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SubjectRe: [PATCH] usb: dwc3: be more verbose on ERRATIC_ERROR interrupt
On Wed, Oct 15, 2014 at 12:00:22AM -0500, Felipe Balbi wrote:
> Hi,
>
> On Tue, Oct 14, 2014 at 01:15:05PM -0700, David Cohen wrote:
> > ERRATIC_ERROR interrupt is an event that needs more attention from
> > developers than currently implemented, since this indicates a serious
> > stability issue. The only way to get warned about it is by selecting the
> > maximum driver's verbosity.
> >
> > This patch increases a bit the error's verbosity.
> >
> > Signed-off-by: David Cohen <david.a.cohen@linux.intel.com>
> > ---
> > drivers/usb/dwc3/gadget.c | 3 ++-
> > 1 file changed, 2 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
> > index 3818b26bfc05..132e761d62e4 100644
> > --- a/drivers/usb/dwc3/gadget.c
> > +++ b/drivers/usb/dwc3/gadget.c
> > @@ -2484,7 +2484,8 @@ static void dwc3_gadget_interrupt(struct dwc3 *dwc,
> > dev_vdbg(dwc->dev, "Start of Periodic Frame\n");
> > break;
> > case DWC3_DEVICE_EVENT_ERRATIC_ERROR:
> > - dev_vdbg(dwc->dev, "Erratic Error\n");
> > + WARN_ON_ONCE(1);
> > + dev_dbg(dwc->dev, "Erratic Error\n");
>
> how about:
> WARN_ONCE(true, "Erratic Error\n");
>
> instead ?

When erratic error event happens, in my experience it is usually
followed but many of them in a row. It may end up too verbose.

Br, David

>
> > break;
> > case DWC3_DEVICE_EVENT_CMD_CMPL:
> > dev_vdbg(dwc->dev, "Command Complete\n");
> > --
> > 2.1.0
> >
>
> --
> balbi




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