Reference in a new issue

Blame

Copy permalink

Reference in a new issue

Copy permalink

Kai-Heng Feng 96f42087b0 PCI: Validate window resource type in pbus_select_window_for_type() ...

[ Upstream commit e5f72cb9ce ]

After ebe091ad81 ("PCI: Use pbus_select_window_for_type() during IO
window sizing") and ae88d0b9c5 ("PCI: Use pbus_select_window_for_type()
during mem window sizing"), many bridge windows can't get resources
assigned:

  pci 0006:05:00.0: bridge window [??? 0x00001000-0x00001fff flags 0x20080000]: can't assign; no space
  pci 0006:05:00.0: bridge window [??? 0x00001000-0x00001fff flags 0x20080000]: failed to assign

Those commits replace find_bus_resource_of_type() with
pbus_select_window_for_type(), and the latter lacks resource type
validation.

Add the resource type validation back to pbus_select_window_for_type() to
match the original behavior.

Fixes: 74afce3dfc ("PCI: Add bridge window selection functions")
Link: https://bugzilla.kernel.org/show_bug.cgi?id=221072
Signed-off-by: Kai-Heng Feng <kaihengf@nvidia.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://patch.msgid.link/20260210142058.82701-1-kaihengf@nvidia.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

2026-02-26 14:59:43 -08:00

2488 lines

64 KiB

Raw Permalink Blame History