i40e: Check for new arq elements before leaving the adminq subtask loop

Fix a case where we miss an arq element if a new one is added before we
enable interrupts and exit the arq subtask loop. This occurs frequently
with RDMA running on Windows VF and causes long delays that prevent SMB
from establishing connections.

Change-ID: I3e1c8b2b960c12857d9b8275bea2c1563674392e
Signed-off-by: Christopher N Bednarz <christopher.n.bednarz@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/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index 96bedb54701cbe6428be1428f8d99559021c7265..cdf36713f4d10f66d4c6a49aa581c35b810c8af0 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -6519,9 +6519,11 @@ static void i40e_clean_adminq_subtask(struct i40e_pf *pf)
                                 opcode);
                        break;
                }
-       } while (pending && (i++ < pf->adminq_work_limit));
+       } while (i++ < pf->adminq_work_limit);
+
+       if (i < pf->adminq_work_limit)
+               clear_bit(__I40E_ADMINQ_EVENT_PENDING, &pf->state);
 
-       clear_bit(__I40E_ADMINQ_EVENT_PENDING, &pf->state);
        /* re-enable Admin queue interrupt cause */
        val = rd32(hw, I40E_PFINT_ICR0_ENA);
        val |=  I40E_PFINT_ICR0_ENA_ADMINQ_MASK;