/*
* Berlin2 BG2Q clock tree IDs
*/
#define CLKID_SYS 0
#define CLKID_DRMFIGO 1
#define CLKID_CFG 2
#define CLKID_GFX2D 3
#define CLKID_ZSP 4
#define CLKID_PERIF 5
#define CLKID_PCUBE 6
#define CLKID_VSCOPE 7
#define CLKID_NFC_ECC 8
#define CLKID_VPP 9
#define CLKID_APP 10
#define CLKID_SDIO0XIN 11
#define CLKID_SDIO1XIN 12
#define CLKID_GFX2DAXI 13
#define CLKID_GETH0 14
#define CLKID_SATA 15
#define CLKID_AHBAPB 16
#define CLKID_USB0 17
#define CLKID_USB1 18
#define CLKID_USB2 19
#define CLKID_USB3 20
#define CLKID_PBRIDGE 21
#define CLKID_SDIO 22
#define CLKID_NFC 23
#define CLKID_SMEMC 24
#define CLKID_PCIE 25
#define CLKID_TWD 26
#define CLKID_CPU 27
/>
| index : net-next.git | |
| net-next plumbings | Tobias Klauser |
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+