Am Donnerstag, den 20.04.2017, 10:32 +0200 schrieb Bjørn Mork:
> > @@ -189,7 +192,13 @@ static void wdm_in_callback(struct urb *urb)
> > }
> > }
> >
> > - desc->rerr = status;
> > + /*
> > + * only set a new error if there is no previous error.
> > + * Errors are only cleared during read/open
> > + */
> > + if (desc->rerr == 0)
> > + desc->rerr = status;
> > +
> > if (length + desc->length > desc->wMaxCommand) {
> > /* The buffer would overflow */
> > set_bit(WDM_OVERFLOW, &desc->flags);
> >
>
>
> This is minor, but in my opinion this change is flawed. It changes the
> meaning of "desc->rerr" from the original "last status code" to the new
> "first error since last userspace read".
Indeed. And that will preserve the initial cause of the problem better.
We could run into the zero length read case. Are you sure you want the
old behavior back?
Regards
Oliver
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