From 6407e5ecdc66cd9da760e751a7c092c87a683861 Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Date: Wed, 29 Sep 2021 20:11:18 +0200
Subject: [PATCH] PCI: PM: Make pci_choose_state() call pci_target_state()
Git-commit: 6407e5ecdc66cd9da760e751a7c092c87a683861
References: jsc#SLE-19359
Patch-mainline: v5.16-rc1
The pci_choose_state() and pci_target_state() implementations are
somewhat divergent without a good reason, because they are used
for similar purposes.
Change the pci_choose_state() implementation to use pci_target_state()
internally except for transitions to the working state of the system
in which case it is expected to return D0.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Ferry Toth <fntoth@gmail.com>
Signed-off-by: Oliver Neukum <oneukum@suse.com>
---
drivers/pci/pci-acpi.c | 3 ---
drivers/pci/pci.c | 54 +++++++++++++-----------------------------
2 files changed, 16 insertions(+), 41 deletions(-)
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c
index 9663b13944ad..889dc8c0d409 100644
--- a/drivers/pci/pci-acpi.c
+++ b/drivers/pci/pci-acpi.c
@@ -910,9 +910,6 @@ pci_power_t acpi_pci_choose_state(struct pci_dev *pdev)
{
int acpi_state, d_max;
- if (acpi_pci_disabled)
- return PCI_POWER_ERROR;
-
if (pdev->no_d3cold)
d_max = ACPI_STATE_D3_HOT;
else
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 121d9deea58a..ae8fb60843dd 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -1394,44 +1394,6 @@ int pci_set_power_state(struct pci_dev *dev, pci_power_t state)
}
EXPORT_SYMBOL(pci_set_power_state);
-/**
- * pci_choose_state - Choose the power state of a PCI device
- * @dev: PCI device to be suspended
- * @state: target sleep state for the whole system. This is the value
- * that is passed to suspend() function.
- *
- * Returns PCI power state suitable for given device and given system
- * message.
- */
-pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state)
-{
- pci_power_t ret;
-
- if (!dev->pm_cap)
- return PCI_D0;
-
- ret = platform_pci_choose_state(dev);
- if (ret != PCI_POWER_ERROR)
- return ret;
-
- switch (state.event) {
- case PM_EVENT_ON:
- return PCI_D0;
- case PM_EVENT_FREEZE:
- case PM_EVENT_PRETHAW:
- /* REVISIT both freeze and pre-thaw "should" use D0 */
- case PM_EVENT_SUSPEND:
- case PM_EVENT_HIBERNATE:
- return PCI_D3hot;
- default:
- pci_info(dev, "unrecognized suspend event %d\n",
- state.event);
- BUG();
- }
- return PCI_D0;
-}
-EXPORT_SYMBOL(pci_choose_state);
-
#define PCI_EXP_SAVE_REGS 7
static struct pci_cap_saved_state *_pci_find_saved_cap(struct pci_dev *pci_dev,
@@ -2843,6 +2805,22 @@ void pci_dev_complete_resume(struct pci_dev *pci_dev)
spin_unlock_irq(&dev->power.lock);
}
+/**
+ * pci_choose_state - Choose the power state of a PCI device.
+ * @dev: Target PCI device.
+ * @state: Target state for the whole system.
+ *
+ * Returns PCI power state suitable for @dev and @state.
+ */
+pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state)
+{
+ if (state.event == PM_EVENT_ON)
+ return PCI_D0;
+
+ return pci_target_state(dev, false);
+}
+EXPORT_SYMBOL(pci_choose_state);
+
void pci_config_pm_runtime_get(struct pci_dev *pdev)
{
struct device *dev = &pdev->dev;
--
2.26.2