ice: Correctly handle return values for init DCB

In the init path for DCB, the call to ice_init_dcb()
can return a non-zero value for either an actual
error, or due to the FW lldp engine being stopped.

We are currently treating all non-zero values only as
an indication that the FW LLDP engine is stopped.

Check for an actual error in the DCB init flow.

Signed-off-by: Dave Ertman <david.m.ertman@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/ice/ice_dcb_lib.c b/drivers/net/ethernet/intel/ice/ice_dcb_lib.c
index 4614ec9..021e2e8 100644 (file)
--- a/drivers/net/ethernet/intel/ice/ice_dcb_lib.c
+++ b/drivers/net/ethernet/intel/ice/ice_dcb_lib.c
@@ -452,14 +452,18 @@ int ice_init_pf_dcb(struct ice_pf *pf, bool locked)
        port_info = hw->port_info;
 
        err = ice_init_dcb(hw);
+       if (err && !port_info->is_sw_lldp) {
+               dev_err(&pf->pdev->dev, "Error initializing DCB %d\n", err);
+               goto dcb_init_err;
+       }
+
+       dev_info(&pf->pdev->dev,
+                "DCB is enabled in the hardware, max number of TCs supported on this port are %d\n",
+                pf->hw.func_caps.common_cap.maxtc);
        if (err) {
                /* FW LLDP is disabled, activate SW DCBX/LLDP mode */
                dev_info(&pf->pdev->dev,
-                        "DCB is enabled in the hardware, max number of TCs supported on this port are %d\n",
-                        pf->hw.func_caps.common_cap.maxtc);
-               dev_info(&pf->pdev->dev,
                         "FW LLDP is disabled, DCBx/LLDP in SW mode.\n");
-               port_info->is_sw_lldp = true;
                clear_bit(ICE_FLAG_FW_LLDP_AGENT, pf->flags);
                err = ice_dcb_sw_dflt_cfg(pf, locked);
                if (err) {
@@ -475,7 +479,6 @@ int ice_init_pf_dcb(struct ice_pf *pf, bool locked)
                return 0;
        }
 
-       port_info->is_sw_lldp = false;
        set_bit(ICE_FLAG_FW_LLDP_AGENT, pf->flags);
 
        /* DCBX in FW and LLDP enabled in FW */
@@ -487,10 +490,6 @@ int ice_init_pf_dcb(struct ice_pf *pf, bool locked)
        if (err)
                goto dcb_init_err;
 
-       dev_info(&pf->pdev->dev,
-                "DCB is enabled in the hardware, max number of TCs supported on this port are %d\n",
-                pf->hw.func_caps.common_cap.maxtc);
-       dev_info(&pf->pdev->dev, "DCBX offload supported\n");
        return err;
 
 dcb_init_err: