PCI: Stop over-estimating bridge window size

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New way to calculate the bridge window head alignment produces tight-fit,
that is, it does not leave any gaps between the resources.  Similarly,
relaxed tail alignment does not leave extra tail room.

Start to use bridge window calculation that does not over-estimate the size
of the required window.

pbus_upstream_space_available() can be removed.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: Malte Schröder <malte+lkml@tnxip.de>
Link: https://patch.msgid.link/20251219174036.16738-4-ilpo.jarvinen@linux.intel.com

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Ilpo Järvinen 2025-12-19 19:40:16 +02:00 • committed by Bjorn Helgaas

parent bc75c8e507

commit 3958bf16e2

1 changed files with 5 additions and 92 deletions

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drivers/pci/setup-bus.c

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