Fixed bug #1211.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@15373 27425a3e-05d8-49a3-a47f-9c15f0e5edd8

os/hal/src/hal_sio.c

@@ -465,6 +465,9 @@ msg_t sioSynchronizeRX(SIODriver *siop, sysinterval_t timeout) {
   while (sio_lld_is_rx_empty(siop)) {
   /*lint -restore*/
     msg = osalThreadSuspendTimeoutS(&siop->sync_rx, timeout);
+    if (msg != MSG_OK) {
+      break;
+    }
   }
 
   osalSysUnlock();
@@ -502,6 +505,9 @@ msg_t sioSynchronizeTX(SIODriver *siop, sysinterval_t timeout) {
   while (sio_lld_is_tx_full(siop)) {
   /*lint -restore*/
     msg = osalThreadSuspendTimeoutS(&siop->sync_tx, timeout);
+    if (msg != MSG_OK) {
+      break;
+    }
   }
 
   osalSysUnlock();

readme.txt

@@ -110,6 +110,8 @@
        ARMv7-M and ARMv8-M-ML.
 - NEW: On STM32WBxx added a check on STM32_LSI_ENABLE required by IWDG.
 - NEW: Added SPIv2 support also to STM32WB and STM32WL.
+- FIX: Fixed missing exit condition in sioSynchronizeRX() and
+       sioSynchronizeTX() (bug #1211)(backported to 21.11.2).
 - FIX: Fixed missing check in chobjcaches.h (bug #1210)
        (backported to 20.3.5)(backported to 21.11.2).
 - FIX: Fixed misspelled chTraceSuspendI() function name (bug #1209)