Hi Krzysztof,

Thanks for your review,

On Wed, 2021-02-24 at 15:10 +0100, Krzysztof Wilczyński wrote:

Hi Jianjun,

quoted

Add suspend_noirq and resume_noirq callback functions to implement
PM system suspend hooks for MediaTek Gen3 PCIe controller.

So, "systems suspend" and "resume" hooks, correct?

The callback functions is suspend_noirq and resume_noirq, should I use
"systems suspend" and "resume" in the commit message?

quoted

When system suspend, trigger the PCIe link to L2 state and pull down

It probably would be "the system suspends".

[...]

quoted

When system resum, the PCIe link should be re-established and the
related control register values should be restored.

Similarly to the above: "the system resumes".

[...]

quoted

+	if (err) {
+		dev_err(port->dev, "can not enter L2 state\n");
+		return err;
+	}

Most likely you want "cannot" or "can't" in the above error message.

quoted

+	/* Pull down the PERST# pin */
+	val = readl_relaxed(port->base + PCIE_RST_CTRL_REG);
+	val |= PCIE_PE_RSTB;
+	writel_relaxed(val, port->base + PCIE_RST_CTRL_REG);
+
+	dev_dbg(port->dev, "enter L2 state success");

Just a nitpick.  What about "entered L2 states successfully"?

[...]

quoted

+	if (err) {
+		dev_err(port->dev, "resume failed\n");
+		return err;
+	}

This error message does not quite convey that the mtk_pcie_startup_port()
was the function that failed, which is only a part of what you have to do
to successfully resume.

quoted

+	dev_dbg(port->dev, "resume done\n");

A nitpick.  Probably not needed, as lack of error message would mean
that the device resumed successfully after being suspended.

Krzysztof

Thanks.