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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2009-06-16 10:30:28 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2009-06-16 10:31:11 +0200
commit6664845cef13b0a224f43f6c46eddd0b3e018c04 (patch)
tree09350ab336e1de833e100e78efa1cfbe716aa195 /drivers
parent14532095dfe9e8faf2d314d9c2170f64737c7dff (diff)
[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')
-rw-r--r--drivers/s390/cio/device.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c
index 64bd79ac25a..3c57c1a18bb 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)
{