RDS: Add a warning if trying to allocate 0 sgs



rds_message_alloc_sgs() only works when nents is nonzero.

Signed-off-by: Andy Grover <andy.grover@oracle.com>

parent 372cd7de

net/rds/message.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -240,6 +240,7 @@ struct scatterlist rds_message_alloc_sgs(struct rds_message rm, int nents)
		struct scatterlist *sg_ret;

		WARN_ON(rm->m_used_sgs + nents > rm->m_total_sgs);
		WARN_ON(!nents);

		sg_ret = &sg_first[rm->m_used_sgs];
		sg_init_table(sg_ret, nents);