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Merge branch 'pci/hotplug'

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- Simplify Attention Button logging (Bjorn Helgaas)

- Cancel bringup sequence if card is not present, to keep from blinking
  Power Indicator indefinitely (Rongguang Wei)

- Reassign bridge resources if necessary for ACPI hotplug (Igor Mammedov)

* pci/hotplug:
  PCI: acpiphp: Reassign resources on bridge if necessary
  PCI: pciehp: Cancel bringup sequence if card is not present
  PCI: pciehp: Simplify Attention Button logging
This commit is contained in:
Bjorn Helgaas 2023-06-26 12:59:56 -05:00
commit db5ccb2eda
3 changed files with 17 additions and 14 deletions
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5
drivers/pci/hotplug/acpiphp_glue.c
View File

@ -498,7 +498,6 @@ static void enable_slot(struct acpiphp_slot *slot, bool bridge)
acpiphp_native_scan_bridge(dev);
}
} else {
LIST_HEAD(add_list);
int max, pass;
acpiphp_rescan_slot(slot);
@ -512,12 +511,10 @@ static void enable_slot(struct acpiphp_slot *slot, bool bridge)
if (pass && dev->subordinate) {
check_hotplug_bridge(slot, dev);
pcibios_resource_survey_bus(dev->subordinate);
__pci_bus_size_bridges(dev->subordinate,
&add_list);
}
}
}
__pci_bus_assign_resources(bus, &add_list, NULL);
pci_assign_unassigned_bridge_resources(bus->self);
}
acpiphp_sanitize_bus(bus);

21
drivers/pci/hotplug/pciehp_ctrl.c
View File

@ -166,11 +166,11 @@ void pciehp_handle_button_press(struct controller *ctrl)
case ON_STATE:
if (ctrl->state == ON_STATE) {
ctrl->state = BLINKINGOFF_STATE;
ctrl_info(ctrl, "Slot(%s): Powering off due to button press\n",
ctrl_info(ctrl, "Slot(%s): Button press: will power off in 5 sec\n",
slot_name(ctrl));
} else {
ctrl->state = BLINKINGON_STATE;
ctrl_info(ctrl, "Slot(%s) Powering on due to button press\n",
ctrl_info(ctrl, "Slot(%s): Button press: will power on in 5 sec\n",
slot_name(ctrl));
}
/* blink power indicator and turn off attention */
@ -185,22 +185,23 @@ void pciehp_handle_button_press(struct controller *ctrl)
* press the attention again before the 5 sec. limit
* expires to cancel hot-add or hot-remove
*/
ctrl_info(ctrl, "Slot(%s): Button cancel\n", slot_name(ctrl));
cancel_delayed_work(&ctrl->button_work);
if (ctrl->state == BLINKINGOFF_STATE) {
ctrl->state = ON_STATE;
pciehp_set_indicators(ctrl, PCI_EXP_SLTCTL_PWR_IND_ON,
PCI_EXP_SLTCTL_ATTN_IND_OFF);
ctrl_info(ctrl, "Slot(%s): Button press: canceling request to power off\n",
slot_name(ctrl));
} else {
ctrl->state = OFF_STATE;
pciehp_set_indicators(ctrl, PCI_EXP_SLTCTL_PWR_IND_OFF,
PCI_EXP_SLTCTL_ATTN_IND_OFF);
ctrl_info(ctrl, "Slot(%s): Button press: canceling request to power on\n",
slot_name(ctrl));
}
ctrl_info(ctrl, "Slot(%s): Action canceled due to button press\n",
slot_name(ctrl));
break;
default:
ctrl_err(ctrl, "Slot(%s): Ignoring invalid state %#x\n",
ctrl_err(ctrl, "Slot(%s): Button press: ignoring invalid state %#x\n",
slot_name(ctrl), ctrl->state);
break;
}
@ -256,6 +257,14 @@ void pciehp_handle_presence_or_link_change(struct controller *ctrl, u32 events)
present = pciehp_card_present(ctrl);
link_active = pciehp_check_link_active(ctrl);
if (present <= 0 && link_active <= 0) {
if (ctrl->state == BLINKINGON_STATE) {
ctrl->state = OFF_STATE;
cancel_delayed_work(&ctrl->button_work);
pciehp_set_indicators(ctrl, PCI_EXP_SLTCTL_PWR_IND_OFF,
INDICATOR_NOOP);
ctrl_info(ctrl, "Slot(%s): Card not present\n",
slot_name(ctrl));
}
mutex_unlock(&ctrl->state_lock);
return;
}

5
drivers/pci/hotplug/pciehp_hpc.c
View File

@ -722,11 +722,8 @@ static irqreturn_t pciehp_ist(int irq, void *dev_id)
}
/* Check Attention Button Pressed */
if (events & PCI_EXP_SLTSTA_ABP) {
ctrl_info(ctrl, "Slot(%s): Attention button pressed\n",
slot_name(ctrl));
if (events & PCI_EXP_SLTSTA_ABP)
pciehp_handle_button_press(ctrl);
}
/* Check Power Fault Detected */
if (events & PCI_EXP_SLTSTA_PFD) {