Fixed _class_sof_handler function return value.

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@2345 bbd45198-f89e-11dd-88c7-29a3b14d5316

1 files changed, 6 insertions, 4 deletions

diff --git a/components/drivers/usb/usbdevice/class/cdc_vcom.c b/components/drivers/usb/usbdevice/class/cdc_vcom.c
index c3f1d992cf..a41493cda4 100644
--- a/components/drivers/usb/usbdevice/class/cdc_vcom.c
+++ b/components/drivers/usb/usbdevice/class/cdc_vcom.c
@@ -336,13 +336,13 @@ static rt_err_t _class_stop(udevice_t device)
  *

  * @return RT_EOK on successful.

  */

-rt_err_t _class_sof_handler(udevice_t device)

+static rt_err_t _class_sof_handler(udevice_t device)

 {

     rt_uint32_t level;

     rt_size_t size;

     static rt_uint32_t frame_count = 0;

 

-    if(vcom_connected != RT_TRUE) return;

+    if(vcom_connected != RT_TRUE) return -RT_ERROR;

 

     if (frame_count ++ == 5)

     {

@@ -352,7 +352,7 @@ rt_err_t _class_sof_handler(udevice_t device)
         frame_count = 0;

 

         size = RT_RINGBUFFER_SIZE(&tx_ringbuffer);

-        if(size == 0) return;

+        if(size == 0) return -RT_EFULL;

 

         size = size > mps ? mps : size;

         

@@ -363,6 +363,8 @@ rt_err_t _class_sof_handler(udevice_t device)
         /* send data to host */

         dcd_ep_write(device->dcd, ep_in, ep_in->buffer, size);

     }

+

+    return RT_EOK;

 }

 

 static struct uclass_ops ops =

@@ -375,7 +377,7 @@ static struct uclass_ops ops =
 /**

  * This function will configure cdc descriptor.

  *

- * @param comm the communcation interface number.

+ * @param comm the communication interface number.

  * @param data the data interface number.

  *

  * @return RT_EOK on successful.