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-rw-r--r--drivers/md/dm.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index b98cd9d84435..2caf5b374649 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -206,6 +206,9 @@ struct mapped_device {
/* zero-length flush that will be cloned and submitted to targets */
struct bio flush_bio;
+ /* the number of internal suspends */
+ unsigned internal_suspend_count;
+
struct dm_stats stats;
};
@@ -2928,7 +2931,7 @@ static void __dm_internal_suspend(struct mapped_device *md, unsigned suspend_fla
{
struct dm_table *map = NULL;
- if (dm_suspended_internally_md(md))
+ if (md->internal_suspend_count++)
return; /* nested internal suspend */
if (dm_suspended_md(md)) {
@@ -2953,7 +2956,9 @@ static void __dm_internal_suspend(struct mapped_device *md, unsigned suspend_fla
static void __dm_internal_resume(struct mapped_device *md)
{
- if (!dm_suspended_internally_md(md))
+ BUG_ON(!md->internal_suspend_count);
+
+ if (--md->internal_suspend_count)
return; /* resume from nested internal suspend */
if (dm_suspended_md(md))

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