The following commit has been merged in the linux branch: commit a7602f6c16b2de2962b279980693ad1b3711e84a Author: Stefan Haberland stefan.haberland@de.ibm.com Date: Wed Oct 14 12:43:46 2009 +0200
[S390] dasd: fix locking bug
Replace spin_lock with spin_lock_irqsave in dasd_eckd_restore_device.
Signed-off-by: Stefan Haberland stefan.haberland@de.ibm.com Signed-off-by: Martin Schwidefsky schwidefsky@de.ibm.com
diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c index 0be7c15..417b97c 100644 --- a/drivers/s390/block/dasd_eckd.c +++ b/drivers/s390/block/dasd_eckd.c @@ -3216,6 +3216,7 @@ int dasd_eckd_restore_device(struct dasd_device *device) struct dasd_eckd_characteristics temp_rdc_data; int is_known, rc; struct dasd_uid temp_uid; + unsigned long flags;
private = (struct dasd_eckd_private *) device->private;
@@ -3228,7 +3229,8 @@ int dasd_eckd_restore_device(struct dasd_device *device) rc = dasd_eckd_generate_uid(device, &private->uid); dasd_get_uid(device->cdev, &temp_uid); if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) - dev_err(&device->cdev->dev, "The UID of the DASD has changed\n"); + dev_err(&device->cdev->dev, "The UID of the DASD has " + "changed\n"); if (rc) goto out_err; dasd_set_uid(device->cdev, &private->uid); @@ -3256,9 +3258,9 @@ int dasd_eckd_restore_device(struct dasd_device *device) "device: %s", rc, dev_name(&device->cdev->dev)); goto out_err; } - spin_lock(get_ccwdev_lock(device->cdev)); + spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); - spin_unlock(get_ccwdev_lock(device->cdev)); + spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
/* add device to alias management */ dasd_alias_add_device(device);