[PATCH 1/3] ARM: tegra: pcie: Add tegra3 support

[Jay Agarwal]

> >  	err = regulator_disable(pcie->pex_clk_supply);
> >  	if (err < 0)
> > -		dev_err(pcie->dev, "failed to disable pex-clk regulator:
> %d\n",
> > +		dev_warn(pcie->dev, "failed to disable pex-clk regulator:
> %d\n",
> >  			err);
> >
> >  	err = regulator_disable(pcie->vdd_supply);
> >  	if (err < 0)
> > -		dev_err(pcie->dev, "failed to disable VDD regulator: %d\n",
> > +		dev_warn(pcie->dev, "failed to disable VDD regulator:
> %d\n",
> >  			err);
> 
> Please explain why that change is correct. If the regulators only exist on
> Tegra20, please represent that fact in the SoC data. Regulators must always
> exist, so enable/disable should never fail due to missing regulators. Actual
> run-time failures seem like something that really is an error.
> 
[>] These regulators are needed for both tegra20 & tegra30. Since we are not returning error here, so changed to dev_warn.