MD isn't ready for multipage bvecs, so mark it as
NO_MP.
Signed-off-by: Ming Lei <tom.leiming@xxxxxxxxx>
---
drivers/md/md.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/drivers/md/md.c b/drivers/md/md.c
index eac84d8ff724..f8d98098dff8 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -5128,6 +5128,16 @@ static void md_safemode_timeout(unsigned long data)
static int start_dirty_degraded;
+/*
+ * MD isn't ready for multipage bvecs yet, and set the flag
+ * so that MD still can see singlepage bvecs bio
+ */
+static inline void md_set_no_mp(struct mddev *mddev)
+{
+ if (mddev->queue)
+ set_bit(QUEUE_FLAG_NO_MP, &mddev->queue->queue_flags);
+}
+
int md_run(struct mddev *mddev)
{
int err;
@@ -5353,6 +5363,8 @@ int md_run(struct mddev *mddev)
if (mddev->flags & MD_UPDATE_SB_FLAGS)
md_update_sb(mddev, 0);
+ md_set_no_mp(mddev);
+
md_new_event(mddev);
sysfs_notify_dirent_safe(mddev->sysfs_state);
sysfs_notify_dirent_safe(mddev->sysfs_action);
--
2.7.4
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