[PATCH 005 of 7] md: Lock address when changing attributes of component devices.

[NeilBrown]

Signed-off-by: Neil Brown <[EMAIL PROTECTED]>

### Diffstat output
 ./drivers/md/md.c |    8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff .prev/drivers/md/md.c ./drivers/md/md.c
--- .prev/drivers/md/md.c       2007-12-14 16:09:01.000000000 +1100
+++ ./drivers/md/md.c   2007-12-14 16:09:03.000000000 +1100
@@ -2080,12 +2080,18 @@ rdev_attr_store(struct kobject *kobj, st
 {
        struct rdev_sysfs_entry *entry = container_of(attr, struct 
rdev_sysfs_entry, attr);
        mdk_rdev_t *rdev = container_of(kobj, mdk_rdev_t, kobj);
+       int rv;
 
        if (!entry->store)
                return -EIO;
        if (!capable(CAP_SYS_ADMIN))
                return -EACCES;
-       return entry->store(rdev, page, length);
+       rv = mddev_lock(rdev->mddev);
+       if (!rv) {
+               rv = entry->store(rdev, page, length);
+               mddev_unlock(rdev->mddev);
+       }
+       return rv;
 }
 
 static void rdev_free(struct kobject *ko)
-
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