legion_Go_Global.last_call_function = LEGION_GO_FUNC_GET_SPL;
> + }
> + else if(strcmp(cmd,CMD_SET_SPPT)==0) {
> + struct legion_go_wmi_args_2i args = {
> + .arg1 = ARG_SPPT_CUSTOM_MODE,
> + .arg2 = arg1Num,
> + };
> + const struct acpi_buffer in = {
> + .length = sizeof(args),
> + .pointer = &args,
> + };
> +
> + g_Legion_Go_Global.last_call_function = LEGION_GO_FUNC_SET_SPPT;
> +
> + ret = legion_go_wmi_query_integer(g_Legion_Go_Global.legion_device[1],
> + LEGION_GO_WMI_OTHER_SET_FEATURE_VALUE,
> + &in,
> + &prod_id);
> + if (ret == 0) {
> + dev_info(&g_Legion_Go_Global.legion_device[1]->dev,
> + "LEGION GO WMI: SetSPPT result is %d\n", prod_id);
> + }
> + else {
> + dev_warn(&g_Legion_Go_Global.legion_device[1]->dev,
> + "LEGION GO WMI: SetSPPT query failed with err: %d\n", ret);
> + }
> + }
> + else if(strcmp(cmd,CMD_GET_SPPT)==0) {
> + g_Legion_Go_Global.last_call_function = LEGION_GO_FUNC_GET_SPPT;
> + }
> + else if(strcmp(cmd,CMD_SET_FPPT)==0) {
> + struct legion_go_wmi_args_2i args = {
> + .arg1 = ARG_FPPT_CUSTOM_MODE,
> + .arg2 = arg1Num,
> + };
> + const struct acpi_buffer in = {
> + .length = sizeof(args),
> + .pointer = &args,
> + };
> +
> + g_Legion_Go_Global.last_call_function = LEGION_GO_FUNC_SET_FPPT;
> +
> + ret = legion_go_wmi_query_integer(g_Legion_Go_Global.legion_device[1],
> + LEGION_GO_WMI_OTHER_SET_FEATURE_VALUE,
> + &in,
> + &prod_id);
> + if (ret == 0) {
> + dev_info(&g_Legion_Go_Global.legion_device[1]->dev,
> + "LEGION GO WMI: SetFPPT result is %d\n", prod_id);
> + }
> + else {
> + dev_warn(&g_Legion_Go_Global.legion_device[1]->dev,
> + "LEGION GO WMI: SetFPPT query failed with err: %d\n", ret);
> + }
> + }
> + else if(strcmp(cmd,CMD_GET_FPPT)==0) {
> + g_Legion_Go_Global.last_call_function = LEGION_GO_FUNC_GET_FPPT;
> + }
> + else if(strcmp(cmd,CMD_SET_SMART_FAN_MODE)==0) {
> + if(arg1Num != 1 && arg1Num != 2 && arg1Num != 3 && arg1Num != 0xFF) {
> + printk(KERN_ERR "LEGION GO WMI: %s arg1 = %s param error!\n",
> + CMD_SET_SMART_FAN_MODE,arg1);
> + return -ENOSPC;
> + }
> +
> + struct legion_go_wmi_args_1i args = {
> + .arg1 = arg1Num,
> + };
> + const struct acpi_buffer in = {
> + .length = sizeof(args),
> + .pointer = &args,
> + };
> + g_Legion_Go_Global.last_call_function = LEGION_GO_FUNC_SET_SMART_FAN_MODE;
> + ret = legion_go_wmi_query_integer(g_Legion_Go_Global.legion_device[0],
> + LEGION_GO_WMI_GAMEZONE_SET_SMARTFANMODE,
> + &in,
> + &prod_id);
> +
> + if (ret == 0) {
> + dev_info(&g_Legion_Go_Global.legion_device[0]->dev,
> + "LEGION GO WMI: SetSmartFanMode query result is %d\n", prod_id);
> + }
> + else {
> + dev_warn(&g_Legion_Go_Global.legion_device[0]->dev,
> + "LEGION GO WMI: SetSmartFanMode query failed with err: %d\n", ret);
> + }
> + }
> + else if(strcmp(cmd,CMD_GET_SMART_FAN_MODE)==0) {
> + g_Legion_Go_Global.last_call_function = LEGION_GO_FUNC_GET_SMART_FAN_MODE;
> + }
> + }
> +
> + return len;
> +}
> +
> +//read other mothod
No new information given by this comment. If you have nothing else to
stay, just comments like this as the function name tells the same
information already.
