platform/x86: ideapad-laptop: fix checkpatch warnings, more consistent style
authorBarnabás Pőcze <pobrn@protonmail.com>
Wed, 3 Feb 2021 21:56:56 +0000 (21:56 +0000)
committerHans de Goede <hdegoede@redhat.com>
Thu, 4 Feb 2021 09:21:33 +0000 (10:21 +0100)
Fix all checkpatch warnings. Reorder variable definitions from
longest to shortest. Add more whitespaces for better readability.
Rename variables named `ret` to `err` where appropriate. Reorder
sysfs attributes show/store callbacks and the `ideapad_attributes`
array in lexicographic order. And other minor formatting changes.
No significant functional changes are intended.

Signed-off-by: Barnabás Pőcze <pobrn@protonmail.com>
Link: https://lore.kernel.org/r/20210203215403.290792-25-pobrn@protonmail.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
drivers/platform/x86/ideapad-laptop.c

index 4cecf3b..90fb071 100644 (file)
@@ -31,7 +31,7 @@
 
 #include <acpi/video.h>
 
-#define IDEAPAD_RFKILL_DEV_NUM (3)
+#define IDEAPAD_RFKILL_DEV_NUM 3
 
 #if IS_ENABLED(CONFIG_ACPI_WMI)
 static const char *const ideapad_wmi_fnesc_events[] = {
@@ -98,7 +98,7 @@ enum {
 struct ideapad_dytc_priv {
        enum platform_profile_option current_profile;
        struct platform_profile_handler pprof;
-       struct mutex mutex;
+       struct mutex mutex; /* protects the DYTC interface */
        struct ideapad_private *priv;
 };
 
@@ -135,7 +135,7 @@ MODULE_PARM_DESC(no_bt_rfkill, "No rfkill for bluetooth.");
 /*
  * ACPI Helpers
  */
-#define IDEAPAD_EC_TIMEOUT (200) /* in ms */
+#define IDEAPAD_EC_TIMEOUT 200 /* in ms */
 
 static int eval_int(acpi_handle handle, const char *name, unsigned long *res)
 {
@@ -145,7 +145,9 @@ static int eval_int(acpi_handle handle, const char *name, unsigned long *res)
        status = acpi_evaluate_integer(handle, (char *)name, NULL, &result);
        if (ACPI_FAILURE(status))
                return -EIO;
+
        *res = result;
+
        return 0;
 }
 
@@ -224,6 +226,7 @@ static int eval_vpcw(acpi_handle handle, unsigned long cmd, unsigned long data)
        status = acpi_evaluate_object(handle, "VPCW", &params, NULL);
        if (ACPI_FAILURE(status))
                return -EIO;
+
        return 0;
 }
 
@@ -240,13 +243,17 @@ static int read_ec_data(acpi_handle handle, unsigned long cmd, unsigned long *da
 
        while (time_before(jiffies, end_jiffies)) {
                schedule();
+
                err = eval_vpcr(handle, 1, &val);
                if (err)
                        return err;
+
                if (val == 0)
                        return eval_vpcr(handle, 0, data);
        }
+
        acpi_handle_err(handle, "timeout in %s\n", __func__);
+
        return -ETIMEDOUT;
 }
 
@@ -258,6 +265,7 @@ static int write_ec_cmd(acpi_handle handle, unsigned long cmd, unsigned long dat
        err = eval_vpcw(handle, 0, data);
        if (err)
                return err;
+
        err = eval_vpcw(handle, 1, cmd);
        if (err)
                return err;
@@ -266,13 +274,17 @@ static int write_ec_cmd(acpi_handle handle, unsigned long cmd, unsigned long dat
 
        while (time_before(jiffies, end_jiffies)) {
                schedule();
+
                err = eval_vpcr(handle, 1, &val);
                if (err)
                        return err;
+
                if (val == 0)
                        return 0;
        }
+
        acpi_handle_err(handle, "timeout in %s\n", __func__);
+
        return -ETIMEDOUT;
 }
 
@@ -290,6 +302,7 @@ static int debugfs_status_show(struct seq_file *s, void *data)
                seq_printf(s, "Backlight now:  %lu\n", value);
        if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &value))
                seq_printf(s, "BL power value: %s (%lu)\n", value ? "on" : "off", value);
+
        seq_puts(s, "=====================\n");
 
        if (!read_ec_data(priv->adev->handle, VPCCMD_R_RF, &value))
@@ -300,12 +313,14 @@ static int debugfs_status_show(struct seq_file *s, void *data)
                seq_printf(s, "BT status:    %s (%lu)\n", value ? "on" : "off", value);
        if (!read_ec_data(priv->adev->handle, VPCCMD_R_3G, &value))
                seq_printf(s, "3G status:    %s (%lu)\n", value ? "on" : "off", value);
+
        seq_puts(s, "=====================\n");
 
        if (!read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &value))
                seq_printf(s, "Touchpad status: %s (%lu)\n", value ? "on" : "off", value);
        if (!read_ec_data(priv->adev->handle, VPCCMD_R_CAMERA, &value))
                seq_printf(s, "Camera status:   %s (%lu)\n", value ? "on" : "off", value);
+
        seq_puts(s, "=====================\n");
 
        if (!eval_gbmd(priv->adev->handle, &value))
@@ -367,8 +382,8 @@ static void ideapad_debugfs_init(struct ideapad_private *priv)
        dir = debugfs_create_dir("ideapad", NULL);
        priv->debug = dir;
 
