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| author | Lukas Wunner <lukas@wunner.de> | 2018-07-19 17:27:43 -0500 |
|---|---|---|
| committer | Bjorn Helgaas <helgaas@kernel.org> | 2018-07-23 17:04:14 -0500 |
| commit | 774d446b0f9222f46772dde8770d7c1c169c0284 (patch) | |
| tree | ccc8d8e53605b76fb8316da188787ebe08414e46 /drivers/pci/hotplug | |
| parent | 51bbf9bee34ff5d4006d266f24a54dc9c1669eb5 (diff) | |
| download | linux-774d446b0f9222f46772dde8770d7c1c169c0284.tar.gz linux-774d446b0f9222f46772dde8770d7c1c169c0284.tar.bz2 linux-774d446b0f9222f46772dde8770d7c1c169c0284.zip | |
PCI: pciehp: Publish to user space last on probe
The PCI hotplug core has just been refactored to separate slot
initialization for in-kernel use from publication to user space.
Take advantage of it in pciehp by publishing to user space last on
probe. This will allow enable/disablement of the slot exclusively from
the IRQ thread because the IRQ is requested after initialization for
in-kernel use (thereby getting its unique name needed by the IRQ thread)
but before user space is able to submit enable/disable requests.
On teardown, the order is the same in reverse: The user space interface
is removed prior to freeing the IRQ and destroying the slot.
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci/hotplug')
| -rw-r--r-- | drivers/pci/hotplug/pciehp_core.c | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/drivers/pci/hotplug/pciehp_core.c b/drivers/pci/hotplug/pciehp_core.c index 37d8f81e548f..cde32e137f6c 100644 --- a/drivers/pci/hotplug/pciehp_core.c +++ b/drivers/pci/hotplug/pciehp_core.c @@ -100,10 +100,10 @@ static int init_slot(struct controller *ctrl) slot->hotplug_slot = hotplug; snprintf(name, SLOT_NAME_SIZE, "%u", PSN(ctrl)); - retval = pci_hp_register(hotplug, - ctrl->pcie->port->subordinate, 0, name); + retval = pci_hp_initialize(hotplug, + ctrl->pcie->port->subordinate, 0, name); if (retval) - ctrl_err(ctrl, "pci_hp_register failed: error %d\n", retval); + ctrl_err(ctrl, "pci_hp_initialize failed: error %d\n", retval); out: if (retval) { kfree(ops); @@ -117,7 +117,7 @@ static void cleanup_slot(struct controller *ctrl) { struct hotplug_slot *hotplug_slot = ctrl->slot->hotplug_slot; - pci_hp_deregister(hotplug_slot); + pci_hp_destroy(hotplug_slot); kfree(hotplug_slot->ops); kfree(hotplug_slot->info); kfree(hotplug_slot); @@ -231,8 +231,15 @@ static int pciehp_probe(struct pcie_device *dev) goto err_out_free_ctrl_slot; } - /* Check if slot is occupied */ + /* Publish to user space */ slot = ctrl->slot; + rc = pci_hp_add(slot->hotplug_slot); + if (rc) { + ctrl_err(ctrl, "Publication to user space failed (%d)\n", rc); + goto err_out_shutdown_notification; + } + + /* Check if slot is occupied */ pciehp_get_adapter_status(slot, &occupied); pciehp_get_power_status(slot, &poweron); if (occupied && pciehp_force) @@ -243,6 +250,8 @@ static int pciehp_probe(struct pcie_device *dev) return 0; +err_out_shutdown_notification: + pcie_shutdown_notification(ctrl); err_out_free_ctrl_slot: cleanup_slot(ctrl); err_out_release_ctlr: @@ -254,6 +263,7 @@ static void pciehp_remove(struct pcie_device *dev) { struct controller *ctrl = get_service_data(dev); + pci_hp_del(ctrl->slot->hotplug_slot); pcie_shutdown_notification(ctrl); cleanup_slot(ctrl); pciehp_release_ctrl(ctrl); |