From 78f9f87a9d659aa823aebd28e1a0014dbf80e800 Mon Sep 17 00:00:00 2001
From: Elon Zhang <zhangzj@rock-chips.com>
Date: Tue, 14 May 2019 17:33:58 +0800
Subject: [PATCH] OP-TEE: optimize client application running process

Client applications are forbidden to run before supplicant
application is ready. Detection of supplicant application
status is added at the entry of open operation.

Change-Id: Ief4106bcd75251790b82d76e4d69092900af29e3
Signed-off-by: Elon Zhang <zhangzj@rock-chips.com>
---
 security/optee_linuxdriver/core/tee_core.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/security/optee_linuxdriver/core/tee_core.c b/security/optee_linuxdriver/core/tee_core.c
index c718481982fb..ef949c583e32 100644
--- a/security/optee_linuxdriver/core/tee_core.c
+++ b/security/optee_linuxdriver/core/tee_core.c
@@ -174,6 +174,12 @@ static int tee_supp_open(struct tee *tee)
 					__func__);
 			atomic_sub(1, &tee->rpc->used);
 		}
+	} else {
+		if (atomic_read(&tee->rpc->used) == 0) {
+			ret = -EPERM;
+			dev_err(tee->dev, "%s: ERROR Supplicant application NOT ready\n",
+				__func__);
+		}
 	}
 
 	return ret;