[PATCH 5.10 078/121] tee: export teedev_open() and teedev_close_context()

Greg Kroah-Hartman
2022-02-21T09:15:01Z

From: Jens Wiklander <jens.wiklander@linaro.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@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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
@@ -43,7 +43,7 @@ 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;
@@ -70,6 +70,7 @@ err:
return ERR_PTR(rc);

}
+EXPORT_SYMBOL_GPL(teedev_open);

void teedev_ctx_get(struct tee_context *ctx)
{
@@ -96,13 +97,14 @@ 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
@@ -582,4 +582,18 @@ 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*/