net/bnxt: fix ring group free

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: 9b63c6fd70e3 ("net/bnxt: support Rx/Tx queue start/stop")
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>

diff --git a/drivers/net/bnxt/bnxt_hwrm.c b/drivers/net/bnxt/bnxt_hwrm.c
index 02613bd..0e0e266 100644 (file)
--- a/drivers/net/bnxt/bnxt_hwrm.c
+++ b/drivers/net/bnxt/bnxt_hwrm.c
@@ -1897,6 +1897,9 @@ 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);