-       debugfs_create_file("cfg", S_IRUGO, dir, priv, &debugfs_cfg_fops);
-       debugfs_create_file("status", S_IRUGO, dir, priv, &debugfs_status_fops);
+       debugfs_create_file("cfg", 0444, dir, priv, &debugfs_cfg_fops);
+       debugfs_create_file("status", 0444, dir, priv, &debugfs_status_fops);
 }
 
 static void ideapad_debugfs_exit(struct ideapad_private *priv)
@@ -380,75 +395,79 @@ static void ideapad_debugfs_exit(struct ideapad_private *priv)
 /*
  * sysfs
  */
-static ssize_t show_ideapad_cam(struct device *dev,
-                               struct device_attribute *attr,
-                               char *buf)
+static ssize_t camera_power_show(struct device *dev,
+                                struct device_attribute *attr,
+                                char *buf)
 {
-       unsigned long result;
        struct ideapad_private *priv = dev_get_drvdata(dev);
+       unsigned long result;
        int err;
 
        err = read_ec_data(priv->adev->handle, VPCCMD_R_CAMERA, &result);
        if (err)
                return err;
+
        return sysfs_emit(buf, "%d\n", !!result);
 }
 
-static ssize_t store_ideapad_cam(struct device *dev,
-                                struct device_attribute *attr,
-                                const char *buf, size_t count)
+static ssize_t camera_power_store(struct device *dev,
+                                 struct device_attribute *attr,
+                                 const char *buf, size_t count)
 {
        struct ideapad_private *priv = dev_get_drvdata(dev);
        bool state;
-       int ret;
-
-       ret = kstrtobool(buf, &state);
-       if (ret)
-               return ret;
-       ret = write_ec_cmd(priv->adev->handle, VPCCMD_W_CAMERA, state);
-       if (ret)
-               return ret;
+       int err;
+
+       err = kstrtobool(buf, &state);
+       if (err)
+               return err;
+
+       err = write_ec_cmd(priv->adev->handle, VPCCMD_W_CAMERA, state);
+       if (err)
+               return err;
+
        return count;
 }
 
-static DEVICE_ATTR(camera_power, 0644, show_ideapad_cam, store_ideapad_cam);
+static DEVICE_ATTR_RW(camera_power);
 
-static ssize_t show_ideapad_fan(struct device *dev,
-                               struct device_attribute *attr,
-                               char *buf)
+static ssize_t conservation_mode_show(struct device *dev,
+                                     struct device_attribute *attr,
+                                     char *buf)
 {
-       unsigned long result;
        struct ideapad_private *priv = dev_get_drvdata(dev);
+       unsigned long result;
        int err;
 
-       err = read_ec_data(priv->adev->handle, VPCCMD_R_FAN, &result);
+       err = eval_gbmd(priv->adev->handle, &result);
        if (err)
                return err;
-       return sysfs_emit(buf, "%lu\n", result);
+
+       return sysfs_emit(buf, "%d\n", !!test_bit(GBMD_CONSERVATION_STATE_BIT, &result));
 }
 
-static ssize_t store_ideapad_fan(struct device *dev,
-                                struct device_attribute *attr,
-                                const char *buf, size_t count)
+static ssize_t conservation_mode_store(struct device *dev,
+                                      struct device_attribute *attr,
+                                      const char *buf, size_t count)
 {
        struct ideapad_private *priv = dev_get_drvdata(dev);
-       unsigned int state;
-       int ret;
+       bool state;
+       int err;
+
+       err = kstrtobool(buf, &state);
+       if (err)
+               return err;
+
+       err = exec_smbc(priv->adev->handle, state ? SMBC_CONSERVATION_ON : SMBC_CONSERVATION_OFF);
+       if (err)
+               return err;
 
-       ret = kstrtouint(buf, 0, &state);
-       if (ret)
-               return ret;
-       if (state > 4 || state == 3)
-               return -EINVAL;
-       ret = write_ec_cmd(priv->adev->handle, VPCCMD_W_FAN, state);
-       if (ret)
-               return ret;
        return count;
 }
 
