diff options
| author | Arnd Bergmann <arnd@arndb.de> | 2011-10-17 11:22:50 +0000 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2011-10-17 11:22:50 +0000 |
| commit | 8eb41582d2106eccc7717047d1184481f5a1b3a6 (patch) | |
| tree | 12257bbe39b5c8ae6918198fde682ed0aacd8e00 /drivers/pci/probe.c | |
| parent | 127d4eb97b7bebc15fd692603263e75c220e24f9 (diff) | |
| parent | 1cb17e2dbd09436069733500ea48e0c9b1f0a1cc (diff) | |
Merge branch 'ep93xx/board' into next/board
Diffstat (limited to 'drivers/pci/probe.c')
| -rw-r--r-- | drivers/pci/probe.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index b1187ff31d8..6ab6bd3df4b 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -1351,7 +1351,8 @@ static int pcie_find_smpss(struct pci_dev *dev, void *data) * will occur as normal. */ if (dev->is_hotplug_bridge && (!list_is_singular(&dev->bus->devices) || - dev->bus->self->pcie_type != PCI_EXP_TYPE_ROOT_PORT)) + (dev->bus->self && + dev->bus->self->pcie_type != PCI_EXP_TYPE_ROOT_PORT))) *smpss = 0; if (*smpss > dev->pcie_mpss) @@ -1457,12 +1458,24 @@ static int pcie_bus_configure_set(struct pci_dev *dev, void *data) */ void pcie_bus_configure_settings(struct pci_bus *bus, u8 mpss) { - u8 smpss = mpss; + u8 smpss; if (!pci_is_pcie(bus->self)) return; + if (pcie_bus_config == PCIE_BUS_TUNE_OFF) + return; + + /* FIXME - Peer to peer DMA is possible, though the endpoint would need + * to be aware to the MPS of the destination. To work around this, + * simply force the MPS of the entire system to the smallest possible. + */ + if (pcie_bus_config == PCIE_BUS_PEER2PEER) + smpss = 0; + if (pcie_bus_config == PCIE_BUS_SAFE) { + smpss = mpss; + pcie_find_smpss(bus->self, &smpss); pci_walk_bus(bus, pcie_find_smpss, &smpss); } |