linux-kernel - [PATCH 5.4 11/53] tee: export teedev_open() and teedev_close

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Message-Id: <20220228172249.155940685@linuxfoundation.org>
Date:   Mon, 28 Feb 2022 18:24:09 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Sumit Garg <sumit.garg@...aro.org>,
        Jens Wiklander <jens.wiklander@...aro.org>
Subject: [PATCH 5.4 11/53] tee: export teedev_open() and teedev_close_context()

From: Jens Wiklander <jens.wiklander@...aro.org>

commit 1e2c3ef0496e72ba9001da5fd1b7ed56ccb30597 upstream.

Exports the two functions teedev_open() and teedev_close_context() in
order to make it easier to create a driver internal struct tee_context.

Reviewed-by: Sumit Garg <sumit.garg@...aro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@...aro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/tee/tee_core.c  |    6 ++++--
 include/linux/tee_drv.h |   14 ++++++++++++++
 2 files changed, 18 insertions(+), 2 deletions(-)

--- a/drivers/tee/tee_core.c
+++ b/drivers/tee/tee_core.c
@@ -28,7 +28,7 @@ static DEFINE_SPINLOCK(driver_lock);
 static struct class *tee_class;
 static dev_t tee_devt;
 
-static struct tee_context *teedev_open(struct tee_device *teedev)
+struct tee_context *teedev_open(struct tee_device *teedev)
 {
 	int rc;
 	struct tee_context *ctx;
@@ -56,6 +56,7 @@ err:
 	return ERR_PTR(rc);
 
 }
+EXPORT_SYMBOL_GPL(teedev_open);
 
 void teedev_ctx_get(struct tee_context *ctx)
 {
@@ -82,13 +83,14 @@ void teedev_ctx_put(struct tee_context *
 	kref_put(&ctx->refcount, teedev_ctx_release);
 }
 
-static void teedev_close_context(struct tee_context *ctx)
+void teedev_close_context(struct tee_context *ctx)
 {
 	struct tee_device *teedev = ctx->teedev;
 
 	teedev_ctx_put(ctx);
 	tee_device_put(teedev);
 }
+EXPORT_SYMBOL_GPL(teedev_close_context);
 
 static int tee_open(struct inode *inode, struct file *filp)
 {
--- a/include/linux/tee_drv.h
+++ b/include/linux/tee_drv.h
@@ -579,4 +579,18 @@ struct tee_client_driver {
 #define to_tee_client_driver(d) \
 		container_of(d, struct tee_client_driver, driver)
 
+/**
+ * teedev_open() - Open a struct tee_device
+ * @teedev:	Device to open
+ *
+ * @return a pointer to struct tee_context on success or an ERR_PTR on failure.
+ */
+struct tee_context *teedev_open(struct tee_device *teedev);
+
+/**
+ * teedev_close_context() - closes a struct tee_context
+ * @ctx:	The struct tee_context to close
+ */
+void teedev_close_context(struct tee_context *ctx);
+
 #endif /*__TEE_DRV_H*/