diff options
| author | Mika Westerberg <mika.westerberg@linux.intel.com> | 2016-06-02 10:17:14 +0200 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2016-06-13 21:58:04 +0200 |
| commit | 16468c783cb4cf72475dcda23fabecb4a4bb0e17 (patch) | |
| tree | bf84679e50ed59f970140109d98e21d68a4f4a7f /drivers/pci/hotplug/acpiphp_glue.c | |
| parent | PCI: Power on bridges before scanning new devices (diff) | |
| download | linux-16468c783cb4cf72475dcda23fabecb4a4bb0e17.tar.xz linux-16468c783cb4cf72475dcda23fabecb4a4bb0e17.zip | |
ACPI / hotplug / PCI: Runtime resume bridge before rescan
If a PCI bridge (or PCIe port) that is runtime suspended gets an ACPI
hotplug event, such as BUS_CHECK we need to make sure it is resumed before
devices below the bridge are re-scanned. Otherwise the devices behind the
port are not accessible and will be treated as hot-unplugged.
To fix this, resume PCI bridges from runtime suspend while rescanning.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/pci/hotplug/acpiphp_glue.c')
| -rw-r--r-- | drivers/pci/hotplug/acpiphp_glue.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c index fa49f9143b80..6a33ddcfa20b 100644 --- a/drivers/pci/hotplug/acpiphp_glue.c +++ b/drivers/pci/hotplug/acpiphp_glue.c @@ -675,6 +675,8 @@ static void acpiphp_check_bridge(struct acpiphp_bridge *bridge) if (bridge->is_going_away) return; + pm_runtime_get_sync(&bridge->pci_dev->dev); + list_for_each_entry(slot, &bridge->slots, node) { struct pci_bus *bus = slot->bus; struct pci_dev *dev, *tmp; @@ -694,6 +696,8 @@ static void acpiphp_check_bridge(struct acpiphp_bridge *bridge) disable_slot(slot); } } + + pm_runtime_put(&bridge->pci_dev->dev); } /* |