linux-kernel - [PATCH v2 1/2] uacce: Handle parent driver module removal

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Message-Id: <20220624142122.30528-2-zhangfei.gao@linaro.org>
Date:   Fri, 24 Jun 2022 22:21:21 +0800
From:   Zhangfei Gao <zhangfei.gao@...aro.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Arnd Bergmann <arnd@...db.de>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        jean-philippe <jean-philippe@...aro.org>,
        Wangzhou <wangzhou1@...ilicon.com>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>
Cc:     acc@...neuler.org, linux-kernel@...r.kernel.org,
        linux-crypto@...r.kernel.org, iommu@...ts.linux.dev,
        Zhangfei Gao <zhangfei.gao@...aro.org>,
        Yang Shen <shenyang39@...wei.com>
Subject: [PATCH v2 1/2] uacce: Handle parent driver module removal

Change cdev owner to parent driver owner, which blocks rmmod parent
driver module once fd is opened.

Signed-off-by: Yang Shen <shenyang39@...wei.com>
Signed-off-by: Zhangfei Gao <zhangfei.gao@...aro.org>
---
 drivers/misc/uacce/uacce.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/misc/uacce/uacce.c b/drivers/misc/uacce/uacce.c
index 281c54003edc..f82f2dd30e76 100644
--- a/drivers/misc/uacce/uacce.c
+++ b/drivers/misc/uacce/uacce.c
@@ -484,7 +484,7 @@ int uacce_register(struct uacce_device *uacce)
 		return -ENOMEM;
 
 	uacce->cdev->ops = &uacce_fops;
-	uacce->cdev->owner = THIS_MODULE;
+	uacce->cdev->owner = uacce->parent->driver->owner;
 
 	return cdev_device_add(uacce->cdev, &uacce->dev);
 }
-- 
2.36.1