Merge pull request #749 from sandrine-bailleux-arm/sb/fix-bl1_plat_mem_check-doc
Porting guide: Improve bl1_plat_mem_check() doc
diff --git a/docs/porting-guide.md b/docs/porting-guide.md
index aa014f1..7534e39 100644
--- a/docs/porting-guide.md
+++ b/docs/porting-guide.md
@@ -1087,13 +1087,15 @@
Argument : uintptr_t mem_base, unsigned int mem_size,
unsigned int flags
- Return : void
+ Return : int
BL1 calls this function while handling FWU copy and authenticate SMCs. The
platform must ensure that the provided `mem_base` and `mem_size` are mapped into
BL1, and that this memory corresponds to either a secure or non-secure memory
region as indicated by the security state of the `flags` argument.
+This function must return 0 on success, a non-null error code otherwise.
+
The default implementation of this function asserts therefore platforms must
override it when using the FWU feature.