From b732336f2f3ff9f7ec27d1d75a3e78cc1a0ad054 Mon Sep 17 00:00:00 2001
From: Albin Hedman <albin9604@gmail.com>
Date: Wed, 3 Dec 2025 18:04:48 +0100
Subject: GPDMA suspend channel before reset if already enabled

---
 embassy-stm32/src/dma/gpdma/mod.rs | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'embassy-stm32/src')

diff --git a/embassy-stm32/src/dma/gpdma/mod.rs b/embassy-stm32/src/dma/gpdma/mod.rs
index bfd0570f8..51c107cb4 100644
--- a/embassy-stm32/src/dma/gpdma/mod.rs
+++ b/embassy-stm32/src/dma/gpdma/mod.rs
@@ -238,6 +238,11 @@ impl AnyChannel {
         // "Preceding reads and writes cannot be moved past subsequent writes."
         fence(Ordering::SeqCst);
 
+        if ch.cr().read().en() {
+            ch.cr().modify(|w| w.set_susp(true));
+            while !ch.sr().read().suspf() {}
+        }
+
         ch.cr().write(|w| w.set_reset(true));
         ch.fcr().write(|w| {
             // Clear all irqs
-- 
cgit