bnx2x: fix memory leak in bnx2x_init_firmware()

When cycling the interface down and up, bnx2x_init_firmware() knows that
the firmware is already loaded, but nevertheless it allocates certain
arrays anew (init_data, init_ops, init_ops_offsets, iro_arr). The old
arrays are leaked.

Fix the leaks by returning early if the firmware was already loaded.
Because if the firmware is loaded, so are the arrays.

Signed-off-by: Michal Schmidt <mschmidt@redhat.com>
Acked-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c

@@ -10824,38 +10824,36 @@ do {									\
 
 int bnx2x_init_firmware(struct bnx2x *bp)
 {
+	const char *fw_file_name;
 	struct bnx2x_fw_file_hdr *fw_hdr;
 	int rc;
 
+	if (bp->firmware)
+		return 0;
 
-	if (!bp->firmware) {
-		const char *fw_file_name;
+	if (CHIP_IS_E1(bp))
+		fw_file_name = FW_FILE_NAME_E1;
+	else if (CHIP_IS_E1H(bp))
+		fw_file_name = FW_FILE_NAME_E1H;
+	else if (!CHIP_IS_E1x(bp))
+		fw_file_name = FW_FILE_NAME_E2;
+	else {
+		BNX2X_ERR("Unsupported chip revision\n");
+		return -EINVAL;
+	}
+	BNX2X_DEV_INFO("Loading %s\n", fw_file_name);
 
-		if (CHIP_IS_E1(bp))
-			fw_file_name = FW_FILE_NAME_E1;
-		else if (CHIP_IS_E1H(bp))
-			fw_file_name = FW_FILE_NAME_E1H;
-		else if (!CHIP_IS_E1x(bp))
-			fw_file_name = FW_FILE_NAME_E2;
-		else {
-			BNX2X_ERR("Unsupported chip revision\n");
-			return -EINVAL;
-		}
-		BNX2X_DEV_INFO("Loading %s\n", fw_file_name);
+	rc = request_firmware(&bp->firmware, fw_file_name, &bp->pdev->dev);
+	if (rc) {
+		BNX2X_ERR("Can't load firmware file %s\n",
+			  fw_file_name);
+		goto request_firmware_exit;
+	}
 
-		rc = request_firmware(&bp->firmware, fw_file_name,
-				      &bp->pdev->dev);
-		if (rc) {
-			BNX2X_ERR("Can't load firmware file %s\n",
-				  fw_file_name);
-			goto request_firmware_exit;
-		}
-
-		rc = bnx2x_check_firmware(bp);
-		if (rc) {
-			BNX2X_ERR("Corrupt firmware file %s\n", fw_file_name);
-			goto request_firmware_exit;
-		}
+	rc = bnx2x_check_firmware(bp);
+	if (rc) {
+		BNX2X_ERR("Corrupt firmware file %s\n", fw_file_name);
+		goto request_firmware_exit;
 	}
 
 	fw_hdr = (struct bnx2x_fw_file_hdr *)bp->firmware->data;