On Thu, 28 Dec 2023 18:57:00 +0200 Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx> wrote: > Hi all, > > Here's a series that contains two fixes to PCI bridge window sizing > algorithm. Together, they should enable remove & rescan cycle to work > for a PCI bus that has PCI devices with optional resources and/or > disparity in BAR sizes. > > For the second fix, I chose to expose find_empty_resource_slot() from > kernel/resource.c because it should increase accuracy of the cannot-fit > decision (currently that function is called find_resource()). In order > to do that sensibly, a few improvements seemed in order to make its > interface and name of the function sane before exposing it. Thus, the > few extra patches on resource side. > > Unfortunately I don't have a reason to suspect these would help with > the issues related to the currently ongoing resource regression > thread [1]. Jonathan, can you test this series on affected machine with broken kernel to see if it's of any help in your case? > > [1] https://lore.kernel.org/linux-pci/ZXpaNCLiDM+Kv38H@xxxxxxxxxxxxxxxxxxx/ > > v2: > - Add "typedef" to kerneldoc to get correct formatting > - Use RESOURCE_SIZE_MAX instead of literal > - Remove unnecessary checks for io{port/mem}_resource > - Apply a few style tweaks from Andy > > Ilpo Järvinen (7): > PCI: Fix resource double counting on remove & rescan > resource: Rename find_resource() to find_empty_resource_slot() > resource: Document find_empty_resource_slot() and resource_constraint > resource: Use typedef for alignf callback > resource: Handle simple alignment inside __find_empty_resource_slot() > resource: Export find_empty_resource_slot() > PCI: Relax bridge window tail sizing rules > > drivers/pci/bus.c | 10 ++---- > drivers/pci/setup-bus.c | 80 +++++++++++++++++++++++++++++++++++++---- > include/linux/ioport.h | 44 ++++++++++++++++++++--- > include/linux/pci.h | 5 +-- > kernel/resource.c | 68 ++++++++++++++++------------------- > 5 files changed, 148 insertions(+), 59 deletions(-) >
