Lukas Wunner bbf10cd686 PCI: pciehp: Ignore belated Presence Detect Changed caused by DPC ... Commit c3be50f754 ("PCI: pciehp: Ignore Presence Detect Changed caused by DPC") sought to ignore Presence Detect Changed events occurring as a side effect of Downstream Port Containment. The commit awaits recovery from DPC and then clears events which occurred in the meantime. However if the first event seen after DPC is Data Link Layer State Changed, only that event is cleared and not Presence Detect Changed. The object of the commit is thus defeated. That's because pciehp_ist() computes the events to clear based on the local "events" variable instead of "ctrl->pending_events". The former contains the events that had occurred when pciehp_ist() was entered, whereas the latter also contains events that have accumulated while awaiting DPC recovery. In practice, the order of PDC and DLLSC events is arbitrary and the delay in-between can be several milliseconds. So change the logic to always clear PDC events, even if they come after an initial DLLSC event. Fixes: c3be50f754 ("PCI: pciehp: Ignore Presence Detect Changed caused by DPC") Reported-by: Lương Việt Hoàng <tcm4095@gmail.com> Reported-by: Joel Mathew Thomas <proxy0@tutamail.com> Closes: https://bugzilla.kernel.org/show_bug.cgi?id=219765#c165 Signed-off-by: Lukas Wunner <lukas@wunner.de> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Tested-by: Lương Việt Hoàng <tcm4095@gmail.com> Tested-by: Joel Mathew Thomas <proxy0@tutamail.com> Link: https://patch.msgid.link/d9c4286a16253af7e93eaf12e076e3ef3546367a.1750257164.git.lukas@wunner.de		2025-06-18 10:10:19 -05:00
..
controller	pci-v6.16-changes	2025-06-04 11:26:17 -07:00
endpoint	PCI: endpoint: Align pci_epc_set_msix(), pci_epc_ops::set_msix() nr_irqs encoding	2025-05-28 16:47:56 -05:00
hotplug	PCI: pciehp: Ignore belated Presence Detect Changed caused by DPC	2025-06-18 10:10:19 -05:00
msi	PCI/MSI: Size device MSI domain with the maximum number of vectors	2025-06-04 11:19:25 +02:00
pcie	Merge branch 'pci/ptm-debugfs'	2025-06-04 10:50:44 -05:00
pwrctrl	PCI/pwrctrl: Rename pwrctrl Kconfig symbols and slot module	2025-05-23 15:22:42 -05:00
switch
access.c
ats.c
bus.c	PCI: Limit visibility of match_driver flag to PCI core	2025-05-15 13:40:52 +00:00
devres.c	PCI: Remove redundant set of request functions	2025-05-20 07:39:15 +00:00
doe.c
ecam.c
host-bridge.c
iomap.c	PCI: Remove hybrid-devres usage warnings from kernel-doc	2025-05-20 07:39:16 +00:00
iov.c
irq.c
Kconfig	PCI: Add CONFIG_MMU dependency	2025-04-23 15:40:30 -05:00
Makefile
mmap.c
npem.c
of_property.c
of.c
p2pdma.c	PCI/P2PDMA: Refactor the p2pdma mapping helpers	2025-05-06 08:36:53 +02:00
pci-acpi.c	PCI/ACPI: Fix allocated memory release on error in pci_acpi_scan_root()	2025-05-22 11:00:03 +00:00
pci-bridge-emul.c
pci-bridge-emul.h
pci-driver.c	Merge branch 'pci/pm'	2025-06-04 10:50:01 -05:00
pci-label.c
pci-mid.c
pci-pf-stub.c
pci-stub.c
pci-sysfs.c	Merge branch 'pci/pm'	2025-06-04 10:50:01 -05:00
pci.c	PCI/PM: Set up runtime PM even for devices without PCI PM	2025-06-13 14:38:45 -05:00
pci.h	pci-v6.16-changes	2025-06-04 11:26:17 -07:00
probe.c	PCI: Limit visibility of match_driver flag to PCI core	2025-05-15 13:40:52 +00:00
proc.c
quirks.c	pci-v6.16-changes	2025-06-04 11:26:17 -07:00
remove.c
rom.c
search.c
setup-bus.c	pci-v6.16-changes	2025-06-04 11:26:17 -07:00
setup-res.c
slot.c
syscall.c
tph.c
vc.c
vgaarb.c
vpd.c
xen-pcifront.c