From bbc81146ecb3832e9ec1531ef6d48fec6c7c0d8c Mon Sep 17 00:00:00 2001
From: Catherine <whitequark@whitequark.org>
Date: Mon, 19 Jun 2023 09:06:41 +0000
Subject: [PATCH] BDMA: request stop after busy loop in blocking_wait().

Otherwise the channel cannot be used again, since CR.EN remains set
and the DMA channel registers are read-only while it is set.
---
 embassy-stm32/src/dma/bdma.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/embassy-stm32/src/dma/bdma.rs b/embassy-stm32/src/dma/bdma.rs
index c0a503e2..e9b75d86 100644
--- a/embassy-stm32/src/dma/bdma.rs
+++ b/embassy-stm32/src/dma/bdma.rs
@@ -327,6 +327,7 @@ impl<'a, C: Channel> Transfer<'a, C> {
 
     pub fn blocking_wait(mut self) {
         while self.is_running() {}
+        self.request_stop();
 
         // "Subsequent reads and writes cannot be moved ahead of preceding reads."
         fence(Ordering::SeqCst);