linux-kernel - [PATCH v6 3/3] platform/chrome: cros_ec_chardev: Secure cros_ec

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Message-ID: <20251106152712.11850-4-tzungbi@kernel.org>
Date: Thu,  6 Nov 2025 23:27:12 +0800
From: Tzung-Bi Shih <tzungbi@...nel.org>
To: Benson Leung <bleung@...omium.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"Rafael J . Wysocki" <rafael@...nel.org>,
	Danilo Krummrich <dakr@...nel.org>
Cc: Jonathan Corbet <corbet@....net>,
	Shuah Khan <shuah@...nel.org>,
	linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	chrome-platform@...ts.linux.dev,
	linux-kselftest@...r.kernel.org,
	tzungbi@...nel.org,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Bartosz Golaszewski <brgl@...ev.pl>,
	Wolfram Sang <wsa+renesas@...g-engineering.com>,
	Simona Vetter <simona.vetter@...ll.ch>,
	Dan Williams <dan.j.williams@...el.com>,
	Jason Gunthorpe <jgg@...dia.com>
Subject: [PATCH v6 3/3] platform/chrome: cros_ec_chardev: Secure cros_ec_device via revocable

Miscdevice now supports revocable fops replacement.  Use it to secure
the cros_ec_device is available.

Signed-off-by: Tzung-Bi Shih <tzungbi@...nel.org>
---
v6:
- Modify the API usage accordingly.

v5: https://lore.kernel.org/chrome-platform/20251016054204.1523139-8-tzungbi@kernel.org
- No primary changes but modify the API usage accordingly.

v4: https://lore.kernel.org/chrome-platform/20250923075302.591026-8-tzungbi@kernel.org

 drivers/platform/chrome/cros_ec_chardev.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/platform/chrome/cros_ec_chardev.c b/drivers/platform/chrome/cros_ec_chardev.c
index c9d80ad5b57e..a7543e1bc07a 100644
--- a/drivers/platform/chrome/cros_ec_chardev.c
+++ b/drivers/platform/chrome/cros_ec_chardev.c
@@ -385,6 +385,7 @@ static int cros_ec_chardev_probe(struct platform_device *pdev)
 	misc->fops = &chardev_fops;
 	misc->name = ec_platform->ec_name;
 	misc->parent = pdev->dev.parent;
+	misc->revocable = true;
 
 	dev_set_drvdata(&pdev->dev, misc);
 
-- 
2.48.1