[dpdk-dev] [PATCH] net/bnxt: fix ring group free

[Kalesh A P <kalesh-anakkur.purayil@broadcom.com>]

From: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>

Added an invalid fw_grp_id check inside bnxt_hwrm_ring_grp_free().
This will prevent invalid fw_grp_id to be passed to the FW which can
result in an error.
This fixes the following failure in the "port stop" -> "port start"
sequence:

bnxt_hwrm_ring_grp_free(): error 2:0:00000000:0204
bnxt_hwrm_ring_grp_free(): error 2:0:00000000:0204

Fixes: 5803d86b87df ("net/bnxt: update ring group after ring stop start")
Cc: stable@dpdk.org

Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
Reviewed-by: Lance Richardson <lance.richardson@broadcom.com>
Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com>
---
 drivers/net/bnxt/bnxt_hwrm.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/bnxt/bnxt_hwrm.c b/drivers/net/bnxt/bnxt_hwrm.c
index f29d574..d092fdc 100644
--- a/drivers/net/bnxt/bnxt_hwrm.c
+++ b/drivers/net/bnxt/bnxt_hwrm.c
@@ -1888,6 +1888,9 @@ int bnxt_hwrm_ring_grp_free(struct bnxt *bp, unsigned int idx)
 	struct hwrm_ring_grp_free_input req = {.req_type = 0 };
 	struct hwrm_ring_grp_free_output *resp = bp->hwrm_cmd_resp_addr;
 
+	if (bp->grp_info[idx].fw_grp_id == INVALID_HW_RING_ID)
+		return 0;
+
 	HWRM_PREP(&req, HWRM_RING_GRP_FREE, BNXT_USE_CHIMP_MB);
 
 	req.ring_group_id = rte_cpu_to_le_16(bp->grp_info[idx].fw_grp_id);
-- 
2.10.1