[task-runner] only perform read when FD is set (#2697)

openthread · Feb 7, 2025 · 3ad3db8 · 3ad3db8
1 parent eb54f60
commit 3ad3db8
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/src/common/task_runner.cpp b/src/common/task_runner.cpp
@@ -110,10 +110,10 @@ void TaskRunner::Update(MainloopContext &aMainloop)
 
 void TaskRunner::Process(const MainloopContext &aMainloop)
 {
-    OTBR_UNUSED_VARIABLE(aMainloop);
-
     ssize_t rval;
 
+    VerifyOrExit(FD_ISSET(mEventFd[kRead], &aMainloop.mReadFdSet));
+
     // Read any data in the pipe.
     do
     {
@@ -125,6 +125,7 @@ void TaskRunner::Process(const MainloopContext &aMainloop)
     // Critical error happens, simply die.
     VerifyOrDie(errno == EAGAIN || errno == EWOULDBLOCK, strerror(errno));
 
+exit:
     PopTasks();
 }