-static DEVICE_ATTR(fan_mode, 0644, show_ideapad_fan, store_ideapad_fan);
+static DEVICE_ATTR_RW(conservation_mode);
 
-static ssize_t touchpad_show(struct device *dev,
+static ssize_t fan_mode_show(struct device *dev,
                             struct device_attribute *attr,
                             char *buf)
 {
@@ -456,113 +475,121 @@ static ssize_t touchpad_show(struct device *dev,
        unsigned long result;
        int err;
 
-       err = read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &result);
+       err = read_ec_data(priv->adev->handle, VPCCMD_R_FAN, &result);
        if (err)
                return err;
-       return sysfs_emit(buf, "%d\n", !!result);
+
+       return sysfs_emit(buf, "%lu\n", result);
 }
 
-static ssize_t touchpad_store(struct device *dev,
+static ssize_t fan_mode_store(struct device *dev,
                              struct device_attribute *attr,
                              const char *buf, size_t count)
 {
        struct ideapad_private *priv = dev_get_drvdata(dev);
-       bool state;
-       int ret;
+       unsigned int state;
+       int err;
+
+       err = kstrtouint(buf, 0, &state);
+       if (err)
+               return err;
+
+       if (state > 4 || state == 3)
+               return -EINVAL;
 
-       ret = kstrtobool(buf, &state);
-       if (ret)
-               return ret;
+       err = write_ec_cmd(priv->adev->handle, VPCCMD_W_FAN, state);
+       if (err)
+               return err;
 
-       ret = write_ec_cmd(priv->adev->handle, VPCCMD_W_TOUCHPAD, state);
-       if (ret)
-               return ret;
        return count;
 }
 
-static DEVICE_ATTR_RW(touchpad);
+static DEVICE_ATTR_RW(fan_mode);
 
-static ssize_t conservation_mode_show(struct device *dev,
-                               struct device_attribute *attr,
-                               char *buf)
+static ssize_t fn_lock_show(struct device *dev,
+                           struct device_attribute *attr,
+                           char *buf)
 {
        struct ideapad_private *priv = dev_get_drvdata(dev);
-       unsigned long result;
+       unsigned long hals;
        int err;
 
-       err = eval_gbmd(priv->adev->handle, &result);
+       err = eval_hals(priv->adev->handle, &hals);
        if (err)
                return err;
-       return sysfs_emit(buf, "%d\n", !!test_bit(GBMD_CONSERVATION_STATE_BIT, &result));
+
+       return sysfs_emit(buf, "%d\n", !!test_bit(HALS_FNLOCK_STATE_BIT, &hals));
 }
 
-static ssize_t conservation_mode_store(struct device *dev,
-                                struct device_attribute *attr,
-                                const char *buf, size_t count)
+static ssize_t fn_lock_store(struct device *dev,
+                            struct device_attribute *attr,
+                            const char *buf, size_t count)
 {
        struct ideapad_private *priv = dev_get_drvdata(dev);
        bool state;
-       int ret;
+       int err;
 
-       ret = kstrtobool(buf, &state);
-       if (ret)
-               return ret;
+       err = kstrtobool(buf, &state);
+       if (err)
+               return err;
+
+       err = exec_sals(priv->adev->handle, state ? SALS_FNLOCK_ON : SALS_FNLOCK_OFF);
+       if (err)
+               return err;
 
-       ret = exec_smbc(priv->adev->handle, state ? SMBC_CONSERVATION_ON : SMBC_CONSERVATION_OFF);
-       if (ret)
-               return ret;
        return count;
 }
 
-static DEVICE_ATTR_RW(conservation_mode);
+static DEVICE_ATTR_RW(fn_lock);
 
-static ssize_t fn_lock_show(struct device *dev,
-                           struct device_attribute *attr,
-                           char *buf)
+static ssize_t touchpad_show(struct device *dev,
+                            struct device_attribute *attr,
+                            char *buf)
 {
        struct ideapad_private *priv = dev_get_drvdata(dev);
-       unsigned long hals;
-       int fail = eval_hals(priv->adev->handle, &hals);
+       unsigned long result;
+       int err;
 
-       if (fail)
-               return fail;
+       err = read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &result);
+       if (err)
+               return err;
 
-       return sysfs_emit(buf, "%d\n", !!test_bit(HALS_FNLOCK_STATE_BIT, &hals));
+       return sysfs_emit(buf, "%d\n", !!result);
 }
 
-static ssize_t fn_lock_store(struct device *dev,
-                            struct device_attribute *attr,
-                            const char *buf, size_t count)
+static ssize_t touchpad_store(struct device *dev,
+                             struct device_attribute *attr,
+                             const char *buf, size_t count)
 {
        struct ideapad_private *priv = dev_get_drvdata(dev);
        bool state;
-       int ret;
+       int err;
+
+       err = kstrtobool(buf, &state);
+       if (err)
+               return err;
 
