bnxt_en: free hwrm resources, if driver probe fails.

When the driver probe fails, all the resources that were allocated prior
to the failure must be freed. However, hwrm dma response memory is not
getting freed.

This patch fixes the problem described above.

Fixes: c0c050c ("bnxt_en: New Broadcom ethernet driver.")
Signed-off-by: Venkat Duvvuru <venkatkumar.duvvuru@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bnxt/bnxt.c

@@ -3017,10 +3017,11 @@ static void bnxt_free_hwrm_resources(struct bnxt *bp)
 {
 	struct pci_dev *pdev = bp->pdev;
 
-	dma_free_coherent(&pdev->dev, PAGE_SIZE, bp->hwrm_cmd_resp_addr,
-			  bp->hwrm_cmd_resp_dma_addr);
-
-	bp->hwrm_cmd_resp_addr = NULL;
+	if (bp->hwrm_cmd_resp_addr) {
+		dma_free_coherent(&pdev->dev, PAGE_SIZE, bp->hwrm_cmd_resp_addr,
+				  bp->hwrm_cmd_resp_dma_addr);
+		bp->hwrm_cmd_resp_addr = NULL;
+	}
 }
 
 static int bnxt_alloc_hwrm_resources(struct bnxt *bp)
@@ -9057,6 +9058,7 @@ static int bnxt_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 	bnxt_clear_int_mode(bp);
 
 init_err_pci_clean:
+	bnxt_free_hwrm_resources(bp);
 	bnxt_cleanup_pci(bp);
 
 init_err_free: