2 files changed, 8 insertions, 0 deletions

diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index 8939e6105088..5a7eb650181e 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -102,6 +102,8 @@ static void combine_restrictions_low(struct io_restrictions *lhs,
         lhs->seg_boundary_mask =
                 min_not_zero(lhs->seg_boundary_mask, rhs->seg_boundary_mask);
 
+        lhs->bounce_pfn = min_not_zero(lhs->bounce_pfn, rhs->bounce_pfn);
+
         lhs->no_cluster |= rhs->no_cluster;
 }
 
@@ -566,6 +568,8 @@ void dm_set_device_limits(struct dm_target *ti, struct block_device *bdev)
                 min_not_zero(rs->seg_boundary_mask,
                              q->seg_boundary_mask);
 
+        rs->bounce_pfn = min_not_zero(rs->bounce_pfn, q->bounce_pfn);
+
         rs->no_cluster |= !test_bit(QUEUE_FLAG_CLUSTER, &q->queue_flags);
 }
 EXPORT_SYMBOL_GPL(dm_set_device_limits);
@@ -707,6 +711,8 @@ static void check_for_valid_limits(struct io_restrictions *rs)
                 rs->max_segment_size = MAX_SEGMENT_SIZE;
         if (!rs->seg_boundary_mask)
                 rs->seg_boundary_mask = -1;
+        if (!rs->bounce_pfn)
+                rs->bounce_pfn = -1;
 }
 
 int dm_table_add_target(struct dm_table *t, const char *type,
@@ -891,6 +897,7 @@ void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q)
         q->hardsect_size = t->limits.hardsect_size;
         q->max_segment_size = t->limits.max_segment_size;
         q->seg_boundary_mask = t->limits.seg_boundary_mask;
+        q->bounce_pfn = t->limits.bounce_pfn;
         if (t->limits.no_cluster)
                 q->queue_flags &= ~(1 << QUEUE_FLAG_CLUSTER);
         else
diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h
index 37c66d1254b5..b8b7c51389fe 100644
--- a/include/linux/device-mapper.h
+++ b/include/linux/device-mapper.h
@@ -116,6 +116,7 @@ struct io_restrictions {
         unsigned short          hardsect_size;
         unsigned int            max_segment_size;
         unsigned long           seg_boundary_mask;
+        unsigned long           bounce_pfn;
         unsigned char           no_cluster; /* inverted so that 0 is default */
 };