[PATCH net-next] ibmvnic: queue reset work in system_long_wq

[Lijun Pan]

When the linux system is under stress or the VIOS server is
responding slowly, the vnic driver may hit multiple timeouts during the
reset process. Instead of queueing the reset requests to system_wq,
queueing the relatively slow reset job to the system_long_wq.

Suggested-by: Nathan Lynch <nath...@linux.ibm.com>
Signed-off-by: Lijun Pan <lijunp...@gmail.com>
---
 drivers/net/ethernet/ibm/ibmvnic.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/ibm/ibmvnic.c 
b/drivers/net/ethernet/ibm/ibmvnic.c
index 3773dc97e63d..bbe45063b443 100644
--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -2243,8 +2243,9 @@ static void __ibmvnic_reset(struct work_struct *work)
        adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
 
        if (test_and_set_bit_lock(0, &adapter->resetting)) {
-               schedule_delayed_work(&adapter->ibmvnic_delayed_reset,
-                                     IBMVNIC_RESET_DELAY);
+               queue_delayed_work(system_long_wq,
+                                  &adapter->ibmvnic_delayed_reset,
+                                  IBMVNIC_RESET_DELAY);
                return;
        }
 
@@ -2386,7 +2387,7 @@ static int ibmvnic_reset(struct ibmvnic_adapter *adapter,
        rwi->reset_reason = reason;
        list_add_tail(&rwi->list, &adapter->rwi_list);
        netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
-       schedule_work(&adapter->ibmvnic_reset);
+       queue_work(system_long_wq, &adapter->ibmvnic_reset);
 
        ret = 0;
 err:
-- 
2.23.0