arm-bsp/u-boot: corstone1000: Disable mm_communicate failure log

When a getVariable() call is made with data size set to 0,
mm_communicate should return EFI_BUFFER_TOO_SMALL. This is
an expected behavior. There should not be any failure logs
in this case. So the error log is commented here.

Change-Id: Id5b36928b1450ef9f83d34a3ab7feb4839ff9734
Signed-off-by: Gowtham Suresh Kumar <gowtham.sureshkumar@arm.com>
Signed-off-by: Jon Mason <jon.mason@arm.com>

meta-arm-bsp/recipes-bsp/u-boot/u-boot/corstone1000/0050-Comment-mm_communicate-failure-log.patch

@@ -0,0 +1,35 @@
+Upstream-Status: Pending [Not submitted to upstream yet]
+Signed-off-by: Gowtham Suresh Kumar <gowtham.sureshkumar@arm.com>
+
+From 152ff06c983b7b1a685d82bc229efdd6260d9a12 Mon Sep 17 00:00:00 2001
+From: Gowtham Suresh Kumar <gowtham.sureshkumar@arm.com>
+Date: Fri, 24 Dec 2021 14:22:52 +0000
+Subject: [PATCH] Comment mm_communicate failure log
+
+When a getVariable() call is made with data size set to 0,
+mm_communicate should return EFI_BUFFER_TOO_SMALL. This is
+an expected behavior. There should not be any failure logs
+in this case. So the error log is commented here.
+---
+ lib/efi_loader/efi_variable_tee.c | 5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+diff --git a/lib/efi_loader/efi_variable_tee.c b/lib/efi_loader/efi_variable_tee.c
+index b466702983..fc4d684669 100644
+--- a/lib/efi_loader/efi_variable_tee.c
++++ b/lib/efi_loader/efi_variable_tee.c
+@@ -407,7 +407,10 @@ static efi_status_t __efi_runtime mm_communicate(u8 *comm_buf, efi_uintn_t dsize
+ 	ret = ffa_mm_communicate(comm_buf, dsize);
+ 	#endif
+ 	if (ret != EFI_SUCCESS) {
+-		log_err("%s failed!\n", __func__);
++		/* mm_communicate failure is logged even when getVariable() is called
++		 * with data size set to 0. This is not expected so logging is commented.
++		*/
++		//log_err("%s failed!\n", __func__);
+ 		return ret;
+ 	}
+ 
+-- 
+2.17.1
+

meta-arm-bsp/recipes-bsp/u-boot/u-boot_%.bbappend

@@ -59,6 +59,7 @@ SRC_URI:append:corstone1000 = " \
       file://0047-efi_firmware-add-get_image_info-for-corstone1000.patch \
       file://0048-corstone1000-enable-ethernet-device.patch \
       file://0049-efi_loader-Fix-loaded-image-alignment.patch \
+      file://0050-Comment-mm_communicate-failure-log.patch \
       "
 
 #