4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Tony Lindgren <tony@xxxxxxxxxxx>
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().
Fixes: 61929cf0169d ("tty: serial: Add 8250-core based omap driver")
Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/tty/serial/8250/8250_omap.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
--- a/drivers/tty/serial/8250/8250_omap.c
+++ b/drivers/tty/serial/8250/8250_omap.c
@@ -1235,7 +1235,8 @@ 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;
}
@@ -1244,6 +1245,7 @@ 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);
@@ -1343,6 +1345,10 @@ 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