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Revert "serial: 8250_omap: Set the console genpd always on if no console suspend"

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This reverts commit 68e6939ea9.

Kevin reported that this causes a crash during suspend on platforms that
dont use PM domains.

Link: https://lore.kernel.org/r/7ha5hgpchq.fsf@baylibre.com
Cc: Thomas Richard <thomas.richard@bootlin.com>
Fixes: 68e6939ea9 ("serial: 8250_omap: Set the console genpd always on if no console suspend")
Cc: stable <stable@kernel.org>
Reported-by: Kevin Hilman <khilman@kernel.org>
Signed-off-by: Griffin Kroah-Hartman <griffin@kroah.com>
Link: https://lore.kernel.org/r/20240814111747.82371-1-griffin@kroah.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Griffin Kroah-Hartman 2024-08-14 13:17:47 +02:00 committed by Greg Kroah-Hartman
parent c9f6613b16
commit 0863bffda1
1 changed files with 5 additions and 28 deletions
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33
drivers/tty/serial/8250/8250_omap.c
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@ -27,7 +27,6 @@
#include <linux/pm_wakeirq.h>
#include <linux/dma-mapping.h>
#include <linux/sys_soc.h>
#include <linux/pm_domain.h>
#include "8250.h"
@ -119,12 +118,6 @@
#define UART_OMAP_TO_L 0x26
#define UART_OMAP_TO_H 0x27
/*
* Copy of the genpd flags for the console.
* Only used if console suspend is disabled
*/
static unsigned int genpd_flags_console;
struct omap8250_priv {
void __iomem *membase;
int line;
@ -1655,7 +1648,6 @@ static int omap8250_suspend(struct device *dev)
{
struct omap8250_priv *priv = dev_get_drvdata(dev);
struct uart_8250_port *up = serial8250_get_port(priv->line);
struct generic_pm_domain *genpd = pd_to_genpd(dev->pm_domain);
int err = 0;
serial8250_suspend_port(priv->line);
@ -1666,19 +1658,8 @@ static int omap8250_suspend(struct device *dev)
if (!device_may_wakeup(dev))
priv->wer = 0;
serial_out(up, UART_OMAP_WER, priv->wer);
if (uart_console(&up->port)) {
if (console_suspend_enabled)
err = pm_runtime_force_suspend(dev);
else {
/*
* The pd shall not be powered-off (no console suspend).
* Make copy of genpd flags before to set it always on.
* The original value is restored during the resume.
*/
genpd_flags_console = genpd->flags;
genpd->flags |= GENPD_FLAG_ALWAYS_ON;
}
}
if (uart_console(&up->port) && console_suspend_enabled)
err = pm_runtime_force_suspend(dev);
flush_work(&priv->qos_work);
return err;
@ -1688,16 +1669,12 @@ static int omap8250_resume(struct device *dev)
{
struct omap8250_priv *priv = dev_get_drvdata(dev);
struct uart_8250_port *up = serial8250_get_port(priv->line);
struct generic_pm_domain *genpd = pd_to_genpd(dev->pm_domain);
int err;
if (uart_console(&up->port) && console_suspend_enabled) {
if (console_suspend_enabled) {
err = pm_runtime_force_resume(dev);
if (err)
return err;
} else
genpd->flags = genpd_flags_console;
err = pm_runtime_force_resume(dev);
if (err)
return err;
}
serial8250_resume_port(priv->line);