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SubjectRe: [PATCH] PCI: tegra: Use PTR_ERR_OR_ZERO
On Tue, Aug 29, 2017 at 07:44:01PM +0530, Himanshu Jha wrote:
> On Tue, Aug 29, 2017 at 03:55:17PM +0200, Thierry Reding wrote:
> > On Tue, Aug 29, 2017 at 07:09:00PM +0530, Himanshu Jha wrote:
> > > Use PTR_ERR_OR_ZERO rather than if(IS_ERR(...)) + PTR_ERR
> > >
> > > Signed-off-by: Himanshu Jha <himanshujha199640@gmail.com>
> > > ---
> > > drivers/pci/host/pci-tegra.c | 5 +----
> > > 1 file changed, 1 insertion(+), 4 deletions(-)
> > >
> > > diff --git a/drivers/pci/host/pci-tegra.c b/drivers/pci/host/pci-tegra.c
> > > index 9c40da5..90cda5b 100644
> > > --- a/drivers/pci/host/pci-tegra.c
> > > +++ b/drivers/pci/host/pci-tegra.c
> > > @@ -1156,10 +1156,7 @@ static int tegra_pcie_resets_get(struct tegra_pcie *pcie)
> > > return PTR_ERR(pcie->afi_rst);
> > >
> > > pcie->pcie_xrst = devm_reset_control_get_exclusive(dev, "pcie_x");
> > > - if (IS_ERR(pcie->pcie_xrst))
> > > - return PTR_ERR(pcie->pcie_xrst);
> > > -
> > > - return 0;
> > > + return PTR_ERR_OR_ZERO(pcie->pcie_xrst);
> > > }
> >
> > I'm not a big fan of this construct because it's a pain to undo this if
> > ever we need to add code to this function. But since we do have scripts
> > that will flag this, I guess this would pop up every now and again. The
> > driver is unlikely to change in this part, too, so:
>
> What do you suggest ? Shall I stop sending these patches ?

No, it's fine. I'm just saying that there are cases where this doesn't
make sense. In this case I think it's fine because the driver is fairly
mature and unlikely to change, so there is not a lot of potential for
churn later on. In other cases, use your best judgement.

Ultimately it is up to maintainers whether or not they apply this kind
of patch.

Thierry
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