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| author | Khalid Aziz | 2012-04-27 21:00:33 +0200 |
|---|---|---|
| committer | Bjorn Helgaas | 2012-05-04 19:07:18 +0200 |
| commit | b566a22c23327f18ce941ffad0ca907e50a53d41 (patch) | |
| tree | ce675ff2f56a88778ea051f779868ffb9d746160 /MAINTAINERS | |
| parent | PCI: work around IvyBridge internal graphics FLR erratum (diff) | |
| download | kernel-qcow2-linux-b566a22c23327f18ce941ffad0ca907e50a53d41.tar.gz kernel-qcow2-linux-b566a22c23327f18ce941ffad0ca907e50a53d41.tar.xz kernel-qcow2-linux-b566a22c23327f18ce941ffad0ca907e50a53d41.zip | |
PCI: disable Bus Master on PCI device shutdown
Disable Bus Master bit on the device in pci_device_shutdown() to ensure PCI
devices do not continue to DMA data after shutdown. This can cause memory
corruption in case of a kexec where the current kernel shuts down and
transfers control to a new kernel while a PCI device continues to DMA to
memory that does not belong to it any more in the new kernel.
I have tested this code on two laptops, two workstations and a 16-socket
server. kexec worked correctly on all of them.
Signed-off-by: Khalid Aziz <khalid.aziz@hp.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'MAINTAINERS')
0 files changed, 0 insertions, 0 deletions