i40e: Fix for Tools loopback test failing after driver load

This patch fixes a problem where our Tools MAC Loopback test, after
driver unbind would fail.  This was because the hw was configured
for multiqueue and unbind operation did not clear this configuration.
The problem is fixed by resetting this configuration in i40e_remove.

Change-ID: I130c05138319182ed1476d3a0b5222d6a6320af9
Signed-off-by: Carolyn Wyborny <carolyn.wyborny@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 e0142de018e6fccf000bd964002926390b0dd8cf..5157be51e8295e86d04dd0a9617a4b4d84945000 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -10630,6 +10630,7 @@ err_dma:
 static void i40e_remove(struct pci_dev *pdev)
 {
        struct i40e_pf *pf = pci_get_drvdata(pdev);
+       struct i40e_hw *hw = &pf->hw;
        i40e_status ret_code;
        int i;
 
@@ -10637,6 +10638,10 @@ static void i40e_remove(struct pci_dev *pdev)
 
        i40e_ptp_stop(pf);
 
+       /* Disable RSS in hw */
+       wr32(hw, I40E_PFQF_HENA(0), 0);
+       wr32(hw, I40E_PFQF_HENA(1), 0);
+
        /* no more scheduling of any task */
        set_bit(__I40E_DOWN, &pf->state);
        del_timer_sync(&pf->service_timer);