On Thu, Sep 6, 2012 at 7:34 AM, Prarit Bhargava <prarit@xxxxxxxxxx> wrote: > Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx> > Cc: Kenji Kaneshige <kaneshige.kenji@xxxxxxxxxxxxxx> > Cc: stable@xxxxxxxxxxxxxxx > >>diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c >>index 13b2eaf..7cee8db 100644 >>--- a/drivers/pci/hotplug/pciehp_hpc.c >>+++ b/drivers/pci/hotplug/pciehp_hpc.c >>@@ -631,6 +631,8 @@ int pciehp_power_off_slot(struct slot * slot) >> slot_cmd = POWER_OFF; >> cmd_mask = PCI_EXP_SLTCTL_PCC; >> retval = pcie_write_cmd(ctrl, slot_cmd, cmd_mask); >>+ /* need to enable link again for present bit report */ >>+ pciehp_link_enable(ctrl); > > You're not checking the return value of pciehp_link_enable(). I wonder if > enabling the link is the only way to get the present bit to report correctly... that is silicon problem. and no one noticed that before. > > Also, should the pciehp_link_enable() be called in pciehp_power_on_slot() if > we already reenable it on the power off? we call that in pciehp_power_on_slot for another case: BIOS could have link disable on pcie slot if there is no card plugged in that slot. Thanks Yinghai -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