-       ret = kstrtobool(buf, &state);
-       if (ret)
-               return ret;
+       err = write_ec_cmd(priv->adev->handle, VPCCMD_W_TOUCHPAD, state);
+       if (err)
+               return err;
 
-       ret = exec_sals(priv->adev->handle, state ? SALS_FNLOCK_ON : SALS_FNLOCK_OFF);
-       if (ret)
-               return ret;
        return count;
 }
 
-static DEVICE_ATTR_RW(fn_lock);
-
+static DEVICE_ATTR_RW(touchpad);
 
 static struct attribute *ideapad_attributes[] = {
        &dev_attr_camera_power.attr,
-       &dev_attr_fan_mode.attr,
-       &dev_attr_touchpad.attr,
        &dev_attr_conservation_mode.attr,
+       &dev_attr_fan_mode.attr,
        &dev_attr_fn_lock.attr,
+       &dev_attr_touchpad.attr,
        NULL
 };
 
 static umode_t ideapad_is_visible(struct kobject *kobj,
-                                struct attribute *attr,
-                                int idx)
+                                 struct attribute *attr,
+                                 int idx)
 {
        struct device *dev = kobj_to_dev(kobj);
        struct ideapad_private *priv = dev_get_drvdata(dev);
@@ -639,6 +666,7 @@ static int convert_dytc_to_profile(int dytcmode, enum platform_profile_option *p
        default: /* Unknown mode */
                return -EINVAL;
        }
+
        return 0;
 }
 
@@ -657,6 +685,7 @@ static int convert_profile_to_dytc(enum platform_profile_option profile, int *pe
        default: /* Unknown profile */
                return -EOPNOTSUPP;
        }
+
        return 0;
 }
 
@@ -664,24 +693,24 @@ static int convert_profile_to_dytc(enum platform_profile_option profile, int *pe
  * dytc_profile_get: Function to register with platform_profile
  * handler. Returns current platform profile.
  */
-int dytc_profile_get(struct platform_profile_handler *pprof,
-                       enum platform_profile_option *profile)
+static int dytc_profile_get(struct platform_profile_handler *pprof,
+                           enum platform_profile_option *profile)
 {
-       struct ideapad_dytc_priv *dytc;
+       struct ideapad_dytc_priv *dytc = container_of(pprof, struct ideapad_dytc_priv, pprof);
 
-       dytc = container_of(pprof, struct ideapad_dytc_priv, pprof);
        *profile = dytc->current_profile;
        return 0;
 }
 
 /*
  * Helper function - check if we are in CQL mode and if we are
- *  -  disable CQL,
+ *  - disable CQL,
  *  - run the command
  *  - enable CQL
  *  If not in CQL mode, just run the command
  */
-int dytc_cql_command(struct ideapad_private *priv, unsigned long cmd, unsigned long *output)
+static int dytc_cql_command(struct ideapad_private *priv, unsigned long cmd,
+                           unsigned long *output)
 {
        int err, cmd_err, cur_funcmode;
 
@@ -717,16 +746,13 @@ int dytc_cql_command(struct ideapad_private *priv, unsigned long cmd, unsigned l
  * dytc_profile_set: Function to register with platform_profile
  * handler. Sets current platform profile.
  */
-int dytc_profile_set(struct platform_profile_handler *pprof,
-                       enum platform_profile_option profile)
+static int dytc_profile_set(struct platform_profile_handler *pprof,
+                           enum platform_profile_option profile)
 {
-       struct ideapad_dytc_priv *dytc;
-       struct ideapad_private *priv;
+       struct ideapad_dytc_priv *dytc = container_of(pprof, struct ideapad_dytc_priv, pprof);
+       struct ideapad_private *priv = dytc->priv;
        int err;
 
-       dytc = container_of(pprof, struct ideapad_dytc_priv, pprof);
-       priv = dytc->priv;
-
        err = mutex_lock_interruptible(&dytc->mutex);
        if (err)
                return err;
@@ -744,16 +770,18 @@ int dytc_profile_set(struct platform_profile_handler *pprof,
                        goto unlock;
 
                /* Determine if we are in CQL mode. This alters the commands we do */
-               err = dytc_cql_command(priv,
-                               DYTC_SET_COMMAND(DYTC_FUNCTION_MMC, perfmode, 1),
-                               NULL);
+               err = dytc_cql_command(priv, DYTC_SET_COMMAND(DYTC_FUNCTION_MMC, perfmode, 1),
+                                      NULL);
                if (err)
                        goto unlock;
        }
+
        /* Success - update current profile */
        dytc->current_profile = profile;
+
 unlock:
        mutex_unlock(&dytc->mutex);
+
        return err;
 }
 
