From 3322340a9db2251ac9d09bc7b8d49e872298ae95 Mon Sep 17 00:00:00 2001 From: Felix Radensky Date: Sun, 28 Mar 2010 16:02:02 +0300 Subject: [PATCH] PCI: Allow manual resource allocation for PCI hotplug bridges At the moment only PCI-E briges can be flagged as hotplug, thus allowing manual resource preallocation via pci=hpmemsize=nnM and pci=hpiosize=nnM kernel parameters. Some PCI hotplug bridges, e.g. PLX 6254 can also benefit from this functionalily, as kernel fails to properly allocate their resources when hotplug device is added and PCI bus is rescanned. This patch adds header quirk for PLX 6254 that marks this bridge as hotplug. Other PCI bridges with similar problems can use it as well. Signed-off-by: Felix Radensky Signed-off-by: Jesse Barnes --- drivers/pci/quirks.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index e5861d5a2e4d..b7512cf08c58 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -2554,6 +2554,19 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x1518, quirk_i82576_sriov); #endif /* CONFIG_PCI_IOV */ +/* Allow manual resource allocation for PCI hotplug bridges + * via pci=hpmemsize=nnM and pci=hpiosize=nnM parameters. For + * some PCI-PCI hotplug bridges, like PLX 6254 (former HINT HB6), + * kernel fails to allocate resources when hotplug device is + * inserted and PCI bus is rescanned. + */ +static void __devinit quirk_hotplug_bridge(struct pci_dev *dev) +{ + dev->is_hotplug_bridge = 1; +} + +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_HINT, 0x0020, quirk_hotplug_bridge); + /* * This is a quirk for the Ricoh MMC controller found as a part of * some mulifunction chips.