Kuppuswamy Sathyanarayanan 1a2a0d5b06 PCI/EDR: Clear Device Status after EDR error recovery ... [ Upstream commit c441b1e03d ] During EDR recovery, the OS must clear error status of the port that triggered DPC even if firmware retains control of DPC and AER (see the implementation note in the PCI Firmware spec r3.3, sec 4.6.12). Prior to 068c29a248 ("PCI/ERR: Clear PCIe Device Status errors only if OS owns AER"), the port Device Status was cleared in this path: edr_handle_event dpc_process_error(dev) # "dev" triggered DPC pcie_do_recovery(dev, dpc_reset_link) dpc_reset_link # exit DPC pcie_clear_device_status(dev) # clear Device Status After 068c29a248, pcie_do_recovery() no longer clears Device Status when firmware controls AER, so the error bit remains set even after recovery. Per the "Downstream Port Containment configuration control" bit in the returned _OSC Control Field (sec 4.5.1), the OS is allowed to clear error status until it evaluates _OST, so clear Device Status in edr_handle_event() if the error recovery was successful. [bhelgaas: commit log] Fixes: 068c29a248 ("PCI/ERR: Clear PCIe Device Status errors only if OS owns AER") Link: https://lore.kernel.org/r/20230315235449.1279209-1-sathyanarayanan.kuppuswamy@linux.intel.com Reported-by: Tsaur Erwin <erwin.tsaur@intel.com> Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2023-05-11 23:00:32 +09:00
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controller	PCI: imx6: Install the fault handler only on compatible match	2023-05-11 23:00:32 +09:00
endpoint	PCI: pci-epf-test: Register notifier if only core_init_notifier is enabled	2022-12-31 13:14:22 +01:00
hotplug	PCI: pciehp: Fix AB-BA deadlock between reset_lock and device_lock	2023-05-11 23:00:15 +09:00
pcie	PCI/EDR: Clear Device Status after EDR error recovery	2023-05-11 23:00:32 +09:00
switch	PCI: switchtec: Return -EFAULT for copy_to_user() errors	2023-03-10 09:39:37 +01:00
access.c
ats.c
bus.c	PCI: s390: Fix use-after-free of PCI resources with per-function hotplug	2023-03-22 13:31:24 +01:00
ecam.c
host-bridge.c
iov.c	PCI/IOV: Enlarge virtfn sysfs name buffer	2023-03-10 09:39:37 +01:00
irq.c	PCI: Check for alloc failure in pci_request_irq()	2022-12-31 13:14:24 +01:00
Kconfig
Makefile
mmap.c
msi.c
of.c
p2pdma.c	memremap: remove support for external pgmap refcounts	2022-08-17 14:23:43 +02:00
pci-acpi.c
pci-bridge-emul.c
pci-bridge-emul.h
pci-driver.c	PCI: Unify delay handling for reset and resume	2023-03-22 13:31:37 +01:00
pci-label.c
pci-mid.c
pci-pf-stub.c
pci-stub.c
pci-sysfs.c	PCI/sysfs: Fix double free in error path	2023-01-12 11:58:58 +01:00
pci.c	PCI/ASPM: Remove pcie_aspm_pm_state_change()	2023-05-01 08:23:23 +09:00
pci.h	PCI/ASPM: Remove pcie_aspm_pm_state_change()	2023-05-01 08:23:23 +09:00
probe.c
proc.c
quirks.c	PCI: Add ACS quirk for Wangxun NICs	2023-03-11 13:57:38 +01:00
remove.c
rom.c
search.c
setup-bus.c	PCI: Take other bus devices into account when distributing resources	2023-03-11 13:57:37 +01:00
setup-irq.c
setup-res.c	PCI: Sanitise firmware BAR assignments behind a PCI-PCI bridge	2022-10-26 12:34:24 +02:00
slot.c
syscall.c
vc.c
vpd.c
xen-pcifront.c