i40evf: future-proof vfr_stat state check

Previously defined state I40E_VFR_VFACTIVE uses bit 1 which is now set to
"reserved."  Update the state checks to also include I40E_VFR_COMPLETED.
This change will allow the VF to work with both existing and future PFs.

Change-ID: Ifd1d34f79f3b0ffd6d2550ee4dadc55825ff52f8
Signed-off-by: Ashish Shah <ashish.n.shah@intel.com>
Tested-by: Sibai Li <sibai.li@intel.com>
Signed-off-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/intel/i40evf/i40evf_main.c b/drivers/net/ethernet/intel/i40evf/i40evf_main.c
index 937785d..4c01079 100644 (file)
--- a/drivers/net/ethernet/intel/i40evf/i40evf_main.c
+++ b/drivers/net/ethernet/intel/i40evf/i40evf_main.c
@@ -1298,12 +1298,16 @@ static void i40evf_watchdog_task(struct work_struct *work)
                                          struct i40evf_adapter,
                                          watchdog_task);
        struct i40e_hw *hw = &adapter->hw;
+       uint32_t rstat_val;
 
        if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
                goto restart_watchdog;
 
        if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
-               if ((rd32(hw, I40E_VFGEN_RSTAT) & 0x3) == I40E_VFR_VFACTIVE) {
+               rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
+                           I40E_VFGEN_RSTAT_VFR_STATE_MASK;
+               if ((rstat_val == I40E_VFR_VFACTIVE) ||
+                   (rstat_val == I40E_VFR_COMPLETED)) {
                        /* A chance for redemption! */
                        dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
                        adapter->state = __I40EVF_STARTUP;
@@ -1329,8 +1333,11 @@ static void i40evf_watchdog_task(struct work_struct *work)
                goto watchdog_done;
 
        /* check for reset */
+       rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
+                           I40E_VFGEN_RSTAT_VFR_STATE_MASK;
        if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) &&
-           (rd32(hw, I40E_VFGEN_RSTAT) & 0x3) != I40E_VFR_VFACTIVE) {
+           (rstat_val != I40E_VFR_VFACTIVE) &&
+           (rstat_val != I40E_VFR_COMPLETED)) {
                adapter->state = __I40EVF_RESETTING;
                adapter->flags |= I40EVF_FLAG_RESET_PENDING;
                dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
@@ -1496,7 +1503,8 @@ static void i40evf_reset_task(struct work_struct *work)
        for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
                rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
                            I40E_VFGEN_RSTAT_VFR_STATE_MASK;
-               if (rstat_val != I40E_VFR_VFACTIVE)
+               if ((rstat_val != I40E_VFR_VFACTIVE) &&
+                   (rstat_val != I40E_VFR_COMPLETED))
                        break;
                else
                        msleep(I40EVF_RESET_WAIT_MS);
@@ -1510,7 +1518,8 @@ static void i40evf_reset_task(struct work_struct *work)
        for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
                rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
                            I40E_VFGEN_RSTAT_VFR_STATE_MASK;
-               if (rstat_val == I40E_VFR_VFACTIVE)
+               if ((rstat_val == I40E_VFR_VFACTIVE) ||
+                   (rstat_val == I40E_VFR_COMPLETED))
                        break;
                else
                        msleep(I40EVF_RESET_WAIT_MS);
@@ -1947,8 +1956,10 @@ static int i40evf_check_reset_complete(struct i40e_hw *hw)
        int i;
 
        for (i = 0; i < 100; i++) {
-               rstat = rd32(hw, I40E_VFGEN_RSTAT);
-               if (rstat == I40E_VFR_VFACTIVE)
+               rstat = rd32(hw, I40E_VFGEN_RSTAT) &
+                           I40E_VFGEN_RSTAT_VFR_STATE_MASK;
+               if ((rstat == I40E_VFR_VFACTIVE) ||
+                   (rstat == I40E_VFR_COMPLETED))
                        return 0;
                udelay(10);
        }