[PATCH] usb: gadget: aspeed_udc: fix handling of tx_len == 0

[Dan Carpenter]

On Thu, Jun 23, 2022 at 09:43:20AM +0300, Dan Carpenter wrote:
> On Thu, Jun 23, 2022 at 01:41:49AM +0000, Neal Liu wrote:
> > > The bug is that we should still enter this loop if "tx_len" is zero.
> > > 
> > > After adding the "last" variable, then the "chunk >= 0" condition is no longer
> > > required but I left it for readability.
> > > 
> > 
> > Use either "chunk >=0" or "last".
> > I think the former is more simpler.
> 
> chunk >= 0 doesn't work.  last works but I think this way is more
> readable.

Fine, I can remove the chunk >= 0.  But you can see why your idea of
removing the "last" doesn't work, right?  I mean maybe it does work and
there was a bug in the original code?  Could you please look at that so
we're for sure writing correct code?

regards,
dan carpenter