i40e: always propagate error value in i40e_set_vsi_promisc()

[ Upstream commit b6f23d3817b965bcd6d72aab1f438ff6d16a0691 ]

The for loop in i40e_set_vsi_promisc() reports errors via dev_err() but
does not propagate the error up the call chain. Instead it continues the
loop and potentially overwrites the reported error value.
This results in the error being recorded in the log buffer, but the
caller might never know anything went the wrong way.

To avoid this situation i40e_set_vsi_promisc() needs to temporarily store
the error after reporting it. This is still not optimal as multiple
different errors may occur, so store the first error and hope that's
the main issue.

Fixes: 37d318d7805f (i40e: Remove scheduling while atomic possibility)
Reported-by: Michal Schmidt <mschmidt@redhat.com>
Signed-off-by: Stefan Assmann <sassmann@kpanic.de>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
index 291ee55b125f8532c91c8670e82355d99074775f..30abaf939a76f3323fd991dc6334ff3cf778a922 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -1198,9 +1198,9 @@ static i40e_status
 i40e_set_vsi_promisc(struct i40e_vf *vf, u16 seid, bool multi_enable,
                     bool unicast_enable, s16 *vl, int num_vlans)
 {
+       i40e_status aq_ret, aq_tmp = 0;
        struct i40e_pf *pf = vf->pf;
        struct i40e_hw *hw = &pf->hw;
-       i40e_status aq_ret;
        int i;
 
        /* No VLAN to set promisc on, set on VSI */
@@ -1249,6 +1249,9 @@ i40e_set_vsi_promisc(struct i40e_vf *vf, u16 seid, bool multi_enable,
                                vf->vf_id,
                                i40e_stat_str(&pf->hw, aq_ret),
                                i40e_aq_str(&pf->hw, aq_err));
+
+                       if (!aq_tmp)
+                               aq_tmp = aq_ret;
                }
 
                aq_ret = i40e_aq_set_vsi_uc_promisc_on_vlan(hw, seid,
@@ -1262,8 +1265,15 @@ i40e_set_vsi_promisc(struct i40e_vf *vf, u16 seid, bool multi_enable,
                                vf->vf_id,
                                i40e_stat_str(&pf->hw, aq_ret),
                                i40e_aq_str(&pf->hw, aq_err));
+
+                       if (!aq_tmp)
+                               aq_tmp = aq_ret;
                }
        }
+
+       if (aq_tmp)
+               aq_ret = aq_tmp;
+
        return aq_ret;
 }