From 59d08d446743d8aaedfeb4c6bce55511fcbfa883 Mon Sep 17 00:00:00 2001
From: Melissa LeBlanc-Williams <melissa@adafruit.com>
Date: Thu, 8 Apr 2021 14:22:44 -0700
Subject: [PATCH] dreiver/i2c: delete i2c cmd_mux semaphore more cleanly

Merges https://github.com/espressif/esp-idf/pull/6847
---
 components/driver/i2c.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/components/driver/i2c.c b/components/driver/i2c.c
index 30f743509d..c75e204c02 100644
--- a/components/driver/i2c.c
+++ b/components/driver/i2c.c
@@ -367,7 +367,9 @@ esp_err_t i2c_driver_delete(i2c_port_t i2c_num)
     p_i2c->intr_handle = NULL;
 
     if (p_i2c->cmd_mux) {
+        // Let any command in progress finish.
         xSemaphoreTake(p_i2c->cmd_mux, portMAX_DELAY);
+        xSemaphoreGive(p_i2c->cmd_mux);
         vSemaphoreDelete(p_i2c->cmd_mux);
     }
     if (p_i2c_obj[i2c_num]->cmd_evt_queue) {