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author | Yuji Shimada <shimada-yxb@necst.nec.co.jp> | 2009-04-03 16:41:46 +0900 |
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committer | Jesse Barnes <jbarnes@virtuousgeek.org> | 2009-04-06 11:25:06 -0700 |
commit | 296ccb086dfb89b5b8d73ef08c795ffdff12a597 (patch) | |
tree | 8c4ef0f0271e448b6843811a1bcded8c47c005a1 /include | |
parent | 7eb93b175d4de9438a4b0af3a94a112cb5266944 (diff) | |
download | op-kernel-dev-296ccb086dfb89b5b8d73ef08c795ffdff12a597.zip op-kernel-dev-296ccb086dfb89b5b8d73ef08c795ffdff12a597.tar.gz |
PCI: Setup disabled bridges even if buses are added
This patch sets up disabled bridges even if buses have already been
added.
pci_assign_unassigned_resources is called after buses are added.
pci_assign_unassigned_resources calls pci_bus_assign_resources.
pci_bus_assign_resources calls pci_setup_bridge to configure BARs of
bridges.
Currently pci_setup_bridge returns immediately if the bus have already
been added. So pci_assign_unassigned_resources can't configure BARs of
bridges that were added in a disabled state; this patch fixes the issue.
On logical hot-add, we need to prevent the kernel from re-initializing
bridges that have already been initialized. To achieve this,
pci_setup_bridge returns immediately if the bridge have already been
enabled.
We don't need to check whether the specified bus is a root bus or not.
pci_setup_bridge is not called on a root bus, because a root bus does
not have a bridge.
The patch adds a new helper function, pci_is_enabled. I made the
function name similar to pci_is_managed. The codes which use
enable_cnt directly are changed to use pci_is_enabled.
Acked-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Yuji Shimada <shimada-yxb@necst.nec.co.jp>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'include')
-rw-r--r-- | include/linux/pci.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/pci.h b/include/linux/pci.h index a7fe4bb..72698d8 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -674,6 +674,11 @@ int __must_check pci_reenable_device(struct pci_dev *); int __must_check pcim_enable_device(struct pci_dev *pdev); void pcim_pin_device(struct pci_dev *pdev); +static inline int pci_is_enabled(struct pci_dev *pdev) +{ + return (atomic_read(&pdev->enable_cnt) > 0); +} + static inline int pci_is_managed(struct pci_dev *pdev) { return pdev->is_managed; |