From c7e1c782f2432cd4dc6c6ea930d99d93997a0edb Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Sun, 21 Nov 2021 20:11:24 +0100
Subject: [PATCH] platform/x86: thinkpad_acpi: Make *_init() functions return -ENODEV instead of 1
Git-commit: c7e1c782f2432cd4dc6c6ea930d99d93997a0edb
Patch-mainline: v5.17-rc1
References: bsc#1210050
Make ibm_init_struct.init() callbacks return -ENODEV instead of 1 when
the subdevice / function is not available.
Using -ENODEV clearly states what it going on where as a magic return of
"1" requires a deep dive into the code to figure out what is going on.
This also allows for some cleanups, avoiding the need to translate an
-ENODEV return into "return 1" (which often mistakenly was "return 0").
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Tested-by: Mark Pearson <mpearson@lenovo.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211121191129.256713-3-hdegoede@redhat.com
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/platform/x86/thinkpad_acpi.c | 85 +++++++++++-----------------
1 file changed, 34 insertions(+), 51 deletions(-)
diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index 9e296b436bea..c5613399453a 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -3377,7 +3377,7 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
str_supported(tp_features.hotkey));
if (!tp_features.hotkey)
- return 1;
+ return -ENODEV;
quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
ARRAY_SIZE(tpacpi_hotkey_qtable));
@@ -3584,7 +3584,7 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
return 0;
err_exit:
- return (res < 0) ? res : 1;
+ return (res < 0) ? res : -ENODEV;
}
/* Thinkpad X1 Carbon support 5 modes including Home mode, Web browser
@@ -4451,7 +4451,7 @@ static int __init bluetooth_init(struct ibm_init_struct *iibm)
}
if (!tp_features.bluetooth)
- return 1;
+ return -ENODEV;
res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
&bluetooth_tprfk_ops,
@@ -4631,7 +4631,7 @@ static int __init wan_init(struct ibm_init_struct *iibm)
}
if (!tp_features.wan)
- return 1;
+ return -ENODEV;
res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
&wan_tprfk_ops,
@@ -4760,7 +4760,7 @@ static int __init uwb_init(struct ibm_init_struct *iibm)
}
if (!tp_features.uwb)
- return 1;
+ return -ENODEV;
res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
&uwb_tprfk_ops,
@@ -4853,7 +4853,7 @@ static int __init video_init(struct ibm_init_struct *iibm)
str_supported(video_supported != TPACPI_VIDEO_NONE),
video_supported);
- return (video_supported != TPACPI_VIDEO_NONE) ? 0 : 1;
+ return (video_supported != TPACPI_VIDEO_NONE) ? 0 : -ENODEV;
}
static void video_exit(void)
@@ -5261,7 +5261,7 @@ static int __init kbdlight_init(struct ibm_init_struct *iibm)
if (!kbdlight_is_supported()) {
tp_features.kbdlight = 0;
vdbg_printk(TPACPI_DBG_INIT, "kbdlight is unsupported\n");
- return 1;
+ return -ENODEV;
}
kbdlight_brightness = kbdlight_sysfs_get(NULL);
@@ -5451,7 +5451,7 @@ static int __init light_init(struct ibm_init_struct *iibm)
str_supported(tp_features.light_status));
if (!tp_features.light)
- return 1;
+ return -ENODEV;
rc = led_classdev_register(&tpacpi_pdev->dev,
&tpacpi_led_thinklight.led_classdev);
@@ -5567,7 +5567,7 @@ static int __init cmos_init(struct ibm_init_struct *iibm)
vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
str_supported(cmos_handle != NULL));
- return cmos_handle ? 0 : 1;
+ return cmos_handle ? 0 : -ENODEV;
}
static int cmos_read(struct seq_file *m)
@@ -5912,7 +5912,7 @@ static int __init led_init(struct ibm_init_struct *iibm)
str_supported(led_supported), led_supported);
if (led_supported == TPACPI_LED_NONE)
- return 1;
+ return -ENODEV;
tpacpi_leds = kcalloc(TPACPI_LED_NUMLEDS, sizeof(*tpacpi_leds),
GFP_KERNEL);
@@ -6041,7 +6041,7 @@ static int __init beep_init(struct ibm_init_struct *iibm)
tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
- return (beep_handle) ? 0 : 1;
+ return (beep_handle) ? 0 : -ENODEV;
}
static int beep_read(struct seq_file *m)
@@ -6425,7 +6425,7 @@ static int __init thermal_init(struct ibm_init_struct *iibm)
str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
thermal_read_mode);
- return thermal_read_mode == TPACPI_THERMAL_NONE ? 1 : 0;
+ return thermal_read_mode != TPACPI_THERMAL_NONE ? 0 : -ENODEV;
}
static int thermal_read(struct seq_file *m)
@@ -6836,25 +6836,25 @@ static int __init brightness_init(struct ibm_init_struct *iibm)
/* if it is unknown, we don't handle it: it wouldn't be safe */
if (tp_features.bright_unkfw)
- return 1;
+ return -ENODEV;
if (!brightness_enable) {
dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
"brightness support disabled by module parameter\n");
- return 1;
+ return -ENODEV;
}
