From 7db27eeaba0fd5ddb1e49977bb7e342a1980aa3d Mon Sep 17 00:00:00 2001
From: Gowtham Suresh Kumar <gowtham.sureshkumar@arm.com>
Date: Sun, 12 Dec 2021 17:51:17 +0000
Subject: [PATCH 19/27] Return proper error code when rx buffer is larger

ffa_mm_communicate should return EFI_BUFFER_TOO_SMALL when
the buffer received from the secure world is larger than the
comm buffer as this value is forwarded by mm_communicate.

Signed-off-by: Gowtham Suresh Kumar <gowtham.sureshkumar@arm.com>
Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
---
 lib/efi_loader/efi_variable_tee.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/efi_loader/efi_variable_tee.c b/lib/efi_loader/efi_variable_tee.c
index b6be2b54a030..38655a9dbb7c 100644
--- a/lib/efi_loader/efi_variable_tee.c
+++ b/lib/efi_loader/efi_variable_tee.c
@@ -358,7 +358,7 @@ static efi_status_t __efi_runtime ffa_mm_communicate(void *comm_buf, ulong comm_
 
 		if (rx_data_size > comm_buf_size) {
 			unmap_sysmem(virt_shared_buf);
-			return EFI_OUT_OF_RESOURCES;
+			return EFI_BUFFER_TOO_SMALL;
 		}
 
 		efi_memcpy_runtime(comm_buf, virt_shared_buf, rx_data_size);
-- 
2.30.2