> +acpi_status acpi_proc_read_other(struct wmi_device *wdev,
> + enum legion_go_wmi_command cmd,
> + struct legion_go_wmi_args_1i* args,
> + char* funciton_name)
function
> +{
> + u32 prod_id = 0;
> + const struct acpi_buffer in = {
> + .length = sizeof(*args),
> + .pointer = args,
> + };
> + acpi_status ret = legion_go_wmi_query_integer(wdev, cmd, &in, &prod_id);
> + if (ret == 0) {
acpi_status ret;
ret = legion_go_wmi_query_integer(wdev, cmd, &in, &prod_id);
if (...) {
> + dev_info(&wdev->dev, "LEGION GO WMI: Integer query result is %d\n", prod_id);
> + snprintf(g_Legion_Go_Global.result_buffer,BUFFER_SIZE,"%s,%u",funciton_name,prod_id);
> + }
> + else {
> + dev_warn(&wdev->dev, "LEGION GO WMI: Integer query failed with err: %d\n", ret);
> + snprintf(g_Legion_Go_Global.result_buffer,BUFFER_SIZE,"%s,error",funciton_name);
> + }
> + return ret;
> +}
> +
> +static ssize_t acpi_proc_read(struct file *filp, char __user *buff, size_t count, loff_t *off)
> +{
> + u32 prod_id;
> + acpi_status ret;
> + int len = strlen(g_Legion_Go_Global.result_buffer);
> +
> + memset(g_Legion_Go_Global.result_buffer,'\0',len);
Is the use of result_buffer race free?
> +
> + if(g_Legion_Go_Global.last_call_function == LEGION_GO_FUNC_NONE) {
Why isn't this inside switch/case?
> + ssize_t result = simple_read_from_buffer(buff,
Define variable separately.
> + count,
> + off,
> + g_Legion_Go_Global.result_buffer,
> + len + 1);
Badly misaligned.
> + return result;
> + //return -EIO;
Remove all commented out code fragments.
> + }
> +
> +
> + switch(g_Legion_Go_Global.last_call_function) {
> + case LEGION_GO_FUNC_SET_SPL:
> + case LEGION_GO_FUNC_GET_SPL:
> + {
> + struct legion_go_wmi_args_1i args = {
> + .arg1 = ARG_SPL_GET_VALUE,
> + };
> + ret = acpi_proc_read_other(g_Legion_Go_Global.legion_device[1],
> + LEGION_GO_WMI_OTHER_GET_FEATURE_VALUE,
> + &args,
> + CMD_GET_SPL);
> +
> + break;
> + }
> + case LEGION_GO_FUNC_SET_SPPT:
> + case LEGION_GO_FUNC_GET_SPPT:
> + {
> + struct legion_go_wmi_args_1i args = {
> + .arg1 = ARG_SPPT_GET_VALUE,
> + };
> + ret = acpi_proc_read_other(g_Legion_Go_Global.legion_device[1],
> + LEGION_GO_WMI_OTHER_GET_FEATURE_VALUE,
> + &args,
> + CMD_GET_SPPT);
> +
> + break;
> + }
> + case LEGION_GO_FUNC_SET_FPPT:
> + case LEGION_GO_FUNC_GET_FPPT:
> + {
> + struct legion_go_wmi_args_1i args = {
> + .arg1 = ARG_FPPT_GET_VALUE,
> + };
> + ret = acpi_proc_read_other(g_Legion_Go_Global.legion_device[1],
> + LEGION_GO_WMI_OTHER_GET_FEATURE_VALUE,
> + &args,
> + CMD_GET_FPPT);
> +
> + break;
> + }
> + case LEGION_GO_FUNC_SET_SMART_FAN_MODE:
> + case LEGION_GO_FUNC_GET_SMART_FAN_MODE:
> + {
> + struct legion_go_wmi_args_1i args = {
> + .arg1 = 255,
> + };
> + const struct acpi_buffer in = {
> + .length = sizeof(args),
> + .pointer = &args,
> + };
> +
> + ret = legion_go_wmi_query_integer(g_Legion_Go_Global.legion_device[0],
> + LEGION_GO_WMI_GAMEZONE_GET_SMARTFANMODE,
> + &in,
> + &prod_id);
> + if (ret == 0) {
> + dev_info(&g_Legion_Go_Global.legion_device[0]->dev,
> + "LEGION GO WMI: Integer query result is %d\n", prod_id);
> + snprintf(g_Legion_Go_Global.result_buffer,BUFFER_SIZE,"%s,%u",
> + CMD_GET_SMART_FAN_MODE,prod_id);
> + }
> + else {
> + dev_warn(&g_Legion_Go_Global.legion_device[0]->dev,
> + "LEGION GO WMI: Integer query failed with err: %d\n", ret);
> + snprintf(g_Legion_Go_Global.result_buffer,BUFFER_SIZE,"%s,error",
> + CMD_GET_SMART_FAN_MODE);
> + }
> + break;
> + }
> + default:
> + {
> + strcpy(g_Legion_Go_Global.result_buffer,"LEGION GO WMI: nothing to write");
> + }
> + }
> +
> + if(g_Legion_Go_Global.first_read == true) {
> + char temp[BUFFER_SIZE] = {'\0'};
> + strcpy(temp, g_Legion_Go_Global.result_buffer);
> + strcpy(g_Legion_Go_Global.result_buffer+1, temp);
> + g_Legion_Go_Global.first_read = false;
> + }
> + // output the current result buffer
> + ssize_t result = simple_read_from_buffer(buff,
> + count,
> + off,
> + g_Legion_Go_Global.result_buffer,
> + len + 1);
> +
> + return result;
In general, you should produce the string only as the last step before
return instead of all the copying you've going on.
