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authorTobias Klauser <tklauser@distanz.ch>2020-02-01 15:12:25 +0100
committerTobias Klauser <tklauser@distanz.ch>2020-02-01 15:12:41 +0100
commit61f7607328f30718daf27c8d1da2101c7ec30f9e (patch)
tree9e10eb2e77a951c1a20aed84a57098b241c66f99 /SubmittingPatches
parent17ea1053cc71feca63004318aeb7deaa0a99b5c4 (diff)
AUTHORS: update
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Diffstat (limited to 'SubmittingPatches')
0 files changed, 0 insertions, 0 deletions
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2025-02-23 19:42:05 +0000
x/net-next.git/diff/tools/testing/selftests/powerpc/math/vsx_asm.S?id=030305d69fc6963c16003f50d7e8d74b02d0a143&id2=4d191b1b63c209e37bf27938ef365244d3c41084'>diff)
PCI/ASPM: Handle PCI-to-PCIe bridges as roots of PCIe hierarchies
In a struct pcie_link_state, link->root points to the pcie_link_state of the root of the PCIe hierarchy. For the topmost link, this points to itself (link->root = link). For others, we copy the pointer from the parent (link->root = link->parent->root). Previously we recognized that Root Ports originated PCIe hierarchies, but we treated PCI/PCI-X to PCIe Bridges as being in the middle of the hierarchy, and when we tried to copy the pointer from link->parent->root, there was no parent, and we dereferenced a NULL pointer: BUG: unable to handle kernel NULL pointer dereference at 0000000000000090 IP: [<ffffffff9e424350>] pcie_aspm_init_link_state+0x170/0x820 Recognize that PCI/PCI-X to PCIe Bridges originate PCIe hierarchies just like Root Ports do, so link->root for these devices should also point to itself. Fixes: 51ebfc92b72b ("PCI: Enumerate switches below PCI-to-PCIe bridges") Link: https://bugzilla.kernel.org/show_bug.cgi?id=193411 Link: https://bugzilla.opensuse.org/show_bug.cgi?id=1022181 Tested-by: lists@ssl-mail.com Tested-by: Jayachandran C. <jnair@caviumnetworks.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> CC: stable@vger.kernel.org # v4.2+
Diffstat (limited to 'tools/testing/selftests/powerpc/math/vsx_asm.S')