@@ -770,7 +798,10 @@ static void dytc_profile_refresh(struct ideapad_private *priv)
                return;
 
        perfmode = (output >> DYTC_GET_MODE_BIT) & 0xF;
-       convert_dytc_to_profile(perfmode, &profile);
+
+       if (convert_dytc_to_profile(perfmode, &profile))
+               return;
+
        if (profile != priv->dytc->current_profile) {
                priv->dytc->current_profile = profile;
                platform_profile_notify();
@@ -791,14 +822,14 @@ static int ideapad_dytc_profile_init(struct ideapad_private *priv)
                return err;
 
        /* Check DYTC is enabled and supports mode setting */
-       if (!(output & BIT(DYTC_QUERY_ENABLE_BIT)))
+       if (!test_bit(DYTC_QUERY_ENABLE_BIT, &output))
                return -ENODEV;
 
        dytc_version = (output >> DYTC_QUERY_REV_BIT) & 0xF;
        if (dytc_version < 5)
                return -ENODEV;
 
-       priv->dytc = kzalloc(sizeof(struct ideapad_dytc_priv), GFP_KERNEL);
+       priv->dytc = kzalloc(sizeof(*priv->dytc), GFP_KERNEL);
        if (!priv->dytc)
                return -ENOMEM;
 
@@ -816,17 +847,18 @@ static int ideapad_dytc_profile_init(struct ideapad_private *priv)
        /* Create platform_profile structure and register */
        err = platform_profile_register(&priv->dytc->pprof);
        if (err)
-               goto mutex_destroy;
+               goto pp_reg_failed;
 
        /* Ensure initial values are correct */
        dytc_profile_refresh(priv);
 
        return 0;
 
-mutex_destroy:
+pp_reg_failed:
        mutex_destroy(&priv->dytc->mutex);
        kfree(priv->dytc);
        priv->dytc = NULL;
+
        return err;
 }
 
@@ -838,6 +870,7 @@ static void ideapad_dytc_profile_exit(struct ideapad_private *priv)
        platform_profile_remove();
        mutex_destroy(&priv->dytc->mutex);
        kfree(priv->dytc);
+
        priv->dytc = NULL;
 }
 
@@ -887,16 +920,15 @@ static void ideapad_sync_rfk_state(struct ideapad_private *priv)
 
 static int ideapad_register_rfkill(struct ideapad_private *priv, int dev)
 {
-       int ret;
-       unsigned long sw_blocked;
+       unsigned long rf_enabled;
+       int err;
 
-       if (no_bt_rfkill &&
-           (ideapad_rfk_data[dev].type == RFKILL_TYPE_BLUETOOTH)) {
+       if (no_bt_rfkill && ideapad_rfk_data[dev].type == RFKILL_TYPE_BLUETOOTH) {
                /* Force to enable bluetooth when no_bt_rfkill=1 */
-               write_ec_cmd(priv->adev->handle,
-                            ideapad_rfk_data[dev].opcode, 1);
+               write_ec_cmd(priv->adev->handle, ideapad_rfk_data[dev].opcode, 1);
                return 0;
        }
+
        priv->rfk_priv[dev].dev = dev;
        priv->rfk_priv[dev].priv = priv;
 
@@ -908,20 +940,17 @@ static int ideapad_register_rfkill(struct ideapad_private *priv, int dev)
        if (!priv->rfk[dev])
                return -ENOMEM;
 
-       if (read_ec_data(priv->adev->handle, ideapad_rfk_data[dev].opcode-1,
-                        &sw_blocked)) {
-               rfkill_init_sw_state(priv->rfk[dev], 0);
-       } else {
-               sw_blocked = !sw_blocked;
-               rfkill_init_sw_state(priv->rfk[dev], sw_blocked);
-       }
+       err = read_ec_data(priv->adev->handle, ideapad_rfk_data[dev].opcode - 1, &rf_enabled);
+       if (err)
+               rf_enabled = 1;
+
+       rfkill_init_sw_state(priv->rfk[dev], !rf_enabled);
 
