rtc: optee: fix memory leak on driver removal

[ Upstream commit a531350 ]

Fix a memory leak in case of driver removal.
Free the shared memory used for arguments exchanges between kernel and
OP-TEE RTC PTA.

Fixes: 81c2f05 ("rtc: optee: add RTC driver for OP-TEE RTC PTA")
Signed-off-by: Clément Le Goffic <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Alexandre Belloni <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>

Author: Upsylonbare

drivers/rtc/rtc-optee.c

@@ -320,6 +320,7 @@ static int optee_rtc_remove(struct device *dev)
 {
 	struct optee_rtc *priv = dev_get_drvdata(dev);
 
+	tee_shm_free(priv->shm);
 	tee_client_close_session(priv->ctx, priv->session_id);
 	tee_client_close_context(priv->ctx);