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Date: Thu, 10 Nov 2011 16:42:16 +0900 From: Kenji Kaneshige <kaneshige.kenji@...fujitsu.com> To: Yinghai Lu <yinghai.lu@...cle.com> CC: Jesse Barnes <jbarnes@...tuousgeek.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org> Subject: [PATCH 2/2] 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. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@...fujitsu.com> --- drivers/pci/hotplug/pciehp_hpc.c | 8 ++++++++ 1 file changed, 8 insertions(+) Index: linux-3.1/drivers/pci/hotplug/pciehp_hpc.c =================================================================== --- linux-3.1.orig/drivers/pci/hotplug/pciehp_hpc.c +++ linux-3.1/drivers/pci/hotplug/pciehp_hpc.c @@ -302,6 +302,14 @@ int pciehp_check_link_status(struct cont 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; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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