if (acpi_video_get_backlight_type() != acpi_backlight_vendor) {
if (brightness_enable > 1) {
pr_info("Standard ACPI backlight interface available, not loading native one\n");
- return 1;
+ return -ENODEV;
} else if (brightness_enable == 1) {
pr_warn("Cannot enable backlight brightness support, ACPI is already handling it. Refer to the acpi_backlight kernel parameter.\n");
- return 1;
+ return -ENODEV;
}
} else if (!tp_features.bright_acpimode) {
pr_notice("ACPI backlight interface not available\n");
- return 1;
+ return -ENODEV;
}
pr_notice("ACPI native brightness control enabled\n");
@@ -6887,7 +6887,7 @@ static int __init brightness_init(struct ibm_init_struct *iibm)
return -EINVAL;
if (tpacpi_brightness_get_raw(&b) < 0)
- return 1;
+ return -ENODEV;
memset(&props, 0, sizeof(struct backlight_properties));
props.type = BACKLIGHT_PLATFORM;
@@ -7477,7 +7477,7 @@ static int __init volume_create_alsa_mixer(void)
sizeof(struct tpacpi_alsa_data), &card);
if (rc < 0 || !card) {
pr_err("Failed to create ALSA card structures: %d\n", rc);
- return 1;
+ return -ENODEV;
}
BUG_ON(!card->private_data);
@@ -7536,7 +7536,7 @@ static int __init volume_create_alsa_mixer(void)
err_exit:
snd_card_free(card);
- return 1;
+ return -ENODEV;
}
#define TPACPI_VOL_Q_MUTEONLY 0x0001 /* Mute-only control available */
@@ -7585,7 +7585,7 @@ static int __init volume_init(struct ibm_init_struct *iibm)
if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) {
pr_err("UCMS step volume mode not implemented, please contact %s\n",
TPACPI_MAIL);
- return 1;
+ return -ENODEV;
}
if (volume_capabilities >= TPACPI_VOL_CAP_MAX)
@@ -7598,7 +7598,7 @@ static int __init volume_init(struct ibm_init_struct *iibm)
if (!alsa_enable) {
vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
"ALSA mixer disabled by parameter, not loading volume subdriver...\n");
- return 1;
+ return -ENODEV;
}
quirks = tpacpi_check_quirks(volume_quirk_table,
@@ -7611,7 +7611,7 @@ static int __init volume_init(struct ibm_init_struct *iibm)
else if (quirks & TPACPI_VOL_Q_LEVEL)
tp_features.mixer_no_level_control = 0;
else
- return 1; /* no mixer */
+ return -ENODEV; /* no mixer */
break;
case TPACPI_VOL_CAP_VOLMUTE:
tp_features.mixer_no_level_control = 0;
@@ -7620,7 +7620,7 @@ static int __init volume_init(struct ibm_init_struct *iibm)
tp_features.mixer_no_level_control = 1;
break;
default:
- return 1;
+ return -ENODEV;
}
if (volume_capabilities != TPACPI_VOL_CAP_AUTO)
@@ -7792,7 +7792,7 @@ static int __init volume_init(struct ibm_init_struct *iibm)
{
pr_info("volume: disabled as there is no ALSA support in this kernel\n");
- return 1;
+ return -ENODEV;
}
static struct ibm_struct volume_driver_data = {
@@ -8729,7 +8729,7 @@ static int __init fan_init(struct ibm_init_struct *iibm)
}
} else {
pr_err("ThinkPad ACPI EC access misbehaving, fan status and control unavailable\n");
- return 1;
+ return -ENODEV;
}
}
@@ -8778,11 +8778,11 @@ static int __init fan_init(struct ibm_init_struct *iibm)
if (fan_status_access_mode != TPACPI_FAN_NONE)
fan_get_status_safe(NULL);
- if (fan_status_access_mode != TPACPI_FAN_NONE ||
- fan_control_access_mode != TPACPI_FAN_WR_NONE)
- return 0;
+ if (fan_status_access_mode == TPACPI_FAN_NONE &&
+ fan_control_access_mode == TPACPI_FAN_WR_NONE)
+ return -ENODEV;
- return 1;
+ return 0;
}
static void fan_exit(void)
@@ -9886,12 +9886,9 @@ static int tpacpi_proxsensor_init(struct ibm_init_struct *iibm)
palm_err = palmsensor_get(&has_palmsensor, &palm_state);
lap_err = lapsensor_get(&has_lapsensor, &lap_state);
- /*
- * If support isn't available (ENODEV) for both devices then quit, but
- * don't return an error.
- */
+ /* If support isn't available for both devices return -ENODEV */
if ((palm_err == -ENODEV) && (lap_err == -ENODEV))
- return 0;
+ return -ENODEV;
/* Otherwise, if there was an error return it */
if (palm_err && (palm_err != -ENODEV))
return palm_err;
@@ -10127,13 +10124,6 @@ static int tpacpi_dytc_profile_init(struct ibm_init_struct *iibm)
dytc_profile_available = false;
err = dytc_command(DYTC_CMD_QUERY, &output);
- /*
- * If support isn't available (ENODEV) then don't return an error
- * and don't create the sysfs group
- */
- if (err == -ENODEV)
- return 0;
- /* For all other errors we can flag the failure */
if (err)
return err;
@@ -10436,16 +10426,9 @@ static const struct attribute_group dprc_attr_group = {
static int tpacpi_dprc_init(struct ibm_init_struct *iibm)
{
- int err = get_wwan_antenna(&wwan_antennatype);
-
- /*
- * If support isn't available (ENODEV) then quit, but don't
- * return an error.
- */
- if (err == -ENODEV)
- return 0;
+ int err;
- /* If there was an error return it */
+ err = get_wwan_antenna(&wwan_antennatype);
if (err)
return err;
--
2.35.3