diff options
| author |   Gavin Shan <gwshan@linux.vnet.ibm.com> | 2017-01-11 11:50:08 +1100 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2017-02-15 20:02:43 +1100 |
| commit | 454593e54cac126a0f49d4b65f90a5e518c51404 (patch) | |
| tree | fad75e4dfb75619ec384dafc0968919e830c266b /arch/powerpc | |
| parent | drivers/pci/hotplug: Fix initial state for empty slot (diff) | |
| download | linux-dev-454593e54cac126a0f49d4b65f90a5e518c51404.tar.xz linux-dev-454593e54cac126a0f49d4b65f90a5e518c51404.zip | |
drivers/pci/hotplug: Mask PDC interrupt if required
We're supporting surprise hotplug on PCI slots behind root port
or PCIe switch downstream ports, which don't claim the capability
in hardware register (offset: PCIe cap + PCI_EXP_SLTCAP). PEX8718
is one of the examples. For those PCI slots, the PDC (Presence
Detection Change) event isn't reliable and the underly (skiboot)
firmware has best judgement.
This masks the PDC event when skiboot requests by "ibm,slot-broken-pdc"
property in PCI slot's device-tree node.
Reported-by: Hank Chang <hankmax0000@gmail.com>
Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Tested-by: Willie Liauw <williel@supermicro.com.tw>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/include/asm/pnv-pci.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/pnv-pci.h b/arch/powerpc/include/asm/pnv-pci.h index 696438f09aea..de9681034353 100644 --- a/arch/powerpc/include/asm/pnv-pci.h +++ b/arch/powerpc/include/asm/pnv-pci.h @@ -57,6 +57,8 @@ struct pnv_php_slot { uint64_t id; char *name; int slot_no; + unsigned int flags; +#define PNV_PHP_FLAG_BROKEN_PDC 0x1 struct kref kref; #define PNV_PHP_STATE_INITIALIZED 0 #define PNV_PHP_STATE_REGISTERED 1 |