From: Jean-Philippe Brucker jean-philippe.brucker@arm.com
commit 6302bf3ef78dd210b5ff4a922afcb7d8eff8a211 upstream.
Two functions allocate a host bridge: devm_pci_alloc_host_bridge() and pci_alloc_host_bridge(). At the moment, only the unmanaged one initializes the PCIe feature bits, which prevents from using features such as hotplug or AER on some systems, when booting with device tree. Make the initialization code common.
Fixes: 02bfeb484230 ("PCI/portdrv: Simplify PCIe feature permission checking") Signed-off-by: Jean-Philippe Brucker jean-philippe.brucker@arm.com Signed-off-by: Bjorn Helgaas bhelgaas@google.com CC: stable@vger.kernel.org # v4.17+ Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/pci/probe.c | 23 ++++++++++++++--------- 1 file changed, 14 insertions(+), 9 deletions(-)
--- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -535,16 +535,9 @@ static void pci_release_host_bridge_dev( kfree(to_pci_host_bridge(dev)); }
-struct pci_host_bridge *pci_alloc_host_bridge(size_t priv) +static void pci_init_host_bridge(struct pci_host_bridge *bridge) { - struct pci_host_bridge *bridge; - - bridge = kzalloc(sizeof(*bridge) + priv, GFP_KERNEL); - if (!bridge) - return NULL; - INIT_LIST_HEAD(&bridge->windows); - bridge->dev.release = pci_release_host_bridge_dev;
/* * We assume we can manage these PCIe features. Some systems may @@ -557,6 +550,18 @@ struct pci_host_bridge *pci_alloc_host_b bridge->native_shpc_hotplug = 1; bridge->native_pme = 1; bridge->native_ltr = 1; +} + +struct pci_host_bridge *pci_alloc_host_bridge(size_t priv) +{ + struct pci_host_bridge *bridge; + + bridge = kzalloc(sizeof(*bridge) + priv, GFP_KERNEL); + if (!bridge) + return NULL; + + pci_init_host_bridge(bridge); + bridge->dev.release = pci_release_host_bridge_dev;
return bridge; } @@ -571,7 +576,7 @@ struct pci_host_bridge *devm_pci_alloc_h if (!bridge) return NULL;
- INIT_LIST_HEAD(&bridge->windows); + pci_init_host_bridge(bridge); bridge->dev.release = devm_pci_release_host_bridge_dev;
return bridge;