From 3df2aadc391fb32fd5f7cb09fe0b7208c15c9642 Mon Sep 17 00:00:00 2001
From: Bob McWhirter <bmcwhirt@redhat.com>
Date: Tue, 20 Jul 2021 15:33:42 -0400
Subject: [PATCH] Avoid borrowck issue.

---
 embassy-stm32/src/spi/v3.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/embassy-stm32/src/spi/v3.rs b/embassy-stm32/src/spi/v3.rs
index a3f9b8911..eb8df44ae 100644
--- a/embassy-stm32/src/spi/v3.rs
+++ b/embassy-stm32/src/spi/v3.rs
@@ -210,6 +210,8 @@ impl<'d, T: Instance, Tx, Rx> Spi<'d, T, Tx, Rx> {
         Tx: TxDmaChannel<T>,
         Rx: RxDmaChannel<T>,
     {
+        let clock_byte_count = read.len();
+
         let rx_request = self.rxdma.request();
         let rx_src = T::regs().rxdr().ptr() as *mut u8;
         let rx_f = self.rxdma.read(rx_request, rx_src, read);
@@ -219,7 +221,7 @@ impl<'d, T: Instance, Tx, Rx> Spi<'d, T, Tx, Rx> {
         let clock_byte = 0x00;
         let tx_f = self
             .txdma
-            .write_x(tx_request, &clock_byte, read.len(), tx_dst);
+            .write_x(tx_request, &clock_byte, clock_byte_count, tx_dst);
 
         unsafe {
             T::regs().cfg1().modify(|reg| {