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authorStefan Haberland <stefan.haberland@de.ibm.com>2009-10-14 12:43:46 +0200
committerMartin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com>2009-10-14 12:43:52 +0200
commita7602f6c16b2de2962b279980693ad1b3711e84a (patch)
treea58ecfd6bf49a2b64445ccda1f727f77bbdaa62d
parent03cadd36d51c737d7ad6aa21e2524296be6fe57f (diff)
downloadop-kernel-dev-a7602f6c16b2de2962b279980693ad1b3711e84a.zip
op-kernel-dev-a7602f6c16b2de2962b279980693ad1b3711e84a.tar.gz
[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>
-rw-r--r--drivers/s390/block/dasd_eckd.c8
1 files changed, 5 insertions, 3 deletions
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);
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