On Fri, Mar 15, 2013 at 04:26:10PM +0800, victor yeo wrote: > Hi, > > > On Fri, Mar 15, 2013 at 01:59:30PM +0800, victor yeo wrote: > >> For bulk transfer, the new UDC driver has one problem. When SCSI > >> Inquiry command is received, the UDC driver interrupt routine will > >> receive it first. However, the queue function is not yet called, and > >> queue buffer is not yet added. Thus, interrupt routine is not able to > >> store the SCSI Inquiry command to the queue buffer. > >> > >> This is a serious problem, what is the way to synchronise UDC driver > >> and file storage gadget driver for SCSI command bulk transfer? > > > > don't process the interrupt until you receive a queue. Data will be > > pending in controller's FIFO until then. > > > > change to do exactly that, bulk transfer interrupt come in, don't > process, then queue function is called to add queue buffer. After > that, no more bulk transfer interrupt come in. did you process the pending data from FIFO after queue was called ? -- balbi
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