Re: [PATCH 1/2] pinctrl: mvebu: armada-37xx: use use platform api
From: Uwe Kleine-König
Date: Wed Jan 08 2020 - 02:52:58 EST
Hello Fabio,
On Wed, Dec 18, 2019 at 12:09:42PM -0300, Fabio Estevam wrote:
> On Wed, Dec 18, 2019 at 12:00 PM Andrew Lunn <andrew@xxxxxxx> wrote:
>
> > Hi Fabio
> >
> > Look closer. This is not about returning an error, it is about
> > printing an error.
> >
> > I think the API could better. A %ie formatter would make a lot of
> > sense, so avoiding the ERR_PTR().
>
> Yes, I think that returning the error like:
>
> dev_err(dev, "Couldn't determine irq count: %d\n", nr_irq_parent);
>
> would make the code cleaner.
Are you aware of the semantic difference between
dev_err(..., "Couldn't determine irq count: %d\n", nr_irq_parent);
and
dev_err(..., "Couldn't determine irq count: %pe\n", ERR_PTR(nr_irq_parent));
? The first yields:
Couldn't determine irq count: -5
while the latter yields
Couldn't determine irq count: -EIO
which is more expressive.
I agree that having a format for printing an integer error code would be
useful. I have this on my todo-list but having some %pe with ERR_PTR
conversion would help me arguing my case.
So I would like the patch to go in with ERR_PTR even though v2 was sent
using %d today.
Best regards
Uwe
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