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authorBjorn Helgaas <bhelgaas@google.com>2018-03-09 20:06:56 +0300
committerBjorn Helgaas <helgaas@kernel.org>2018-03-31 01:26:52 +0300
commit79a011194b23302dc43f265ed4237054877768ff (patch)
treecf54d9cad2a0cd0d3ed6bf6e9a889c16527d7d98 /drivers/pci/pcie/portdrv_core.c
parent3620c71484f7a19b2588e577ea732f55719f5b1f (diff)
downloadlinux-79a011194b23302dc43f265ed4237054877768ff.tar.xz
PCI/portdrv: Disable port driver in compat mode
The "pcie_ports=compat" kernel parameter sets pcie_ports_disabled, which is intended to disable the PCIe port driver. But even when it was disabled, we registered pcie_portdriver so we could work around a BIOS PME issue (see fe31e69740ed ("PCI/PCIe: Clear Root PME Status bits early during system resume")). Registering the driver meant that the pcie_portdrv_probe() path called pci_enable_device(), pci_save_state(), pm_runtime_set_autosuspend_delay(), pm_runtime_use_autosuspend(), etc., even when the driver was disabled. We've since moved the BIOS PME workaround from the port driver to the core, so stop registering the PCIe port driver in compat mode. This means "pcie_ports=compat" will now be basically the same as turning off CONFIG_PCIEPORTBUS completely. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/pci/pcie/portdrv_core.c')
-rw-r--r--drivers/pci/pcie/portdrv_core.c3
1 files changed, 0 insertions, 3 deletions
diff --git a/drivers/pci/pcie/portdrv_core.c b/drivers/pci/pcie/portdrv_core.c
index 4268b2fc2c7a..9a41751db332 100644
--- a/drivers/pci/pcie/portdrv_core.c
+++ b/drivers/pci/pcie/portdrv_core.c
@@ -211,9 +211,6 @@ static int get_port_device_capability(struct pci_dev *dev)
int services = 0;
int cap_mask = 0;
- if (pcie_ports_disabled)
- return 0;
-
cap_mask = PCIE_PORT_SERVICE_PME | PCIE_PORT_SERVICE_HP
| PCIE_PORT_SERVICE_VC;
if (pci_aer_available())