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From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 87591] Host will call trace when loading igbvf.
Date: Mon, 03 Nov 2014 01:59:47 +0000
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https://bugzilla.kernel.org/show_bug.cgi?id=87591
--- Comment #1 from Zhou, Chao ---
the first bad commit is:
commit 6cd33649fa83d97ba7b66f1d871a360e867c5220
Author: Bjorn Helgaas
Date: Wed Aug 27 14:29:47 2014 -0600
PCI: Add pci_configure_device() during enumeration
Some platforms can tell the OS how to configure PCI devices, e.g., how to
set cache line size, error reporting enables, etc. ACPI defines _HPP and
_HPX methods for this purpose.
This configuration was previously done by some of the hotplug drivers using
pci_configure_slot(). But not all hotplug drivers did this, and per the
spec (ACPI rev 5.0, sec 6.2.7), we can also do it for "devices not
configured by the BIOS at system boot."
Move this configuration into the PCI core by adding pci_configure_device()
and calling it from pci_device_add(), so we do this for all devices as we
enumerate them.
This is based on pci_configure_slot(), which is used by hotplug drivers.
I omitted:
- pcie_bus_configure_settings() because it configures MPS and MRRS, which
requires global knowledge of the fabric and must be done later, and
- configuration of subordinate devices; that will happen when we call
pci_device_add() for those devices.
Because pci_configure_slot() was only done by hotplug drivers, this initial
version of pci_configure_device() only configures hot-added devices,
ignoring anything added during boot.
Signed-off-by: Bjorn Helgaas
Acked-by: Yinghai Lu
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