From f9be3c80e3631ebfc1ecc3e1f1d2df21277c0608 Mon Sep 17 00:00:00 2001
From: guozhanxin <guozhanxin@rt-thread.com>
Date: Wed, 24 Mar 2021 09:31:59 +0800
Subject: [PATCH] add error checks of rt_mutex_create()

---
 bsp/simulator/drivers/sd_sim.c | 6 +++++-
 bsp/simulator/drivers/sdl_fb.c | 4 ++++
 bsp/stm32f20x/Drivers/i2c.c    | 5 +++++
 3 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/bsp/simulator/drivers/sd_sim.c b/bsp/simulator/drivers/sd_sim.c
index 41c495403a..adc489be20 100755
--- a/bsp/simulator/drivers/sd_sim.c
+++ b/bsp/simulator/drivers/sd_sim.c
@@ -133,7 +133,6 @@ static rt_err_t rt_sdcard_control(rt_device_t dev, int cmd, void *args)
     return RT_EOK;
 }
 
-
 rt_err_t rt_hw_sdcard_init(const char *spi_device_name)
 {
     int size;
@@ -144,6 +143,11 @@ rt_err_t rt_hw_sdcard_init(const char *spi_device_name)
     device = &(sd->parent);
 
     lock = rt_mutex_create("lock", RT_IPC_FLAG_FIFO);
+    if (lock == RT_NULL) 
+    {
+        LOG_E("Create mutex in rt_hw_sdcard_init failed!");
+        return -RT_ERROR;
+    }
 
     /* open sd card file, if not exist, then create it  */
     sd->file = fopen(SDCARD_SIM, "rb+");
diff --git a/bsp/simulator/drivers/sdl_fb.c b/bsp/simulator/drivers/sdl_fb.c
index 986c3139de..7b25da9c3c 100755
--- a/bsp/simulator/drivers/sdl_fb.c
+++ b/bsp/simulator/drivers/sdl_fb.c
@@ -221,6 +221,10 @@ static void sdlfb_hw_init(void)
     rt_device_register(RT_DEVICE(&_device), "sdl", RT_DEVICE_FLAG_RDWR);
 
     sdllock = rt_mutex_create("fb", RT_IPC_FLAG_FIFO);
+    if (sdllock == RT_NULL) 
+    {
+        LOG_E("Create mutex for sdlfb failed!");
+    }
 }
 
 #ifdef _WIN32
diff --git a/bsp/stm32f20x/Drivers/i2c.c b/bsp/stm32f20x/Drivers/i2c.c
index e1b4b02ffa..27e9ce0280 100644
--- a/bsp/stm32f20x/Drivers/i2c.c
+++ b/bsp/stm32f20x/Drivers/i2c.c
@@ -572,6 +572,11 @@ void I2C1_INIT()
 	
 		rt_event_init(&i2c_event, "i2c_event", RT_IPC_FLAG_FIFO );
 		i2c_mux = rt_mutex_create("i2c_mux", RT_IPC_FLAG_FIFO );
+        if (i2c_mux == RT_NULL) 
+        {
+            LOG_E("Create mutex for i2c_mux failed!");
+            return;
+        }
 		i2c1_init_flag = 1;
 	}
 }