-       ret = rfkill_register(priv->rfk[dev]);
-       if (ret) {
+       err = rfkill_register(priv->rfk[dev]);
+       if (err)
                rfkill_destroy(priv->rfk[dev]);
-               return ret;
-       }
-       return 0;
+
+       return err;
 }
 
 static void ideapad_unregister_rfkill(struct ideapad_private *priv, int dev)
@@ -952,26 +981,25 @@ static void ideapad_sysfs_exit(struct ideapad_private *priv)
  * input device
  */
 static const struct key_entry ideapad_keymap[] = {
-       { KE_KEY, 6,  { KEY_SWITCHVIDEOMODE } },
-       { KE_KEY, 7,  { KEY_CAMERA } },
-       { KE_KEY, 8,  { KEY_MICMUTE } },
-       { KE_KEY, 11, { KEY_F16 } },
-       { KE_KEY, 13, { KEY_WLAN } },
-       { KE_KEY, 16, { KEY_PROG1 } },
-       { KE_KEY, 17, { KEY_PROG2 } },
-       { KE_KEY, 64, { KEY_PROG3 } },
-       { KE_KEY, 65, { KEY_PROG4 } },
-       { KE_KEY, 66, { KEY_TOUCHPAD_OFF } },
-       { KE_KEY, 67, { KEY_TOUCHPAD_ON } },
+       { KE_KEY,   6, { KEY_SWITCHVIDEOMODE } },
+       { KE_KEY,   7, { KEY_CAMERA } },
+       { KE_KEY,   8, { KEY_MICMUTE } },
+       { KE_KEY,  11, { KEY_F16 } },
+       { KE_KEY,  13, { KEY_WLAN } },
+       { KE_KEY,  16, { KEY_PROG1 } },
+       { KE_KEY,  17, { KEY_PROG2 } },
+       { KE_KEY,  64, { KEY_PROG3 } },
+       { KE_KEY,  65, { KEY_PROG4 } },
+       { KE_KEY,  66, { KEY_TOUCHPAD_OFF } },
+       { KE_KEY,  67, { KEY_TOUCHPAD_ON } },
        { KE_KEY, 128, { KEY_ESC } },
-
-       { KE_END, 0 },
+       { KE_END },
 };
 
 static int ideapad_input_init(struct ideapad_private *priv)
 {
        struct input_dev *inputdev;
-       int error;
+       int err;
 
        inputdev = input_allocate_device();
        if (!inputdev)
@@ -982,26 +1010,28 @@ static int ideapad_input_init(struct ideapad_private *priv)
        inputdev->id.bustype = BUS_HOST;
        inputdev->dev.parent = &priv->platform_device->dev;
 
-       error = sparse_keymap_setup(inputdev, ideapad_keymap, NULL);
-       if (error) {
+       err = sparse_keymap_setup(inputdev, ideapad_keymap, NULL);
+       if (err) {
                dev_err(&priv->platform_device->dev,
-                       "Unable to setup input device keymap\n");
+                       "Could not set up input device keymap: %d\n", err);
                goto err_free_dev;
        }
 
-       error = input_register_device(inputdev);
-       if (error) {
+       err = input_register_device(inputdev);
+       if (err) {
                dev_err(&priv->platform_device->dev,
-                       "Unable to register input device\n");
+                       "Could not register input device: %d\n", err);
                goto err_free_dev;
        }
 
        priv->inputdev = inputdev;
+
        return 0;
 
 err_free_dev:
        input_free_device(inputdev);
-       return error;
+
+       return err;
 }
 
 static void ideapad_input_exit(struct ideapad_private *priv)
@@ -1022,6 +1052,7 @@ static void ideapad_input_novokey(struct ideapad_private *priv)
 
        if (read_ec_data(priv->adev->handle, VPCCMD_R_NOVO, &long_pressed))
                return;
+
        if (long_pressed)
                ideapad_input_report(priv, 17);
        else
@@ -1037,8 +1068,8 @@ static void ideapad_check_special_buttons(struct ideapad_private *priv)
 
        for_each_set_bit (bit, &value, 16) {
                switch (bit) {
-               case 0: /* Z580 */
                case 6: /* Z570 */
+               case 0: /* Z580 */
                        /* Thermal Management button */
                        ideapad_input_report(priv, 65);
                        break;
@@ -1066,6 +1097,7 @@ static int ideapad_backlight_get_brightness(struct backlight_device *blightdev)
        err = read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now);
        if (err)
                return err;
+
        return now;
 }
 
@@ -1078,6 +1110,7 @@ static int ideapad_backlight_update_status(struct backlight_device *blightdev)
                           blightdev->props.brightness);
        if (err)
                return err;
+
        err = write_ec_cmd(priv->adev->handle, VPCCMD_W_BL_POWER,
                           blightdev->props.power != FB_BLANK_POWERDOWN);
        if (err)
@@ -1101,30 +1134,36 @@ static int ideapad_backlight_init(struct ideapad_private *priv)
        err = read_ec_data(priv->adev->handle, VPCCMD_R_BL_MAX, &max);
        if (err)
                return err;
+
        err = read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now);
        if (err)
                return err;
+
        err = read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &power);
        if (err)
                return err;
 
