[PATCH] pci: Add checks to prevent config space overflow

[Tom Rini]

On Sun, Jul 03, 2022 at 12:48:06PM +0200, Pali Rohár wrote:

> PCIe config space has address range 0-4095. So do not allow reading from
> addresses outside of this range. Lot of U-Boot drivers do not expect that
> passed value is not in this range. PCI DM read function is extended to
> fill read value to all ones or zeros when it fails as U-Boot callers
> ignores return value.
> 
> Calling U-Boot command 'pci display.b 0.0.0 0 0x2000' now stops printing
> config space at the end (before 0x1000 address).
> 
> Signed-off-by: Pali Rohár <pali at kernel.org>
> Reviewed-by: Stefan Roese <sr at denx.de>

Applied to u-boot/master, thanks!

-- 
Tom
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