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author | Lukas Wunner <lukas@wunner.de> | 2016-10-28 10:52:06 +0200 |
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committer | Bjorn Helgaas <bhelgaas@google.com> | 2016-11-17 18:44:56 -0600 |
commit | 1ed276a7b9d84626e5243fc54863440c74a4100a (patch) | |
tree | 6fa65a3a3c7125f6574f25bf37576b29f373f3ab /drivers/pci/remove.c | |
parent | 738a7edbfc7b623e276686dead046c9f3aae6b2e (diff) | |
download | linux-1ed276a7b9d84626e5243fc54863440c74a4100a.tar.gz |
PCI: Autosense device removal in pci_bridge_d3_update()
The algorithm to update the flag indicating whether a bridge may go to D3 makes a few optimizations based on whether the update was caused by the removal of a device on the one hand, versus the addition of a device or the change of its D3cold flags on the other hand. The information whether the update pertains to a removal is currently passed in by the caller, but the function may as well determine that itself by examining the device in question, thereby allowing for a considerable simplification and reduction of the code. Out of several options to determine removal, I've chosen the function device_is_registered() because it's cheap: It merely returns the dev->kobj.state_in_sysfs flag. That flag is set through device_add() when the root bus is scanned and cleared through device_remove(). The call to pci_bridge_d3_update() happens after each of these calls, respectively, so the ordering is correct. No functional change intended. Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Lukas Wunner <lukas@wunner.de> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/pci/remove.c')
-rw-r--r-- | drivers/pci/remove.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/pci/remove.c b/drivers/pci/remove.c index f9357e09e9b3..73a03d382590 100644 --- a/drivers/pci/remove.c +++ b/drivers/pci/remove.c @@ -40,7 +40,7 @@ static void pci_destroy_dev(struct pci_dev *dev) list_del(&dev->bus_list); up_write(&pci_bus_sem); - pci_bridge_d3_device_removed(dev); + pci_bridge_d3_update(dev); pci_free_resources(dev); put_device(&dev->dev); } |