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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>
This commit is contained in:
Christopher N Bednarz 2017-03-10 12:22:03 -08:00 committed by Jeff Kirsher
parent 6030308ef8
commit 1fca3265be
1 changed files with 4 additions and 2 deletions
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6
drivers/net/ethernet/intel/i40e/i40e_main.c
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@ -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;