[PATCH v2] MdePkg/BaseCacheMaintenanceLib: RISC-V: Fix instruction cache not been invalidated

["Tuan Phan" <tphan@ventanamicro.com>]

When the range instruction cache invalidating not supported, the whole
instruction cache should be invalidated instead.

Signed-off-by: Tuan Phan <tphan@ventanamicro.com>
---
  V2:
  - Format with uncrustify.

 MdePkg/Library/BaseCacheMaintenanceLib/RiscVCache.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/MdePkg/Library/BaseCacheMaintenanceLib/RiscVCache.c b/MdePkg/Library/BaseCacheMaintenanceLib/RiscVCache.c
index 67a3387ff3c6..09de53fb5687 100644
--- a/MdePkg/Library/BaseCacheMaintenanceLib/RiscVCache.c
+++ b/MdePkg/Library/BaseCacheMaintenanceLib/RiscVCache.c
@@ -76,7 +76,12 @@ InvalidateInstructionCacheRange (
   IN UINTN  Length
   )
 {
-  DEBUG ((DEBUG_ERROR, "%a:RISC-V unsupported function.\n", __FUNCTION__));
+  DEBUG (
+         (DEBUG_WARN,
+          "%a:RISC-V unsupported function.\n"
+          "Invalidating the whole instruction cache instead.\n", __func__)
+         );
+  InvalidateInstructionCache ();
   return Address;
 }
 
-- 
2.25.1