[dpdk-stable] [PATCH v1] net/iavf: fix RSS queue region size exceeds

[Ting Xu <ting.xu@intel.com>]

When a rule is set to do RSS to redirect flows to a group of queues, the
queue region size should not be larger than the max RSS queue region
supported by HW. This patch added the step to check the queue region
size, and report failure if the size does not meet the requirement.

Fixes: e436cd43835b ("net/iavf: negotiate large VF and request more queues")
Cc: stable@dpdk.org

Signed-off-by: Ting Xu <ting.xu@intel.com>
---
 drivers/net/iavf/iavf_fdir.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/net/iavf/iavf_fdir.c b/drivers/net/iavf/iavf_fdir.c
index f584e5624c..d683a468c1 100644
--- a/drivers/net/iavf/iavf_fdir.c
+++ b/drivers/net/iavf/iavf_fdir.c
@@ -256,6 +256,7 @@ iavf_fdir_parse_action_qregion(struct iavf_adapter *ad,
 			const struct rte_flow_action *act,
 			struct virtchnl_filter_action *filter_action)
 {
+	struct iavf_info *vf = IAVF_DEV_PRIVATE_TO_VF(ad);
 	const struct rte_flow_action_rss *rss = act->conf;
 	uint32_t i;
 
@@ -300,6 +301,13 @@ iavf_fdir_parse_action_qregion(struct iavf_adapter *ad,
 		return -rte_errno;
 	}
 
+	if (rss->queue_num > vf->max_rss_qregion) {
+		rte_flow_error_set(error, EINVAL,
+				RTE_FLOW_ERROR_TYPE_ACTION, act,
+				"The region size cannot be large than the supported max RSS queue region");
+		return -rte_errno;
+	}
+
 	filter_action->act_conf.queue.index = rss->queue[0];
 	filter_action->act_conf.queue.region = rte_fls_u32(rss->queue_num) - 1;
 
-- 
2.17.1