Patch "serial: 8250_omap: Fix probe and remove for PM runtime" has been added to the 4.9-stable tree

This is a note to let you know that I've just added the patch titled

serial: 8250_omap: Fix probe and remove for PM runtime

to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
serial-8250_omap-fix-probe-and-remove-for-pm-runtime.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Tony Lindgren <[email protected]>
Date: Fri, 20 Jan 2017 12:22:31 -0800
Subject: serial: 8250_omap: Fix probe and remove for PM runtime

From: Tony Lindgren <[email protected]>

commit 4e0f5cc65098ea32a1e77baae74215b9bd5276b1 upstream.

Otherwise the interconnect related code implementing PM runtime will produce these errors on a failed probe:

omap_uart 48066000.serial: omap_device: omap_device_enable() called from invalid state 1 omap_uart 48066000.serial: use pm_runtime_put_sync_suspend() in driver?

Note that we now also need to check for priv in omap8250_runtime_suspend() as it has not yet been registered if probe fails. And we need to use pm_runtime_put_sync() to properly idle the device like we already do in omap8250_remove().

---
 drivers/tty/serial/8250/8250_omap.c |    8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

@@ -1237,7 +1237,8 @@ static int omap8250_probe(struct platfor
 	pm_runtime_put_autosuspend(&pdev->dev);
 	return 0;
 err:
-	pm_runtime_put(&pdev->dev);
+	pm_runtime_dont_use_autosuspend(&pdev->dev);
+	pm_runtime_put_sync(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
 	return ret;
 }

@@ -1246,6 +1247,7 @@ static int omap8250_remove(struct platfo
 {
 	struct omap8250_priv *priv = platform_get_drvdata(pdev);
 
+	pm_runtime_dont_use_autosuspend(&pdev->dev);
 	pm_runtime_put_sync(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
 	serial8250_unregister_port(priv->line);

@@ -1345,6 +1347,10 @@ static int omap8250_runtime_suspend(stru
 	struct omap8250_priv *priv = dev_get_drvdata(dev);
 	struct uart_8250_port *up;
 
+	/* In case runtime-pm tries this before we are setup */
+	if (!priv)
+		return 0;
+
 	up = serial8250_get_port(priv->line);
 	/*
 	 * When using 'no_console_suspend', the console UART must not be

Patches currently in stable-queue which might be from [email protected] are

queue-4.9/power-supply-bq24190_charger-handle-fault-before-status-on-interrupt.patch queue-4.9/power-supply-bq24190_charger-call-power_supply_changed-for-relevant-component.patch queue-4.9/power-supply-bq24190_charger-install-irq_handler_thread-at-end-of-probe.patch queue-4.9/power-supply-bq24190_charger-call-set_mode_host-on-pm_resume.patch queue-4.9/arm-omap5-dra7-fix-hyp-mode-boot-for-thumb2-build.patch queue-4.9/serial-8250_omap-fix-probe-and-remove-for-pm-runtime.patch queue-4.9/power-supply-bq24190_charger-don-t-read-fault-register-outside-irq_handle_thread.patch queue-4.9/power-supply-bq24190_charger-fix-irq-trigger-to-irqf_trigger_falling.patch