Re: BUG: linux 5.15.0 hang on usb_wwan_indat_callback

[qianfan <qianfanguijin@xxxxxxx>]

在 2023/4/13 21:46, Alan Stern 写道:
> On Thu, Apr 13, 2023 at 12:50:12PM +0800, qianfan wrote:
> > The resubmit logic in usb_wwan_indat_callback semms need improve:
> >
> > if (status) {
> >      dev_dbg(dev, "%s: nonzero status: %d on endpoint %02x.\n",
> >          __func__, status, endpoint);
> >
> >      /* don't resubmit on fatal errors */
> >      if (status == -ESHUTDOWN || status == -ENOENT)
> >          return;
> > }
> >
> > maybe this patch is better?
> >
> > switch (status) {
> > case -ESHOTDOWN:
> > case -ENOENT:
> > case -ECONNRESET:
> > case -EOVERFLOW:
> > case -EPROTO:
> >      reutrn;
> > }
> In fact, it would be better to treat any error you don't recognize as a
> fatal error.
I think it is a good idea.
> Alan Stern