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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>
This commit is contained in:
Kenji Kaneshige 2011-11-10 16:42:16 +09:00 committed by Jesse Barnes
parent 0027cb3e19
commit b3c0045422
1 changed files with 8 additions and 0 deletions
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8
drivers/pci/hotplug/pciehp_hpc.c
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@ -302,6 +302,14 @@ int pciehp_check_link_status(struct controller *ctrl)
return retval; 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); pcie_update_link_speed(ctrl->pcie->port->subordinate, lnk_status);
return retval; return retval;