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[1/3] PM / core: Re-factor some code dealing with parents in __device_suspend()

Message ID 1510154134-1248-2-git-send-email-ulf.hansson@linaro.org (mailing list archive)
State Superseded
Delegated to: Geert Uytterhoeven
Headers show

Commit Message

Ulf Hansson Nov. 8, 2017, 3:15 p.m. UTC 
Let's make the code a bit more readable by moving some of the code, which
deals with adjustments for parent devices in __device_suspend(), into its
own function.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 drivers/base/power/main.c | 29 +++++++++++++++++------------
 1 file changed, 17 insertions(+), 12 deletions(-)

Comments

Geert Uytterhoeven Nov. 8, 2017, 3:26 p.m. UTC | #1 
On Wed, Nov 8, 2017 at 4:15 PM, Ulf Hansson <ulf.hansson@linaro.org> wrote:
> Let's make the code a bit more readable by moving some of the code, which
> deals with adjustments for parent devices in __device_suspend(), into its
> own function.
>
> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
diff mbox

Patch

diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index 6c6f1c7..8089e72 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -1422,6 +1422,22 @@  static int legacy_suspend(struct device *dev, pm_message_t state,
 	return error;
 }
 
+static void dpm_propagate_to_parent(struct device *dev)
+{
+	struct device *parent = dev->parent;
+
+	if (!parent)
+		return;
+
+	spin_lock_irq(&parent->power.lock);
+
+	parent->power.direct_complete = false;
+	if (dev->power.wakeup_path && !parent->power.ignore_children)
+		parent->power.wakeup_path = true;
+
+	spin_unlock_irq(&parent->power.lock);
+}
+
 static void dpm_clear_suppliers_direct_complete(struct device *dev)
 {
 	struct device_link *link;
@@ -1530,19 +1546,8 @@  static int __device_suspend(struct device *dev, pm_message_t state, bool async)
 
  End:
 	if (!error) {
-		struct device *parent = dev->parent;
-
 		dev->power.is_suspended = true;
-		if (parent) {
-			spin_lock_irq(&parent->power.lock);
-
-			dev->parent->power.direct_complete = false;
-			if (dev->power.wakeup_path
-			    && !dev->parent->power.ignore_children)
-				dev->parent->power.wakeup_path = true;
-
-			spin_unlock_irq(&parent->power.lock);
-		}
+		dpm_propagate_to_parent(dev);
 		dpm_clear_suppliers_direct_complete(dev);
 	}