On Friday, May 22, 2015 04:44:16 PM Bjorn Helgaas wrote: > [+cc Lorenzo, tiagdtd-lava] > > On Wed, May 20, 2015 at 02:14:13AM +0200, Rafael J. Wysocki wrote: > > From: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx> > > > > If the ignore_hotplug flag is set for a PCI device without an ACPI > > companion and a bus check notification is received for an ancestor > > bridge that is not the device's parent, ACPIPHP will ignore that > > flag. > > > > Namely, in that case acpiphp_check_bridge() is called for the target > > bridge and if all of the devices immediately below the bridge are > > still present, trim_stale_devices() will be called for each of them. > > That function recursively walks the hierarchy downwards and removes > > device objects corresponding to devices that don't appear to be > > present any more. Unfortunately, it only checks ignore_hotplug > > for devices having ACPI companions, so it will remove the others > > (if they don't respond) regardless of the ignore_hotplug value. > > > > Fix the problem by making trim_stale_devices() take ignore_hotplug > > into consideration regardless of whether or not an ACPI companion > > is present for the device it has been called for. > > > > Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx> > > Applied to pci/hotplug for v4.2, thanks! > > I cc'd Lorenzo and tiagdtd-lava in hopes they can test this patch and see > whether it resolves https://bugzilla.kernel.org/show_bug.cgi?id=61891 . > > The branch with this patch applied is here: > https://git.kernel.org/cgit/linux/kernel/git/helgaas/pci.git/log/?h=pci/hotplug Thanks! -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
