From: Hans de Goede <hdegoede@redhat.com>
To: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: "Ilpo Järvinen" <ilpo.jarvinen@linux.intel.com>,
"Andy Shevchenko" <andy@kernel.org>,
"Pavel Machek" <pavel@ucw.cz>, "Lee Jones" <lee@kernel.org>,
"Kate Hsuan" <hpa@redhat.com>,
"Sebastian Reichel" <sre@kernel.org>,
platform-driver-x86@vger.kernel.org,
"André Apitzsch" <git@apitzsch.eu>,
linux-leds@vger.kernel.org, linux-pm@vger.kernel.org
Subject: Re: [PATCH v8 3/7] leds: rgb: leds-ktd202x: Initialize mutex earlier
Date: Fri, 3 May 2024 08:53:48 +0200 [thread overview]
Message-ID: <88d18069-3327-463e-afa6-b80645dfbb7f@redhat.com> (raw)
In-Reply-To: <CAHp75VdSHGXuvGtPBuQSeDLTg0FjPNStcgG3-p07cfVLi_D_YA@mail.gmail.com>
Hi,
On 5/3/24 5:43 AM, Andy Shevchenko wrote:
> On Fri, May 3, 2024 at 12:14 AM Hans de Goede <hdegoede@redhat.com> wrote:
>>
>> 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
>
> ...
>
>> + mutex_init(&chip->mutex);
>
> devm_mutex_init() ?
That is not in Torvald's tree yet.
Regards,
Hans
next prev parent reply other threads:[~2024-05-03 6:53 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-02 21:14 [PATCH v8 0/7] KTD2026 indicator LED for X86 Xiaomi Pad2 Hans de Goede
2024-05-02 21:14 ` [PATCH v8 1/7] leds: rgb: leds-ktd202x: Get device properties through fwnode to support ACPI Hans de Goede
2024-05-02 21:14 ` [PATCH v8 2/7] leds: rgb: leds-ktd202x: I2C ID tables for KTD2026 and 2027 Hans de Goede
2024-05-02 21:14 ` [PATCH v8 3/7] leds: rgb: leds-ktd202x: Initialize mutex earlier Hans de Goede
2024-05-03 3:43 ` Andy Shevchenko
2024-05-03 6:53 ` Hans de Goede [this message]
2024-05-03 7:03 ` Lee Jones
2024-05-03 13:57 ` Hans de Goede
2024-05-02 21:14 ` [PATCH v8 4/7] leds: core: Add led_mc_set_brightness() function Hans de Goede
2024-05-02 21:14 ` [PATCH v8 5/7] leds: trigger: Add led_mc_trigger_event() function Hans de Goede
2024-05-02 21:14 ` [PATCH v8 6/7] power: supply: power-supply-leds: Add charging_orange_full_green trigger for RGB LED Hans de Goede
2024-05-03 4:10 ` Andy Shevchenko
2024-05-02 21:14 ` [PATCH v8 7/7] platform: x86-android-tablets: Xiaomi pad2 RGB LED fwnode updates Hans de Goede
2024-05-03 4:12 ` [PATCH v8 0/7] KTD2026 indicator LED for X86 Xiaomi Pad2 Andy Shevchenko
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