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From: "Rafael J. Wysocki" <rjw@rjwysocki.net>
To: Bjorn Helgaas <helgaas@kernel.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
	Linux PCI <linux-pci@vger.kernel.org>,
	Linux PM <linux-pm@vger.kernel.org>,
	Mika Westerberg <mika.westerberg@linux.intel.com>,
	Christoph Hellwig <hch@infradead.org>
Subject: [PATCH update 5/5] PCI: PM: Fold __pci_complete_power_transition() into its caller
Date: Tue, 05 Nov 2019 17:32:08 +0100	[thread overview]
Message-ID: <15576968.k611qn3UU0@kreacher> (raw)
In-Reply-To: <2771503.n70vfTtcVb@kreacher>

From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Because pci_set_power_state() has become the only caller of
__pci_complete_power_transition(), there is no need for the latter to
be a separate function any more, so fold it into the former, drop a
redundant check and reduce the number of lines of code somewhat.

Code rearrangement, no intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---

Changes from the original:
 - Avoid using the extra local var in pci_set_power_state() (Christoph).

---
 drivers/pci/pci.c |   30 +++++++-----------------------
 1 file changed, 7 insertions(+), 23 deletions(-)

Index: linux-pm/drivers/pci/pci.c
===================================================================
--- linux-pm.orig/drivers/pci/pci.c
+++ linux-pm/drivers/pci/pci.c
@@ -1056,26 +1056,6 @@ void pci_bus_set_current_state(struct pc
 }
 
 /**
- * __pci_complete_power_transition - Complete power transition of a PCI device
- * @dev: PCI device to handle.
- * @state: State to put the device into.
- *
- * This function should not be called directly by device drivers.
- */
-static int __pci_complete_power_transition(struct pci_dev *dev, pci_power_t state)
-{
-	int ret;
-
-	if (state <= PCI_D0)
-		return -EINVAL;
-	ret = pci_platform_power_transition(dev, state);
-	/* Power off the bridge may power off the whole hierarchy */
-	if (!ret && state == PCI_D3cold)
-		pci_bus_set_current_state(dev->subordinate, PCI_D3cold);
-	return ret;
-}
-
-/**
  * pci_set_power_state - Set the power state of a PCI device
  * @dev: PCI device to handle.
  * @state: PCI power state (D0, D1, D2, D3hot) to put the device into.
@@ -1132,10 +1112,14 @@ int pci_set_power_state(struct pci_dev *
 	error = pci_raw_set_power_state(dev, state > PCI_D3hot ?
 					PCI_D3hot : state);
 
-	if (!__pci_complete_power_transition(dev, state))
-		error = 0;
+	if (pci_platform_power_transition(dev, state))
+		return error;
+
+	/* Powering off a bridge may power off the whole hierarchy */
+	if (state == PCI_D3cold)
+		pci_bus_set_current_state(dev->subordinate, PCI_D3cold);
 
-	return error;
+	return 0;
 }
 EXPORT_SYMBOL(pci_set_power_state);
 




  parent reply	other threads:[~2019-11-05 16:32 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-05 10:11 [PATCH 0/5] PCI: PM: Cleanups related to power state changes Rafael J. Wysocki
2019-11-05 10:13 ` [PATCH 1/5] PCI: PM: Move power state update away from pci_power_up() Rafael J. Wysocki
2019-11-05 10:27 ` [PATCH 2/5] PCI: PM: Use pci_power_up() in pci_set_power_state() Rafael J. Wysocki
2019-11-05 10:29 ` [PATCH 3/5] PCI: PM: Fold __pci_start_power_transition() into its caller Rafael J. Wysocki
2019-11-05 10:30 ` [PATCH 4/5] PCI: PM: Avoid exporting __pci_complete_power_transition() Rafael J. Wysocki
2019-11-05 10:32 ` [PATCH 5/5] PCI: PM: Fold __pci_complete_power_transition() into its caller Rafael J. Wysocki
2019-11-05 16:09   ` Christoph Hellwig
2019-11-05 16:15     ` Rafael J. Wysocki
2019-11-05 11:28 ` [PATCH 0/5] PCI: PM: Cleanups related to power state changes Rafael J. Wysocki
2019-11-05 22:35   ` Bjorn Helgaas
2019-11-05 22:48     ` Rafael J. Wysocki
2019-11-05 13:02 ` Mika Westerberg
2019-11-05 16:32 ` Rafael J. Wysocki [this message]
2019-11-06 19:02 ` Bjorn Helgaas
2019-11-07 13:33   ` Rafael J. Wysocki
2019-11-08 11:49   ` Rafael J. Wysocki
2019-11-08 20:13     ` Bjorn Helgaas

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