linux

iv/linux

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Bjorn Helgaas 3facf1adb9 PCI/PTM: Inherit Switch Downstream Port PTM settings from Upstream Port

[ Upstream commit 7b38fd9760f51cc83d80eed2cfbde8b5ead9e93a ]

Except for Endpoints, we enable PTM at enumeration-time.  Previously we did
not account for the fact that Switch Downstream Ports are not permitted to
have a PTM capability; their PTM behavior is controlled by the Upstream
Port (PCIe r5.0, sec 7.9.16).  Since Downstream Ports don't have a PTM
capability, we did not mark them as "ptm_enabled", which meant that
pci_enable_ptm() on an Endpoint failed because there was no PTM path to it.

Mark Downstream Ports as "ptm_enabled" if their Upstream Port has PTM
enabled.

Fixes: eec097d43100 ("PCI: Add pci_enable_ptm() for drivers to enable PTM on endpoints")
Reported-by: Aditya Paluri <Venkata.AdityaPaluri@synopsys.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2020-06-30 15:38:26 -04:00

host

PCI: rcar: Fix incorrect programming of OB windows

2020-06-30 15:38:24 -04:00

hotplug

PCI: rpadlpar: Fix leaked device_node references in add/remove paths

2019-06-22 08:17:16 +02:00

pcie

PCI/PTM: Inherit Switch Downstream Port PTM settings from Upstream Port

2020-06-30 15:38:26 -04:00

access.c

PCI: Avoid possible deadlock on pci_lock and p->pi_lock