From c699613cdc358275c97074de7163fd66439dbda3 Mon Sep 17 00:00:00 2001
From: Giovanni Di Sirio <gdisirio@gmail.com>
Date: Wed, 6 Jul 2022 08:36:40 +0000
Subject: [PATCH] Made sioStopOperation() and sioStartOperation() call possible
 in both SIO_READY and SIO_ACTIVE states.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@15677 27425a3e-05d8-49a3-a47f-9c15f0e5edd8
---
 os/hal/src/hal_sio.c | 9 ++++++---
 readme.txt           | 3 ++-
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/os/hal/src/hal_sio.c b/os/hal/src/hal_sio.c
index fc303af5e..57ac3e43d 100644
--- a/os/hal/src/hal_sio.c
+++ b/os/hal/src/hal_sio.c
@@ -309,7 +309,8 @@ void sioStartOperation(SIODriver *siop, const SIOOperation *operation) {
 
   osalSysLock();
 
-  osalDbgAssert(siop->state == SIO_READY, "invalid state");
+  osalDbgAssert((siop->state == SIO_READY) ||
+                (siop->state == SIO_ACTIVE), "invalid state");
 
   /* The application can pass NULL if it is not interested in callbacks,
      attaching a default operation structure.*/
@@ -319,9 +320,11 @@ void sioStartOperation(SIODriver *siop, const SIOOperation *operation) {
   else {
     siop->operation = &default_operation;
   }
-  siop->state     = SIO_ACTIVE;
 
-  sio_lld_start_operation(siop);
+  if (siop->state == SIO_READY) {
+    sio_lld_start_operation(siop);
+    siop->state     = SIO_ACTIVE;
+  }
 
   osalSysUnlock();
 }
diff --git a/readme.txt b/readme.txt
index 5fe83884d..a694d6d97 100644
--- a/readme.txt
+++ b/readme.txt
@@ -74,7 +74,8 @@
 *****************************************************************************
 
 *** Next ***
-- NEW: Made sioStopOperation() call possible in SIO_READY state.
+- NEW: Made sioStopOperation() and sioStartOperation() call possible in
+       both SIO_READY and SIO_ACTIVE states.
 - NEW: Non-proprietary LLVM build support.
 - NEW: Added palReadGroupLatch() to PAL driver.
 - NEW: Added a Posix-favored shell named "msh" (Mini Shell). The shell is able