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path: root/drivers/md/raid10.c
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Diffstat (limited to 'drivers/md/raid10.c')
-rw-r--r--drivers/md/raid10.c15
1 files changed, 11 insertions, 4 deletions
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 5169ed2a9156..aa8ba0760cac 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -1633,6 +1633,7 @@ static void status(struct seq_file *seq, struct mddev *mddev)
static int _enough(struct r10conf *conf, int previous, int ignore)
{
int first = 0;
+ int has_enough = 0;
int disks, ncopies;
if (previous) {
disks = conf->prev.raid_disks;
@@ -1642,21 +1643,27 @@ static int _enough(struct r10conf *conf, int previous, int ignore)
ncopies = conf->geo.near_copies;
}
+ rcu_read_lock();
do {
int n = conf->copies;
int cnt = 0;
int this = first;
while (n--) {
- if (conf->mirrors[this].rdev &&
- this != ignore)
+ struct md_rdev *rdev;
+ if (this != ignore &&
+ (rdev = rcu_dereference(conf->mirrors[this].rdev)) &&
+ test_bit(In_sync, &rdev->flags))
cnt++;
this = (this+1) % disks;
}
if (cnt == 0)
- return 0;
+ goto out;
first = (first + ncopies) % disks;
} while (first != 0);
- return 1;
+ has_enough = 1;
+out:
+ rcu_read_unlock();
+ return has_enough;
}
static int enough(struct r10conf *conf, int ignore)