> +}
> +
> +static const struct proc_ops proc_acpi_operations = {
> + .proc_read = acpi_proc_read,
> + .proc_write = acpi_proc_write,
> +};
> +
> +static int legion_go_wmi_probe(struct wmi_device *wdev, const void *context)
> +{
> + dev_info(&wdev->dev, "LEGION GO WMI: Probe is starting.\n");
Don't print anything on success.
> + if (!wmi_has_guid(LEGION_GO_WMI_OTHER_GUID)) {
> + dev_warn(&wdev->dev, "LEGION GO WMI: No known OTHER WMI GUID found\n");
> + return -ENODEV;
> + }
> +
> + if (!wmi_has_guid(LEGION_GO_WMI_GAMEZONE_GUID)) {
> + dev_warn(&wdev->dev, "LEGION GO WMI: No known GAMEZONE WMI GUID found\n");
You shouldn't need to add the prefix on every line. Use dev_fmt() instead.
> + return -ENODEV;
> + }
> +
> + if (g_Legion_Go_Global.acpi_entry == NULL) {
> + g_Legion_Go_Global.acpi_entry = proc_create("legion_go_call",
> + 0660,
> + acpi_root_dir,
> + &proc_acpi_operations);
> + }
Perhaps procfs is not right place for what you're trying to do (I'm a
bit loss what exactly because your code is quite hard to follow because
of various style issues and nested layers that seem to serve no real
purpose).
> + if (g_Legion_Go_Global.acpi_entry == NULL)
> + {
> + dev_warn(&wdev->dev, "LEGION GO WMI: Couldn't create procfs entry\n");
> + return -ENOMEM;
> + }
> +
> + dev_info(&wdev->dev, "LEGION GO WMI: procfs entry at /proc/acpi/legion_go_call created.\n");
> +
> + dev_info(&wdev->dev, "LEGION GO WMI: Probe is exiting.\n");
> +
> + if(strcmp(context, LEGION_GO_WMI_GAMEZONE_CONTEXT)== 0) {
> + g_Legion_Go_Global.legion_device[0] = wdev;
> + }
> + else {
> + g_Legion_Go_Global.legion_device[1] = wdev;
> + }
> +
> + return 0;
> +}
> +
> +static void legion_go_wmi_remove(struct wmi_device *wdev)
> +{
> + g_Legion_Go_Global.legion_device[0] = NULL;
> + g_Legion_Go_Global.legion_device[1] = NULL;
> +
> + remove_proc_entry("legion_go_call", acpi_root_dir);
> +
> + dev_info(&wdev->dev, "LEGION GO WMI: procfs entry removed\n");
> +}
> +
> +static struct wmi_driver legion_go_wmi_driver = {
> + .driver = {
> + .name = "legion-go-wmi",
> + },
> + .id_table = legion_go_wmi_id_table,
> + .probe = legion_go_wmi_probe,
> + .remove = legion_go_wmi_remove
> +};
> +
> +module_wmi_driver(legion_go_wmi_driver);
> +
> +MODULE_DEVICE_TABLE(wmi, legion_go_wmi_id_table);
> +
> +MODULE_DESCRIPTION("Lenovo Legion Go WMI Driver");
> +MODULE_AUTHOR("zhixin zhang<zhangzx36@xxxxxxxxxx>");
> +MODULE_LICENSE("GPL");
> +MODULE_VERSION("1.0.0.0");
Drop MODULE_VERSION().
There were many repeated style issues in this submission. Please follow
what is outlined in Documentation/process/coding-style.rst. As somebody
already mentioned, checkpatch can help you find most of such issues but
perhaps not all.
--
i.
