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[S390] cio: force console function

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If something goes wrong in a suspend / resume cycle a ccw based console
if very likely in the suspended state and cannot print anything.
Introduce ccw_device_force_console to force the wake up of the console
device to be able to print the oops message. The console device drivers
should use this function only if the system paniced.

Signed-off-by: Martin Schwidefsky <[email protected]>
This commit is contained in:
Martin Schwidefsky 2009-06-16 10:30:28 +02:00
commit 6664845cef
2 changed files with 10 additions and 0 deletions
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9
drivers/s390/cio/device.c
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@ -1789,6 +1789,15 @@ ccw_device_probe_console(void)
return &console_cdev;
}
static int ccw_device_pm_restore(struct device *dev);
int ccw_device_force_console(void)
{
if (!console_cdev_in_use)
return -ENODEV;
return ccw_device_pm_restore(&console_cdev.dev);
}
EXPORT_SYMBOL_GPL(ccw_device_force_console);
const char *cio_get_console_cdev_name(struct subchannel *sch)
{