[PATCH net v3 1/3] bnxt_en: Add bnxt_clear_bars() helper

[Michael Chan <michael.chan@broadcom.com>]

In bnxt_io_slot_reset(), we clear the 6 BAR registers.  Add a helper
function to do that.  The helper will be used again in the next patch.

Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com>
Reviewed-by: Joe Damato <joe@dama.to>
Signed-off-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index d7728d0c5b6e..8ce8a82d3453 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -17111,6 +17111,14 @@ void bnxt_print_device_info(struct bnxt *bp)
 	pcie_print_link_status(bp->pdev);
 }
 
+static void bnxt_clear_bars(struct pci_dev *pdev)
+{
+	int off;
+
+	for (off = PCI_BASE_ADDRESS_0; off <= PCI_BASE_ADDRESS_5; off += 4)
+		pci_write_config_dword(pdev, off, 0);
+}
+
 static int bnxt_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 {
 	struct bnxt_hw_resc *hw_resc;
@@ -17598,7 +17606,6 @@ static pci_ers_result_t bnxt_io_slot_reset(struct pci_dev *pdev)
 	struct bnxt *bp = netdev_priv(netdev);
 	int retry = 0;
 	int err = 0;
-	int off;
 
 	netdev_info(bp->dev, "PCI Slot Reset\n");
 
@@ -17627,11 +17634,8 @@ static pci_ers_result_t bnxt_io_slot_reset(struct pci_dev *pdev)
 		 * write the BARs to 0 to force restore, in case of fatal error.
 		 */
 		if (test_and_clear_bit(BNXT_STATE_PCI_CHANNEL_IO_FROZEN,
-				       &bp->state)) {
-			for (off = PCI_BASE_ADDRESS_0;
-			     off <= PCI_BASE_ADDRESS_5; off += 4)
-				pci_write_config_dword(bp->pdev, off, 0);
-		}
+				       &bp->state))
+			bnxt_clear_bars(pdev);
 		pci_restore_state(pdev);
 
 		bnxt_inv_fw_health_reg(bp);
-- 
2.51.0