diff options
| author | Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> | 2011-11-10 16:42:16 +0900 |
|---|---|---|
| committer | Jesse Barnes <jbarnes@virtuousgeek.org> | 2011-11-11 09:31:43 -0800 |
| commit | b3c004542229099e18198061c737e13eafc8d4d6 (patch) | |
| tree | a9c753784797cb2252e5386cc128aeff3ab23ceb /drivers/pci/hotplug/pciehp_hpc.c | |
| parent | 0027cb3e1947d0f453fece40ed16764fb362bac6 (diff) | |
| download | lwn-b3c004542229099e18198061c737e13eafc8d4d6.tar.gz lwn-b3c004542229099e18198061c737e13eafc8d4d6.zip | |
PCI: pciehp: wait 100 ms after Link Training check
If the port supports Link speeds greater than 5.0 GT/s, we must wait
for 100 ms after Link training completes before sending configuration
request.
Acked-by: Yinghai Lu <yinghai@kernel.org>
Tested-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'drivers/pci/hotplug/pciehp_hpc.c')
| -rw-r--r-- | drivers/pci/hotplug/pciehp_hpc.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c index 81a177a5f032..7b1414810ae3 100644 --- a/drivers/pci/hotplug/pciehp_hpc.c +++ b/drivers/pci/hotplug/pciehp_hpc.c @@ -302,6 +302,14 @@ int pciehp_check_link_status(struct controller *ctrl) return retval; } + /* + * If the port supports Link speeds greater than 5.0 GT/s, we + * must wait for 100 ms after Link training completes before + * sending configuration request. + */ + if (ctrl->pcie->port->subordinate->max_bus_speed > PCIE_SPEED_5_0GT) + msleep(100); + pcie_update_link_speed(ctrl->pcie->port->subordinate, lnk_status); return retval; |