[PATCH] PCI: keystone: add a pci quirk to limit mrrs

[Jason Gunthorpe]

On Wed, Aug 06, 2014 at 11:18:20AM -0400, Murali Karicheri wrote:
> Keystone PCI controller has a limitation that memory read request
> size must not exceed 256 bytes. This is a hardware limitation and
> add a quirk to force this limit on all downstream devices by
> updating mrrs.

Does this still work if the tuning is enabled, or does the tuning run
after this?

> +			if (pcie_get_readrq(dev) > 256) {
> +				pr_info("limiting mrrs to 256\n");
> +				pcie_set_readrq(dev, 256);

The pr_info should either go away, or at least print the PCI bdf..

Jason