diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index cf09adfbaf11..e1320eea46e9 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -3953,6 +3953,80 @@ void ext4_exit_mballoc(void)
 	ext4_groupinfo_destroy_slabs();
 }
 
+static int
+ext4_mb_mark_context(struct super_block *sb, bool state, ext4_group_t group,
+		     ext4_grpblk_t blkoff, ext4_grpblk_t len)
+{
+	struct ext4_sb_info *sbi = EXT4_SB(sb);
+	struct buffer_head *bitmap_bh = NULL;
+	struct ext4_group_desc *gdp;
+	struct buffer_head *gdp_bh;
+	int err;
+	unsigned int i, already, changed;
+
+	bitmap_bh = ext4_read_block_bitmap(sb, group);
+	if (IS_ERR(bitmap_bh))
+		return PTR_ERR(bitmap_bh);
+
+	err = -EIO;
+	gdp = ext4_get_group_desc(sb, group, &gdp_bh);
+	if (!gdp)
+		goto out_err;
+
+	ext4_lock_group(sb, group);
+	if (ext4_has_group_desc_csum(sb) &&
+	    (gdp->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT))) {
+		gdp->bg_flags &= cpu_to_le16(~EXT4_BG_BLOCK_UNINIT);
+		ext4_free_group_clusters_set(sb, gdp,
+			ext4_free_clusters_after_init(sb, group, gdp));
+	}
+
+	already = 0;
+	for (i = 0; i < len; i++)
+		if (mb_test_bit(blkoff + i, bitmap_bh->b_data) ==
+				state)
+			already++;
+	changed = len - already;
+
+	if (state) {
+		mb_set_bits(bitmap_bh->b_data, blkoff, len);
+		ext4_free_group_clusters_set(sb, gdp,
+			ext4_free_group_clusters(sb, gdp) - changed);
+	} else {
+		mb_clear_bits(bitmap_bh->b_data, blkoff, len);
+		ext4_free_group_clusters_set(sb, gdp,
+			ext4_free_group_clusters(sb, gdp) + changed);
+	}
+
+	ext4_block_bitmap_csum_set(sb, gdp, bitmap_bh);
+	ext4_group_desc_csum_set(sb, group, gdp);
+	ext4_unlock_group(sb, group);
+
+	if (sbi->s_log_groups_per_flex) {
+		ext4_group_t flex_group = ext4_flex_group(sbi, group);
+		struct flex_groups *fg = sbi_array_rcu_deref(sbi,
+					   s_flex_groups, flex_group);
+
+		if (state)
+			atomic64_sub(changed, &fg->free_clusters);
+		else
+			atomic64_add(changed, &fg->free_clusters);
+	}
+
+	err = ext4_handle_dirty_metadata(NULL, NULL, bitmap_bh);
+	if (err)
+		goto out_err;
+	err = ext4_handle_dirty_metadata(NULL, NULL, gdp_bh);
+	if (err)
+		goto out_err;
+
+	sync_dirty_buffer(bitmap_bh);
+	sync_dirty_buffer(gdp_bh);
+
+out_err:
+	brelse(bitmap_bh);
+	return err;
+}
 
 /*
  * Check quota and mark chosen space (ac->ac_b_ex) non-free in bitmaps
@@ -4079,15 +4153,11 @@ ext4_mb_mark_diskspace_used(struct ext4_allocation_context *ac,
 void ext4_mb_mark_bb(struct super_block *sb, ext4_fsblk_t block,
 		     int len, bool state)
 {
-	struct buffer_head *bitmap_bh = NULL;
-	struct ext4_group_desc *gdp;
-	struct buffer_head *gdp_bh;
 	struct ext4_sb_info *sbi = EXT4_SB(sb);
 	ext4_group_t group;
 	ext4_grpblk_t blkoff;
-	int i, err = 0;
-	int already;
-	unsigned int clen, clen_changed, thisgrp_len;
+	int err = 0;
+	unsigned int clen, thisgrp_len;
 
 	while (len > 0) {
 		ext4_get_group_no_and_offset(sb, block, &group, &blkoff);
@@ -4108,80 +4178,17 @@ void ext4_mb_mark_bb(struct super_block *sb, ext4_fsblk_t block,
 			ext4_error(sb, "Marking blocks in system zone - "
 				   "Block = %llu, len = %u",
 				   block, thisgrp_len);
-			bitmap_bh = NULL;
 			break;
 		}
 
-		bitmap_bh = ext4_read_block_bitmap(sb, group);
-		if (IS_ERR(bitmap_bh)) {
-			err = PTR_ERR(bitmap_bh);
-			bitmap_bh = NULL;
-			break;
-		}
-
-		err = -EIO;
-		gdp = ext4_get_group_desc(sb, group, &gdp_bh);
-		if (!gdp)
-			break;
-
-		ext4_lock_group(sb, group);
-		already = 0;
-		for (i = 0; i < clen; i++)
-			if (!mb_test_bit(blkoff + i, bitmap_bh->b_data) ==
-					 !state)
-				already++;
-
-		clen_changed = clen - already;
-		if (state)
-			mb_set_bits(bitmap_bh->b_data, blkoff, clen);
-		else
-			mb_clear_bits(bitmap_bh->b_data, blkoff, clen);
-		if (ext4_has_group_desc_csum(sb) &&
-		    (gdp->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT))) {
-			gdp->bg_flags &= cpu_to_le16(~EXT4_BG_BLOCK_UNINIT);
-			ext4_free_group_clusters_set(sb, gdp,
-			     ext4_free_clusters_after_init(sb, group, gdp));
-		}
-		if (state)
-			clen = ext4_free_group_clusters(sb, gdp) - clen_changed;
-		else
-			clen = ext4_free_group_clusters(sb, gdp) + clen_changed;
-
-		ext4_free_group_clusters_set(sb, gdp, clen);
-		ext4_block_bitmap_csum_set(sb, gdp, bitmap_bh);
-		ext4_group_desc_csum_set(sb, group, gdp);
-
-		ext4_unlock_group(sb, group);
-
-		if (sbi->s_log_groups_per_flex) {
-			ext4_group_t flex_group = ext4_flex_group(sbi, group);
-			struct flex_groups *fg = sbi_array_rcu_deref(sbi,
-						   s_flex_groups, flex_group);
-
-			if (state)
-				atomic64_sub(clen_changed, &fg->free_clusters);
-			else
-				atomic64_add(clen_changed, &fg->free_clusters);
-
-		}
-
-		err = ext4_handle_dirty_metadata(NULL, NULL, bitmap_bh);
-		if (err)
-			break;
-		sync_dirty_buffer(bitmap_bh);
-		err = ext4_handle_dirty_metadata(NULL, NULL, gdp_bh);
-		sync_dirty_buffer(gdp_bh);
+		err = ext4_mb_mark_context(sb, state, group, blkoff, clen);
 		if (err)
 			break;
 
 		block += thisgrp_len;
 		len -= thisgrp_len;
-		brelse(bitmap_bh);
 		BUG_ON(len < 0);
 	}
-
-	if (err)
-		brelse(bitmap_bh);
 }
 
 /*
