~hc/RK356X_SDK_RELEASE.git

..	..	@@ -3559,13 +3559,20 @@
3559	3559	ret = btrfs_inc_block_group_ro(cache, sctx->is_dev_replace);
3560	3560	if (ret == 0) {
3561	3561	ro_set = 1;
3562		- } else if (ret == -ENOSPC && !sctx->is_dev_replace) {
	3562	+ } else if (ret == -ENOSPC && !sctx->is_dev_replace &&
	3563	+ !(cache->flags & BTRFS_BLOCK_GROUP_RAID56_MASK)) {
3563	3564	/*
3564	3565	* btrfs_inc_block_group_ro return -ENOSPC when it
3565	3566	* failed in creating new chunk for metadata.
3566	3567	* It is not a problem for scrub, because
3567	3568	* metadata are always cowed, and our scrub paused
3568	3569	* commit_transactions.
	3570	+ *
	3571	+ * For RAID56 chunks, we have to mark them read-only
	3572	+ * for scrub, as later we would use our own cache
	3573	+ * out of RAID56 realm.
	3574	+ * Thus we want the RAID56 bg to be marked RO to
	3575	+ * prevent RMW from screwing up out cache.
3569	3576	*/
3570	3577	ro_set = 0;
3571	3578	} else if (ret == -ETXTBSY) {