bnxt_en: Fix RTNL lock usage on bnxt_get_port_module_status().

bnxt_get_port_module_status() calls bnxt_update_link() which expects
RTNL to be held.  In bnxt_sp_task() that does not hold RTNL, we need to
call it with a prior call to bnxt_rtnl_lock_sp() and the call needs to
be moved to the end of bnxt_sp_task().

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 69b0fce..4fcc6a8 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -6259,9 +6259,6 @@ static void bnxt_sp_task(struct work_struct *work)
                bnxt_hwrm_tunnel_dst_port_free(
                        bp, TUNNEL_DST_PORT_FREE_REQ_TUNNEL_TYPE_GENEVE);
        }
-       if (test_and_clear_bit(BNXT_HWRM_PORT_MODULE_SP_EVENT, &bp->sp_event))
-               bnxt_get_port_module_status(bp);
-
        if (test_and_clear_bit(BNXT_PERIODIC_STATS_SP_EVENT, &bp->sp_event))
                bnxt_hwrm_port_qstats(bp);
 
@@ -6283,6 +6280,12 @@ static void bnxt_sp_task(struct work_struct *work)
                        netdev_err(bp->dev, "SP task can't update link (rc: %x)\n",
                                   rc);
        }
+       if (test_and_clear_bit(BNXT_HWRM_PORT_MODULE_SP_EVENT, &bp->sp_event)) {
+               bnxt_rtnl_lock_sp(bp);
+               if (test_bit(BNXT_STATE_OPEN, &bp->state))
+                       bnxt_get_port_module_status(bp);
+               bnxt_rtnl_unlock_sp(bp);
+       }
        if (test_and_clear_bit(BNXT_RESET_TASK_SP_EVENT, &bp->sp_event))
                bnxt_reset(bp, false);