diff options
| author | Gavin Shan <[email protected]> | 2014-01-13 11:36:22 +0800 |
|---|---|---|
| committer | Benjamin Herrenschmidt <[email protected]> | 2014-01-15 13:58:33 +1100 |
| commit | 0c4b9e27b09eeb4da84451c038a587b92ce93ff5 (patch) | |
| tree | 89c8b8458ddc399f0e8faf0306227a1caa69cbe6 /scripts/gcc-plugins/randomize_layout_plugin.c | |
| parent | f26c7a035b7f2f1a7505ce42e4ba946b12f7df91 (diff) | |
powerpc/iommu: Don't detach device without IOMMU group
Some devices, for example PCI root port, don't have IOMMU table and
group. We needn't detach them from their IOMMU group. Otherwise, it
potentially incurs kernel crash because of referring NULL IOMMU group
as following backtrace indicates:
.iommu_group_remove_device+0x74/0x1b0
.iommu_bus_notifier+0x94/0xb4
.notifier_call_chain+0x78/0xe8
.__blocking_notifier_call_chain+0x7c/0xbc
.blocking_notifier_call_chain+0x38/0x48
.device_del+0x50/0x234
.pci_remove_bus_device+0x88/0x138
.pci_stop_and_remove_bus_device+0x2c/0x40
.pcibios_remove_pci_devices+0xcc/0xfc
.pcibios_remove_pci_devices+0x3c/0xfc
Signed-off-by: Gavin Shan <[email protected]>
Reviewed-by: Alexey Kardashevskiy <[email protected]>
Signed-off-by: Benjamin Herrenschmidt <[email protected]>
Diffstat (limited to 'scripts/gcc-plugins/randomize_layout_plugin.c')
0 files changed, 0 insertions, 0 deletions