s390/cio: use device_lock during cmb activation
Hold the device_lock during [de]activation of the channel measurement
block to synchronize concurrent usage of these functions.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Reviewed-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c
index dfef5e6..20b92c7 100644
--- a/drivers/s390/cio/device.c
+++ b/drivers/s390/cio/device.c
@@ -1797,7 +1797,7 @@
cdev = to_ccwdev(dev);
if (cdev->drv && cdev->drv->shutdown)
cdev->drv->shutdown(cdev);
- disable_cmf(cdev);
+ __disable_cmf(cdev);
}
static int ccw_device_pm_prepare(struct device *dev)