Re: [PATCH] PCI: Check for PCIe downtraining conditions

[Pavel Machek]

On Thu 2018-05-31 10:05:33, Alexandru Gagniuc wrote:
> PCIe downtraining happens when both the device and PCIe port are
> capable of a larger bus width or higher speed than negotiated.
> Downtraining might be indicative of other problems in the system, and
> identifying this from userspace is neither intuitive, nor straigh
> forward.
> Instead, check for such conditions on device probe, and print an
> appropriate message.
> 

> +	if (dev_cur_width < max_link_width) {
> +		/* Lanes might not be routed, so use info instead of warn. */
> +		pci_info(dev, "PCIe downtrain: Port and device capable of x%d, but link running at x%d",
> +			 max_link_width, dev_cur_width);
> +	}

Would "warn" be right loglevel?
									Pavel
									
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