From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 29D3F8F57 for ; Sun, 16 Jul 2023 20:45:08 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A2690C433C7; Sun, 16 Jul 2023 20:45:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1689540308; bh=9P9kM6IpkhDOKDcWf9Bqdy+aX30Bqt56Q+QC3y7SJRM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=i+p9e42uXjIw1EVsz9Q/IcUyJMG/bDFzbGT77q7uc40NS731KkkzLlO51V9u0SQh6 uORCDcHA/FaMc+mJiF3lHsn1fEb2mmKLqTReLUpu+4OB1Ct5w7aeoj7OHyyBP0OXd7 g6fLB83mEZylOwmPTlOHLfwQk/31LdWRIhiolSPM= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Hans de Goede , Sasha Levin Subject: [PATCH 6.1 289/591] platform/x86: lenovo-yogabook: Fix work race on remove() Date: Sun, 16 Jul 2023 21:47:08 +0200 Message-ID: <20230716194931.371101807@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230716194923.861634455@linuxfoundation.org> References: <20230716194923.861634455@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Hans de Goede [ Upstream commit 9148cd2eb4450a8e9c49c8a14201fb82f651128f ] When yogabook_wmi_remove() runs yogabook_wmi_work might still be running and using the devices which yogabook_wmi_remove() puts. To avoid this move to explicitly cancelling the work rather then using devm_work_autocancel(). This requires also making the yogabook_backside_hall_irq handler non devm managed, so that it cannot re-queue the work while yogabook_wmi_remove() runs. Fixes: c0549b72d99d ("platform/x86: lenovo-yogabook-wmi: Add driver for Lenovo Yoga Book") Signed-off-by: Hans de Goede Link: https://lore.kernel.org/r/20230430165807.472798-3-hdegoede@redhat.com Signed-off-by: Sasha Levin --- drivers/platform/x86/lenovo-yogabook-wmi.c | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-) diff --git a/drivers/platform/x86/lenovo-yogabook-wmi.c b/drivers/platform/x86/lenovo-yogabook-wmi.c index 5f4bd1eec38a9..3a6de4ab74a41 100644 --- a/drivers/platform/x86/lenovo-yogabook-wmi.c +++ b/drivers/platform/x86/lenovo-yogabook-wmi.c @@ -2,7 +2,6 @@ /* WMI driver for Lenovo Yoga Book YB1-X90* / -X91* tablets */ #include -#include #include #include #include @@ -248,10 +247,7 @@ static int yogabook_wmi_probe(struct wmi_device *wdev, const void *context) data->brightness = YB_KBD_BL_DEFAULT; set_bit(YB_KBD_IS_ON, &data->flags); set_bit(YB_DIGITIZER_IS_ON, &data->flags); - - r = devm_work_autocancel(&wdev->dev, &data->work, yogabook_wmi_work); - if (r) - return r; + INIT_WORK(&data->work, yogabook_wmi_work); data->kbd_adev = acpi_dev_get_first_match_dev("GDIX1001", NULL, -1); if (!data->kbd_adev) { @@ -299,10 +295,9 @@ static int yogabook_wmi_probe(struct wmi_device *wdev, const void *context) } data->backside_hall_irq = r; - r = devm_request_irq(&wdev->dev, data->backside_hall_irq, - yogabook_backside_hall_irq, - IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, - "backside_hall_sw", data); + r = request_irq(data->backside_hall_irq, yogabook_backside_hall_irq, + IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, + "backside_hall_sw", data); if (r) { dev_err_probe(&wdev->dev, r, "Requesting backside_hall_sw IRQ\n"); goto error_put_devs; @@ -318,11 +313,14 @@ static int yogabook_wmi_probe(struct wmi_device *wdev, const void *context) r = devm_led_classdev_register(&wdev->dev, &data->kbd_bl_led); if (r < 0) { dev_err_probe(&wdev->dev, r, "Registering backlight LED device\n"); - goto error_put_devs; + goto error_free_irq; } return 0; +error_free_irq: + free_irq(data->backside_hall_irq, data); + cancel_work_sync(&data->work); error_put_devs: put_device(data->dig_dev); put_device(data->kbd_dev); @@ -335,6 +333,8 @@ static void yogabook_wmi_remove(struct wmi_device *wdev) { struct yogabook_wmi *data = dev_get_drvdata(&wdev->dev); + free_irq(data->backside_hall_irq, data); + cancel_work_sync(&data->work); put_device(data->dig_dev); put_device(data->kbd_dev); acpi_dev_put(data->dig_adev); -- 2.39.2