i40e/i40evf: Use usleep_range() instead of udelay()

As per the Documentation/timers/timers-howto.txt it is preferred to use
usleep_range() instead of udelay() if the delay value is > 10us in
non-atomic contexts.
So, replacing all the instances of udelay() with 10 or greater than 10
micro seconds delay in the driver and using usleep_range() instead.

Change-ID: Iaa2ab499a4c26f6005e5d86cc421407ef9de16c7
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Neerav Parikh <neerav.parikh@intel.com>
Tested-by: Jim Young <jamesx.m.young@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 d40fc3b..f7464e8 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -3440,7 +3440,7 @@ static int i40e_pf_txq_wait(struct i40e_pf *pf, int pf_q, bool enable)
                if (enable == !!(tx_reg & I40E_QTX_ENA_QENA_STAT_MASK))
                        break;
 
-               udelay(10);
+               usleep_range(10, 20);
        }
        if (i >= I40E_QUEUE_WAIT_RETRY_LIMIT)
                return -ETIMEDOUT;
@@ -3466,7 +3466,7 @@ static int i40e_vsi_control_tx(struct i40e_vsi *vsi, bool enable)
                /* warn the TX unit of coming changes */
                i40e_pre_tx_queue_cfg(&pf->hw, pf_q, enable);
                if (!enable)
-                       udelay(10);
+                       usleep_range(10, 20);
 
                for (j = 0; j < 50; j++) {
                        tx_reg = rd32(hw, I40E_QTX_ENA(pf_q));
@@ -3526,7 +3526,7 @@ static int i40e_pf_rxq_wait(struct i40e_pf *pf, int pf_q, bool enable)
                if (enable == !!(rx_reg & I40E_QRX_ENA_QENA_STAT_MASK))
                        break;
 
-               udelay(10);
+               usleep_range(10, 20);
        }
        if (i >= I40E_QUEUE_WAIT_RETRY_LIMIT)
                return -ETIMEDOUT;

diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
index 4eeed26..fff3c27 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -674,7 +674,7 @@ void i40e_reset_vf(struct i40e_vf *vf, bool flr)
                 * that the requested op was completed
                 * successfully
                 */
-               udelay(10);
+               usleep_range(10, 20);
                reg = rd32(hw, I40E_VPGEN_VFRSTAT(vf->vf_id));
                if (reg & I40E_VPGEN_VFRSTAT_VFRD_MASK) {
                        rsd = true;

diff --git a/drivers/net/ethernet/intel/i40evf/i40evf_main.c b/drivers/net/ethernet/intel/i40evf/i40evf_main.c
index c51bc7a..dabe6a4 100644 (file)
--- a/drivers/net/ethernet/intel/i40evf/i40evf_main.c
+++ b/drivers/net/ethernet/intel/i40evf/i40evf_main.c
@@ -1494,7 +1494,7 @@ static void i40evf_reset_task(struct work_struct *work)
 
        while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
                                &adapter->crit_section))
-               udelay(500);
+               usleep_range(500, 1000);
 
        if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
                dev_info(&adapter->pdev->dev, "Requesting reset from PF\n");
@@ -1980,7 +1980,7 @@ static int i40evf_check_reset_complete(struct i40e_hw *hw)
                if ((rstat == I40E_VFR_VFACTIVE) ||
                    (rstat == I40E_VFR_COMPLETED))
                        return 0;
-               udelay(10);
+               usleep_range(10, 20);
        }
        return -EBUSY;
 }