[dpdk-dev] [PATCH] net/bnxt: fix double allocation of ring groups

[Kalesh A P]

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

After commit "d68249f88266", driver allocates ring groups in
bnxt_alloc_hwrm_rx_ring(). But during port start, driver invokes
bnxt_alloc_hwrm_rx_ring() followed by bnxt_alloc_all_hwrm_ring_grps().
This will cause the FW command failure in bnxt_alloc_all_hwrm_ring_grps().

To fix this, just don't create the ring group if it is already created.

Fixes: d68249f88266 ("net/bnxt: update ring group after ring stop start")
Cc: stable at dpdk.org

Signed-off-by: Kalesh AP <kalesh-anakkur.purayil at broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde at broadcom.com>
Reviewed-by: Lance Richardson <lance.richardson at broadcom.com>
---
 drivers/net/bnxt/bnxt_hwrm.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/bnxt/bnxt_hwrm.c b/drivers/net/bnxt/bnxt_hwrm.c
index f29d574..f65dc72 100644
--- a/drivers/net/bnxt/bnxt_hwrm.c
+++ b/drivers/net/bnxt/bnxt_hwrm.c
@@ -1864,6 +1864,10 @@ int bnxt_hwrm_ring_grp_alloc(struct bnxt *bp, unsigned int idx)
 	struct hwrm_ring_grp_alloc_input req = {.req_type = 0 };
 	struct hwrm_ring_grp_alloc_output *resp = bp->hwrm_cmd_resp_addr;
 
+	/* Don't attempt to re-create the ring group if it is already created */
+	if (bp->grp_info[idx].fw_grp_id != INVALID_HW_RING_ID)
+		return 0;
+
 	HWRM_PREP(&req, HWRM_RING_GRP_ALLOC, BNXT_USE_CHIMP_MB);
 
 	req.cr = rte_cpu_to_le_16(bp->grp_info[idx].cp_fw_ring_id);
-- 
2.10.1