From bd27d7fc26b8757c4a27c95bac6470d0a5c49afd Mon Sep 17 00:00:00 2001
From: Andrew Tridgell <andrew@tridgell.net>
Date: Wed, 13 Feb 2019 18:44:45 +1100
Subject: [PATCH] HAL_ChibiOS: fixed build on F4

---
 libraries/AP_HAL_ChibiOS/shared_dma.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/libraries/AP_HAL_ChibiOS/shared_dma.cpp b/libraries/AP_HAL_ChibiOS/shared_dma.cpp
index acd94bfbf5..45ad6a4f4c 100644
--- a/libraries/AP_HAL_ChibiOS/shared_dma.cpp
+++ b/libraries/AP_HAL_ChibiOS/shared_dma.cpp
@@ -122,11 +122,14 @@ void Shared_DMA::lock_core(void)
             locks[stream_id2].deallocate = deallocate;
             locks[stream_id2].obj = this;
         }
-    } else if (stream_id1 == STM32_DMA_STREAM_ID_ANY ||
-               stream_id2 == STM32_DMA_STREAM_ID_ANY) {
+    }
+#ifdef STM32_DMA_STREAM_ID_ANY
+    else if (stream_id1 == STM32_DMA_STREAM_ID_ANY ||
+             stream_id2 == STM32_DMA_STREAM_ID_ANY) {
         // call allocator without needing locking
         allocate(this);
     }
+#endif
     have_lock = true;
 }