From 7b788014f78ef6a2f38f8c26824df7127a4db42b Mon Sep 17 00:00:00 2001
From: liruncong <liruncong2018@qq.com>
Date: Mon, 10 Sep 2018 19:40:08 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E6=AD=A3drivers=E4=B8=8B,armclang?=
 =?UTF-8?q?=E7=BC=96=E8=AF=91=E6=97=B6=E7=9A=84=E8=AD=A6=E5=91=8A=E6=88=96?=
 =?UTF-8?q?=E9=94=99=E8=AF=AF=20=20=20=20=E6=B3=A8:vcom=5Ftx=5Fthread=5Fen?=
 =?UTF-8?q?try=E4=B8=8B,=20if(!res=20&=20CDC=5FTX=5FHAS=5FDATE)=E5=BA=94?=
 =?UTF-8?q?=E4=B8=BAbug.?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 components/drivers/cputime/cputime.c              | 4 ++--
 components/drivers/usb/usbdevice/class/cdc_vcom.c | 2 +-
 components/drivers/usb/usbhost/core/hub.c         | 4 ++--
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/components/drivers/cputime/cputime.c b/components/drivers/cputime/cputime.c
index 20f41b6dac..0c260f13bd 100644
--- a/components/drivers/cputime/cputime.c
+++ b/components/drivers/cputime/cputime.c
@@ -68,7 +68,7 @@ uint32_t clock_cpu_microsecond(uint32_t cpu_tick)
 {
     float unit = clock_cpu_getres();
 
-    return (cpu_tick * unit) / 1000;
+    return (uint32_t)((cpu_tick * unit) / 1000);
 }
 
 /**
@@ -83,7 +83,7 @@ uint32_t clock_cpu_millisecond(uint32_t cpu_tick)
 {
     float unit = clock_cpu_getres();
 
-    return (cpu_tick * unit) / (1000 * 1000);
+    return (uint32_t)((cpu_tick * unit) / (1000 * 1000));
 }
 
 /**
diff --git a/components/drivers/usb/usbdevice/class/cdc_vcom.c b/components/drivers/usb/usbdevice/class/cdc_vcom.c
index 049c211521..eaff09c5d7 100644
--- a/components/drivers/usb/usbdevice/class/cdc_vcom.c
+++ b/components/drivers/usb/usbdevice/class/cdc_vcom.c
@@ -849,7 +849,7 @@ static void vcom_tx_thread_entry(void* parameter)
         {
             continue;
         }
-        if(!res & CDC_TX_HAS_DATE)
+        if(!(res & CDC_TX_HAS_DATE))
         {
             continue;
         }
diff --git a/components/drivers/usb/usbhost/core/hub.c b/components/drivers/usb/usbhost/core/hub.c
index 29b465d1b7..b022183d1a 100644
--- a/components/drivers/usb/usbhost/core/hub.c
+++ b/components/drivers/usb/usbhost/core/hub.c
@@ -502,11 +502,11 @@ static rt_err_t rt_usbh_hub_enable(void *arg)
 {
     int i = 0;
     rt_err_t ret = RT_EOK;
-    uep_desc_t ep_desc;
+    uep_desc_t ep_desc = RT_NULL;
     uhub_t hub;
     struct uinstance* device;
     struct uhintf* intf = (struct uhintf*)arg;
-    upipe_t pipe_in;
+    upipe_t pipe_in = RT_NULL;
     int timeout = 300;
     /* paremeter check */
     RT_ASSERT(intf != RT_NULL);