linux-kernel - Re: [RESEND PATCH V1 4/5] PCI: tegra: Don't allow suspend when Tegra PCIe is in EP mode

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Message-ID: <20210527210021.GA32109@rocinante.localdomain>
Date:   Thu, 27 May 2021 23:00:21 +0200
From:   Krzysztof Wilczyński <kw@...ux.com>
To:     Om Prakash Singh <omp@...dia.com>
Cc:     vidyas@...dia.com, lorenzo.pieralisi@....com, bhelgaas@...gle.com,
        thierry.reding@...il.com, jonathanh@...dia.com,
        linux-tegra@...r.kernel.org, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org, kthota@...dia.com,
        mmaddireddy@...dia.com
Subject: Re: [RESEND PATCH V1 4/5] PCI: tegra: Don't allow suspend when Tegra
 PCIe is in EP mode

Hi,

> > +	if (pcie->mode == DW_PCIE_EP_TYPE) {
> > +		dev_err(dev, "Tegra PCIe is in EP mode, suspend not allowed");
> > +		return -EPERM;
> > +	}
> 
> Would the -EINVAL be more appropriate here?  It seem more appropriate
> when something is an invalid operation, rather than access to the
> resource being denied (or something along these lines), what do you
> think?

After looking at this again, perhaps -ENOTSUPP would be a better fit,
and then the message could say that the suspend is not supported.

	Krzysztof