Upgrade to 4.4.50-rt62

[kvmfornfv.git] / kernel / drivers / md / md.c

diff --git a/kernel/drivers/md/md.c b/kernel/drivers/md/md.c
index b1e1f6b..eff554a 100644 (file)
--- a/kernel/drivers/md/md.c
+++ b/kernel/drivers/md/md.c
@@ -293,6 +293,8 @@ static blk_qc_t md_make_request(struct request_queue *q, struct bio *bio)
         * go away inside make_request
         */
        sectors = bio_sectors(bio);
+       /* bio could be mergeable after passing to underlayer */
+       bio->bi_rw &= ~REQ_NOMERGE;
        mddev->pers->make_request(mddev, bio);
 
        cpu = part_stat_lock();
@@ -6769,7 +6771,7 @@ static int md_ioctl(struct block_device *bdev, fmode_t mode,
                /* need to ensure recovery thread has run */
                wait_event_interruptible_timeout(mddev->sb_wait,
                                                 !test_bit(MD_RECOVERY_NEEDED,
-                                                          &mddev->flags),
+                                                          &mddev->recovery),
                                                 msecs_to_jiffies(5000));
        if (cmd == STOP_ARRAY || cmd == STOP_ARRAY_RO) {
                /* Need to flush page cache, and ensure no-one else opens
@@ -7570,16 +7572,12 @@ EXPORT_SYMBOL(unregister_md_cluster_operations);
 
 int md_setup_cluster(struct mddev *mddev, int nodes)
 {
-       int err;
-
-       err = request_module("md-cluster");
-       if (err) {
-               pr_err("md-cluster module not found.\n");
-               return -ENOENT;
-       }
-
+       if (!md_cluster_ops)
+               request_module("md-cluster");
        spin_lock(&pers_lock);
+       /* ensure module won't be unloaded */
        if (!md_cluster_ops || !try_module_get(md_cluster_mod)) {
+               pr_err("can't find md-cluster module or get it's reference.\n");
                spin_unlock(&pers_lock);
                return -ENOENT;
        }