Thread (15 messages) 15 messages, 2 authors, 2021-10-14

Re: [PATCH v6 4/6] tee: export teedev_open() and teedev_close_context()

From: Sumit Garg <hidden>
Date: 2021-10-13 07:10:13
Also in: linux-devicetree, linux-doc, lkml, op-tee

On Wed, 6 Oct 2021 at 12:46, Jens Wiklander [off-list ref] wrote:
Exports the two functions teedev_open() and teedev_close_context() in
order to make it easier to create a driver internal struct tee_context.

Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
---
 drivers/tee/tee_core.c  |  6 ++++--
 include/linux/tee_drv.h | 14 ++++++++++++++
 2 files changed, 18 insertions(+), 2 deletions(-)
Reviewed-by: Sumit Garg <redacted>

-Sumit
quoted hunk ↗ jump to hunk
diff --git a/drivers/tee/tee_core.c b/drivers/tee/tee_core.c
index 85102d12d716..3fc426dad2df 100644
--- 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 @@ static struct tee_context *teedev_open(struct tee_device *teedev)
        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 *ctx)
        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)
 {
diff --git a/include/linux/tee_drv.h b/include/linux/tee_drv.h
index 3ebfea0781f1..26f42c4cd7a1 100644
--- 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*/
--
2.31.1
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