-       memset(&props, 0, sizeof(struct backlight_properties));
+       memset(&props, 0, sizeof(props));
+
        props.max_brightness = max;
        props.type = BACKLIGHT_PLATFORM;
+
        blightdev = backlight_device_register("ideapad",
                                              &priv->platform_device->dev,
                                              priv,
                                              &ideapad_backlight_ops,
                                              &props);
        if (IS_ERR(blightdev)) {
+               err = PTR_ERR(blightdev);
                dev_err(&priv->platform_device->dev,
-                       "Could not register backlight device\n");
-               return PTR_ERR(blightdev);
+                       "Could not register backlight device: %d\n", err);
+               return err;
        }
 
        priv->blightdev = blightdev;
        blightdev->props.brightness = now;
        blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
+
        backlight_update_status(blightdev);
 
        return 0;
@@ -1138,13 +1177,15 @@ static void ideapad_backlight_exit(struct ideapad_private *priv)
 
 static void ideapad_backlight_notify_power(struct ideapad_private *priv)
 {
-       unsigned long power;
        struct backlight_device *blightdev = priv->blightdev;
+       unsigned long power;
 
        if (!blightdev)
                return;
+
        if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &power))
                return;
+
        blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
 }
 
@@ -1153,12 +1194,10 @@ static void ideapad_backlight_notify_brightness(struct ideapad_private *priv)
        unsigned long now;
 
        /* if we control brightness via acpi video driver */
-       if (priv->blightdev == NULL) {
+       if (!priv->blightdev)
                read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now);
-               return;
-       }
-
-       backlight_force_update(priv->blightdev, BACKLIGHT_UPDATE_HOTKEY);
+       else
+               backlight_force_update(priv->blightdev, BACKLIGHT_UPDATE_HOTKEY);
 }
 
 /*
@@ -1173,13 +1212,14 @@ static void ideapad_sync_touchpad_state(struct ideapad_private *priv)
 
        /* Without reading from EC touchpad LED doesn't switch state */
        if (!read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &value)) {
-               /* Some IdeaPads don't really turn off touchpad - they only
+               unsigned char param;
+               /*
+                * Some IdeaPads don't really turn off touchpad - they only
                 * switch the LED state. We (de)activate KBC AUX port to turn
                 * touchpad off and on. We send KEY_TOUCHPAD_OFF and
-                * KEY_TOUCHPAD_ON to not to get out of sync with LED */
-               unsigned char param;
-               i8042_command(&param, value ? I8042_CMD_AUX_ENABLE :
-                             I8042_CMD_AUX_DISABLE);
+                * KEY_TOUCHPAD_ON to not to get out of sync with LED
+                */
+               i8042_command(&param, value ? I8042_CMD_AUX_ENABLE : I8042_CMD_AUX_DISABLE);
                ideapad_input_report(priv, value ? 67 : 66);
        }
 }
@@ -1191,6 +1231,7 @@ static void ideapad_acpi_notify(acpi_handle handle, u32 event, void *data)
 
        if (read_ec_data(handle, VPCCMD_R_VPC1, &vpc1))
                return;
+
        if (read_ec_data(handle, VPCCMD_R_VPC2, &vpc2))
                return;
 
@@ -1198,9 +1239,6 @@ static void ideapad_acpi_notify(acpi_handle handle, u32 event, void *data)
 
        for_each_set_bit (bit, &vpc1, 16) {
                switch (bit) {
-               case 9:
-                       ideapad_sync_rfk_state(priv);
-                       break;
                case 13:
                case 11:
                case 8:
@@ -1208,6 +1246,9 @@ static void ideapad_acpi_notify(acpi_handle handle, u32 event, void *data)
                case 6:
                        ideapad_input_report(priv, bit);
                        break;
+               case 9:
+                       ideapad_sync_rfk_state(priv);
+                       break;
                case 5:
                        ideapad_sync_touchpad_state(priv);
                        break;
@@ -1220,16 +1261,17 @@ static void ideapad_acpi_notify(acpi_handle handle, u32 event, void *data)
                case 2:
                        ideapad_backlight_notify_power(priv);
                        break;
-               case 0:
-                       ideapad_check_special_buttons(priv);
-                       break;
                case 1:
-                       /* Some IdeaPads report event 1 every ~20
+                       /*
+                        * Some IdeaPads report event 1 every ~20
                         * seconds while on battery power; some
                         * report this when changing to/from tablet
                         * mode. Squelch this event.
                         */
                        break;
+               case 0:
+                       ideapad_check_special_buttons(priv);
+                       break;
                default:
                        dev_info(&priv->platform_device->dev,
                                 "Unknown event: %lu\n", bit);
@@ -1301,14 +1343,14 @@ static void ideapad_check_features(struct ideapad_private *priv)
 
 static int ideapad_acpi_add(struct platform_device *pdev)
 {
-       int ret, i;
        struct ideapad_private *priv;
        struct acpi_device *adev;
        acpi_status status;
        unsigned long cfg;
+       int err, i;
 
