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extra input checking

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16493 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Frank Gevaerts 2008-03-02 23:34:30 +00:00
parent 8493f5bcf6
commit 0b4299a82f
1 changed files with 9 additions and 2 deletions
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11
firmware/usbstack/usb_serial.c
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@ -77,6 +77,8 @@ void usb_serial_send(unsigned char *data,int length)
{
if(!active)
return;
if(length<=0)
return;
mutex_lock(&sendlock);
if(buffer_start+buffer_length > BUFFER_SIZE)
{
@ -132,7 +134,7 @@ void usb_serial_transfer_complete(bool in, int status, int length)
}
busy_sending = false;
if(buffer_length!=0)
if(buffer_length>0)
{
sendout();
}
@ -153,8 +155,13 @@ bool usb_serial_control_request(struct usb_ctrlrequest* req)
handled = true;
/* we come here too after a bus reset, so reset some data */
mutex_lock(&sendlock);
busy_sending = false;
sendout();
if(buffer_length>0)
{
sendout();
}
mutex_unlock(&sendlock);
break;
default: