Hello, Sergei,
> > From: "Du, Changbin" <changbin...@intel.com>
> >
> > For DWC3 USB controller, the Global Debug Queue/FIFO Space Available
> > Register(GDBGFIFOSPACE) can be used to dump FIFO/Queue available
> space.
>
> Space needed before (.
Okay.
>
> > This can be used to check some special issues, like whether data is
> > successfully copied from memory to fifo when a trb is blocked.
> >
> > Signed-off-by: Du, Changbin <changbin...@intel.com>
> > ---
> > v4:
> > Do not fail silently, but print error.
> [...]
> > diff --git a/drivers/usb/dwc3/debugfs.c b/drivers/usb/dwc3/debugfs.c
> > index 615d4dc..83e5bc1 100644
> > --- a/drivers/usb/dwc3/debugfs.c
> > +++ b/drivers/usb/dwc3/debugfs.c
> [...]
> > @@ -642,10 +681,15 @@ void dwc3_debugfs_init(struct dwc3 *dwc)
> > dwc->regset->nregs = ARRAY_SIZE(dwc3_regs);
> > dwc->regset->base = dwc->regs;
> >
> > +
>
> Why?
Thanks for point out, I will remove this additional line.
>
> > file = debugfs_create_regset32("regdump", S_IRUGO, root, dwc-
> >regset);
> > if (!file)
> > dev_err(dwc->dev, "Can't create debugfs regdump\n");
> >
> > + file = debugfs_create_file("fifo", S_IRUGO, root, dwc,
> &dwc3_fifo_fops);
> > + if (!file)
> > + dev_err(dwc->dev, "Can't create debugfs fifo\n");
> > +
> > if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE)) {
> > file = debugfs_create_file("mode", S_IRUGO | S_IWUSR,
> root,
> > dwc, &dwc3_mode_fops);
>
> MBR, Sergei