-       ret = acpi_bus_get_device(ACPI_HANDLE(&pdev->dev), &adev);
-       if (ret)
+       err = acpi_bus_get_device(ACPI_HANDLE(&pdev->dev), &adev);
+       if (err)
                return -ENODEV;
 
        if (eval_int(adev->handle, "_CFG", &cfg))
@@ -1319,20 +1361,21 @@ static int ideapad_acpi_add(struct platform_device *pdev)
                return -ENOMEM;
 
        dev_set_drvdata(&pdev->dev, priv);
+
        priv->cfg = cfg;
        priv->adev = adev;
        priv->platform_device = pdev;
 
        ideapad_check_features(priv);
 
-       ret = ideapad_sysfs_init(priv);
-       if (ret)
-               return ret;
+       err = ideapad_sysfs_init(priv);
+       if (err)
+               return err;
 
        ideapad_debugfs_init(priv);
 
-       ret = ideapad_input_init(priv);
-       if (ret)
+       err = ideapad_input_init(priv);
+       if (err)
                goto input_failed;
 
        /*
@@ -1353,24 +1396,25 @@ static int ideapad_acpi_add(struct platform_device *pdev)
        ideapad_sync_rfk_state(priv);
        ideapad_sync_touchpad_state(priv);
 
-       ret = ideapad_dytc_profile_init(priv);
-       if (ret) {
-               if (ret != -ENODEV)
-                       dev_warn(&pdev->dev, "Could not set up DYTC interface: %d\n", ret);
+       err = ideapad_dytc_profile_init(priv);
+       if (err) {
+               if (err != -ENODEV)
+                       dev_warn(&pdev->dev, "Could not set up DYTC interface: %d\n", err);
                else
                        dev_info(&pdev->dev, "DYTC interface is not available\n");
        }
 
        if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
-               ret = ideapad_backlight_init(priv);
-               if (ret && ret != -ENODEV)
+               err = ideapad_backlight_init(priv);
+               if (err && err != -ENODEV)
                        goto backlight_failed;
        }
+
        status = acpi_install_notify_handler(adev->handle,
                                             ACPI_DEVICE_NOTIFY,
                                             ideapad_acpi_notify, priv);
        if (ACPI_FAILURE(status)) {
-               ret = -EIO;
+               err = -EIO;
                goto notification_failed;
        }
 
@@ -1383,29 +1427,38 @@ static int ideapad_acpi_add(struct platform_device *pdev)
                        break;
                }
        }
+
        if (ACPI_FAILURE(status) && status != AE_NOT_EXIST) {
-               ret = -EIO;
+               err = -EIO;
                goto notification_failed_wmi;
        }
 #endif
 
        return 0;
+
 #if IS_ENABLED(CONFIG_ACPI_WMI)
 notification_failed_wmi:
        acpi_remove_notify_handler(priv->adev->handle,
-               ACPI_DEVICE_NOTIFY, ideapad_acpi_notify);
+                                  ACPI_DEVICE_NOTIFY,
+                                  ideapad_acpi_notify);
 #endif
+
 notification_failed:
        ideapad_backlight_exit(priv);
+
 backlight_failed:
        ideapad_dytc_profile_exit(priv);
+
        for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
                ideapad_unregister_rfkill(priv, i);
+
        ideapad_input_exit(priv);
+
 input_failed:
        ideapad_debugfs_exit(priv);
        ideapad_sysfs_exit(priv);
-       return ret;
+
+       return err;
 }
 
 static int ideapad_acpi_remove(struct platform_device *pdev)
@@ -1417,12 +1470,17 @@ static int ideapad_acpi_remove(struct platform_device *pdev)
        if (priv->fnesc_guid)
                wmi_remove_notify_handler(priv->fnesc_guid);
 #endif
+
        acpi_remove_notify_handler(priv->adev->handle,
-               ACPI_DEVICE_NOTIFY, ideapad_acpi_notify);
+                                  ACPI_DEVICE_NOTIFY,
+                                  ideapad_acpi_notify);
+
        ideapad_backlight_exit(priv);
        ideapad_dytc_profile_exit(priv);
+
        for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
                ideapad_unregister_rfkill(priv, i);
+
        ideapad_input_exit(priv);
        ideapad_debugfs_exit(priv);
        ideapad_sysfs_exit(priv);
@@ -1447,8 +1505,8 @@ static int ideapad_acpi_resume(struct device *dev)
 static SIMPLE_DEV_PM_OPS(ideapad_pm, NULL, ideapad_acpi_resume);
 
 static const struct acpi_device_id ideapad_device_ids[] = {
-       { "VPC2004", 0},
-       { "", 0},
+       {"VPC2004", 0},
+       {"", 0},
 };
 MODULE_DEVICE_TABLE(acpi, ideapad_device_ids);