mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-29 10:08:59 +00:00
56d97fff55
This commit adds the Linux kernel mainline driver "leds-ktd202x" for the KinetIC KTD2026 and KTD2027 RGB/RBGW controller with I2C interface that was introduced in kernel version 6.7, last changed in mainline on 2024-05-31. At least the Acer Connect Vero W6m (a variant of the Acer Predator Connect W6 without 2.5G eth1 port, usb3 port, and the 6 on-board gpio RGB LEDs) is equipped with a KTD2026 (and a single RGB LED attached to it used by the stock firmware as status LED), and maybe other router devices also are. Signed-off-by: George Oldfort <openwrt@10099.de> Link: https://github.com/openwrt/openwrt/pull/16860 Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
63 lines
1.8 KiB
Diff
63 lines
1.8 KiB
Diff
From e1b08c6f5b92d408a9fcc1030a340caeb9852250 Mon Sep 17 00:00:00 2001
|
|
From: Hans de Goede <hdegoede@redhat.com>
|
|
Date: Fri, 31 May 2024 13:41:21 +0200
|
|
Subject: leds: rgb: leds-ktd202x: Initialize mutex earlier
|
|
|
|
The mutex must be initialized before the LED class device is registered
|
|
otherwise there is a race where it may get used before it is initialized:
|
|
|
|
DEBUG_LOCKS_WARN_ON(lock->magic != lock)
|
|
WARNING: CPU: 2 PID: 2045 at kernel/locking/mutex.c:587 __mutex_lock
|
|
...
|
|
RIP: 0010:__mutex_lock+0x7db/0xc10
|
|
...
|
|
set_brightness_delayed_set_brightness.part.0+0x17/0x60
|
|
set_brightness_delayed+0xf1/0x100
|
|
process_one_work+0x222/0x5a0
|
|
|
|
Move the mutex_init() call earlier to avoid this race condition and
|
|
switch to devm_mutex_init() to avoid the need to add error-exit
|
|
cleanup to probe() if probe() fails later on.
|
|
|
|
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
|
|
Reviewed-by: Andy Shevchenko <andy@kernel.org>
|
|
Link: https://lore.kernel.org/r/20240531114124.45346-4-hdegoede@redhat.com
|
|
Signed-off-by: Lee Jones <lee@kernel.org>
|
|
---
|
|
drivers/leds/rgb/leds-ktd202x.c | 8 ++++----
|
|
1 file changed, 4 insertions(+), 4 deletions(-)
|
|
|
|
(limited to 'drivers/leds/rgb')
|
|
|
|
--- a/drivers/leds/rgb/leds-ktd202x.c
|
|
+++ b/drivers/leds/rgb/leds-ktd202x.c
|
|
@@ -556,6 +556,10 @@ static int ktd202x_probe(struct i2c_clie
|
|
return ret;
|
|
}
|
|
|
|
+ ret = devm_mutex_init(dev, &chip->mutex);
|
|
+ if (ret)
|
|
+ return ret;
|
|
+
|
|
chip->num_leds = (unsigned long)i2c_get_match_data(client);
|
|
|
|
chip->regulators[0].supply = "vin";
|
|
@@ -584,8 +588,6 @@ static int ktd202x_probe(struct i2c_clie
|
|
return ret;
|
|
}
|
|
|
|
- mutex_init(&chip->mutex);
|
|
-
|
|
return 0;
|
|
}
|
|
|
|
@@ -594,8 +596,6 @@ static void ktd202x_remove(struct i2c_cl
|
|
struct ktd202x *chip = i2c_get_clientdata(client);
|
|
|
|
ktd202x_chip_disable(chip);
|
|
-
|
|
- mutex_destroy(&chip->mutex);
|
|
}
|
|
|
|
static void ktd202x_shutdown(struct i2c_client *client)
|