From a22b308d42f721b09fa3d4f50c3ba9c456fe62a0 Mon Sep 17 00:00:00 2001
From: Kyle Tso <kyletso@google.com>
Date: Wed, 12 Jun 2024 17:14:02 +0800
Subject: [PATCH] usb: Add retry on role switch

Bug: 341996696
Change-Id: I8caa65288af1588d24fea4aa6c5768d45d69bbd5
Signed-off-by: Kyle Tso <kyletso@google.com>
(cherry picked from commit ef5856a4474002cc35a51377adffddd4cb239796)
---
 usb/usb/Usb.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/usb/usb/Usb.cpp b/usb/usb/Usb.cpp
index 4bdd5ed..1a03917 100644
--- a/usb/usb/Usb.cpp
+++ b/usb/usb/Usb.cpp
@@ -672,6 +672,10 @@ ScopedAStatus Usb::switchRole(const string& in_portName, const PortRole& in_role
         fp = fopen(filename.c_str(), "w");
         if (fp != NULL) {
             int ret = fputs(convertRoletoString(in_role).c_str(), fp);
+            if (ret == EAGAIN) {
+                std::this_thread::sleep_for(std::chrono::milliseconds(700));
+                ret = fputs(convertRoletoString(in_role).c_str(), fp);
+            }
             fclose(fp);
             if ((ret != EOF) && ReadFileToString(filename, &written)) {
                 written = Trim(written);