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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2009-06-16 10:30:28 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2009-06-16 10:31:11 +0200 |
| commit | 6664845cef13b0a224f43f6c46eddd0b3e018c04 (patch) | |
| tree | 09350ab336e1de833e100e78efa1cfbe716aa195 /drivers/s390 | |
| parent | [S390] pm: xpram driver power management callbacks (diff) | |
| download | linux-6664845cef13b0a224f43f6c46eddd0b3e018c04.tar.xz linux-6664845cef13b0a224f43f6c46eddd0b3e018c04.zip | |
[S390] cio: force console function
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 <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390')
| -rw-r--r-- | drivers/s390/cio/device.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c index 64bd79ac25a7..3c57c1a18bb8 100644 --- a/drivers/s390/cio/device.c +++ b/drivers/s390/cio/device.c @@ -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) { |