diff options
| -rw-r--r-- | drivers/pci/hotplug/pciehp_ctrl.c | 27 | ||||
| -rw-r--r-- | drivers/pci/hotplug/pciehp_hpc.c | 26 |
2 files changed, 17 insertions, 36 deletions
diff --git a/drivers/pci/hotplug/pciehp_ctrl.c b/drivers/pci/hotplug/pciehp_ctrl.c index 15ce2a3cc0f..d6ac1b261dd 100644 --- a/drivers/pci/hotplug/pciehp_ctrl.c +++ b/drivers/pci/hotplug/pciehp_ctrl.c @@ -142,23 +142,9 @@ u8 pciehp_handle_power_fault(struct slot *p_slot) /* power fault */ ctrl_dbg(ctrl, "Power fault interrupt received\n"); - - if (!pciehp_query_power_fault(p_slot)) { - /* - * power fault Cleared - */ - ctrl_info(ctrl, "Power fault cleared on Slot(%s)\n", - slot_name(p_slot)); - event_type = INT_POWER_FAULT_CLEAR; - } else { - /* - * power fault - */ - ctrl_info(ctrl, "Power fault on Slot(%s)\n", slot_name(p_slot)); - event_type = INT_POWER_FAULT; - ctrl_info(ctrl, "Power fault bit %x set\n", 0); - } - + ctrl_err(ctrl, "Power fault on slot %s\n", slot_name(p_slot)); + event_type = INT_POWER_FAULT; + ctrl_info(ctrl, "Power fault bit %x set\n", 0); queue_interrupt_event(p_slot, event_type); return 1; @@ -224,13 +210,12 @@ static int board_added(struct slot *p_slot) retval = pciehp_check_link_status(ctrl); if (retval) { ctrl_err(ctrl, "Failed to check link status\n"); - set_slot_off(ctrl, p_slot); - return retval; + goto err_exit; } /* Check for a power fault */ - if (pciehp_query_power_fault(p_slot)) { - ctrl_dbg(ctrl, "Power fault detected\n"); + if (ctrl->power_fault_detected || pciehp_query_power_fault(p_slot)) { + ctrl_err(ctrl, "Power fault on slot %s\n", slot_name(p_slot)); retval = -EIO; goto err_exit; } diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c index 90dac515b60..10040d58c8e 100644 --- a/drivers/pci/hotplug/pciehp_hpc.c +++ b/drivers/pci/hotplug/pciehp_hpc.c @@ -511,15 +511,10 @@ int pciehp_power_on_slot(struct slot * slot) return retval; } } + ctrl->power_fault_detected = 0; slot_cmd = POWER_ON; cmd_mask = PCI_EXP_SLTCTL_PCC; - if (!pciehp_poll_mode) { - /* Enable power fault detection turned off at power off time */ - slot_cmd |= PCI_EXP_SLTCTL_PFDE; - cmd_mask |= PCI_EXP_SLTCTL_PFDE; - } - retval = pcie_write_cmd(ctrl, slot_cmd, cmd_mask); if (retval) { ctrl_err(ctrl, "Write %x command failed!\n", slot_cmd); @@ -528,7 +523,6 @@ int pciehp_power_on_slot(struct slot * slot) ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__, pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, slot_cmd); - ctrl->power_fault_detected = 0; return retval; } @@ -541,12 +535,6 @@ int pciehp_power_off_slot(struct slot * slot) slot_cmd = POWER_OFF; cmd_mask = PCI_EXP_SLTCTL_PCC; - if (!pciehp_poll_mode) { - /* Disable power fault detection */ - slot_cmd &= ~PCI_EXP_SLTCTL_PFDE; - cmd_mask |= PCI_EXP_SLTCTL_PFDE; - } - retval = pcie_write_cmd(ctrl, slot_cmd, cmd_mask); if (retval) { ctrl_err(ctrl, "Write command failed!\n"); @@ -790,11 +778,19 @@ int pcie_enable_notification(struct controller *ctrl) { u16 cmd, mask; + /* + * TBD: Power fault detected software notification support. + * + * Power fault detected software notification is not enabled + * now, because it caused power fault detected interrupt storm + * on some machines. On those machines, power fault detected + * bit in the slot status register was set again immediately + * when it is cleared in the interrupt service routine, and + * next power fault detected interrupt was notified again. + */ cmd = PCI_EXP_SLTCTL_PDCE; if (ATTN_BUTTN(ctrl)) cmd |= PCI_EXP_SLTCTL_ABPE; - if (POWER_CTRL(ctrl)) - cmd |= PCI_EXP_SLTCTL_PFDE; if (MRL_SENS(ctrl)) cmd |= PCI_EXP_SLTCTL_MRLSCE; if (!pciehp_poll_mode) |