From 3aeeeb0d784d843b521b4b8b222114ef7ba71363 Mon Sep 17 00:00:00 2001
From: Peter Krull <peterkrullpeter@gmail.com>
Date: Thu, 19 Sep 2024 20:07:08 +0200
Subject: [PATCH] stm32: Start DMA before clearing, avoid panic in updater
 ringbuffer impl

---
 embassy-stm32/src/usart/ringbuffered.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/embassy-stm32/src/usart/ringbuffered.rs b/embassy-stm32/src/usart/ringbuffered.rs
index 2d9c63820..75834bf37 100644
--- a/embassy-stm32/src/usart/ringbuffered.rs
+++ b/embassy-stm32/src/usart/ringbuffered.rs
@@ -81,9 +81,9 @@ impl<'d> RingBufferedUartRx<'d> {
     /// Note: This is also done automatically by [`read()`] if required.
     pub fn start_uart(&mut self) {
         // Clear the buffer so that it is ready to receive data
-        self.ring_buf.clear();
         compiler_fence(Ordering::SeqCst);
         self.ring_buf.start();
+        self.ring_buf.clear();
 
         let r = self.info.regs;
         // clear all interrupts and DMA Rx Request