在 2020-07-08星期三的 12:03 +0100，Russell King - ARM Linux admin写道：
> On Wed, Jul 08, 2020 at 12:55:27PM +0200, Ondrej Jirman wrote:
> > I noticed several mobile Linux distributions failing to enable the
> > thermal regulation correctly, because the kernel is silent
> > when thermal driver fails to probe. Add enough error reporting
> > to debug issues and warn users in case thermal sensor is failing
> > to probe.
> >
> > Failing to notify users means, that SoC can easily overheat under
> > load.
> >
> > Signed-off-by: Ondrej Jirman <meg...@megous.com>
> > ---
> > drivers/thermal/sun8i_thermal.c | 55 ++++++++++++++++++++++++++---
> > ----
> > 1 file changed, 43 insertions(+), 12 deletions(-)
> >
> > diff --git a/drivers/thermal/sun8i_thermal.c
> > b/drivers/thermal/sun8i_thermal.c
> > index 74d73be16496..9065e79ae743 100644
> > --- a/drivers/thermal/sun8i_thermal.c
> > +++ b/drivers/thermal/sun8i_thermal.c
> > @@ -287,8 +287,12 @@ static int sun8i_ths_calibrate(struct
> > ths_device *tmdev)
> >
> > calcell = devm_nvmem_cell_get(dev, "calibration");
> > if (IS_ERR(calcell)) {
> > + dev_err(dev, "Failed to get calibration nvmem cell
> > (%ld)\n",
> > + PTR_ERR(calcell));
>
> Consider using:
>
> dev_err(dev, "Failed to get calibration nvmem cell
> (%pe)\n",
> calcell);
>
> which means the kernel can print the symbolic errno value.
Oh interesting format here.
When we need to deal with a int return value, is it "%e"?
Thanks
>
