linux-kernel - Regression: pci=realloc fails to modify bridge windows, causing devices to fail BAR allocation

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Message-ID: <53D9FADA.6020304@iam.tj>
Date:	Thu, 31 Jul 2014 09:14:18 +0100
From:	TJ <linux@....tj>
To:	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Regression: pci=realloc fails to modify bridge windows, causing devices
 to fail BAR allocation

See https://bugzilla.kernel.org/show_bug.cgi?id=81431

Summary:

Up until v3.15.7 booting with "pci=realloc,use_crs" successfully modifies the PCI bridge windows to allow an external ExpressCard <> ViDock4 + Nvidia Quadro NVS420 with its 2 GPUs to be configured.

With v3.16rc6 and rc7 it fails to do this, leaving the NVS420 inoperable.
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