Upgrade to 4.4.50-rt62

[kvmfornfv.git] / kernel / drivers / md / dm-thin-metadata.c

diff --git a/kernel/drivers/md/dm-thin-metadata.c b/kernel/drivers/md/dm-thin-metadata.c
index c219a05..911ada6 100644 (file)
--- a/kernel/drivers/md/dm-thin-metadata.c
+++ b/kernel/drivers/md/dm-thin-metadata.c
@@ -1943,5 +1943,8 @@ bool dm_pool_metadata_needs_check(struct dm_pool_metadata *pmd)
 
 void dm_pool_issue_prefetches(struct dm_pool_metadata *pmd)
 {
-       dm_tm_issue_prefetches(pmd->tm);
+       down_read(&pmd->root_lock);
+       if (!pmd->fail_io)
+               dm_tm_issue_prefetches(pmd->tm);
+       up_read(&pmd->root_lock);
 }