Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/net/ethernet/alacritech/slicoss.c b/drivers/net/ethernet/alacritech/slicoss.c
index 0b60921..80ef3e1 100644
--- a/drivers/net/ethernet/alacritech/slicoss.c
+++ b/drivers/net/ethernet/alacritech/slicoss.c
@@ -1,19 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Driver for Gigabit Ethernet adapters based on the Session Layer
  * Interface (SLIC) technology by Alacritech. The driver does not
  * support the hardware acceleration features provided by these cards.
  *
  * Copyright (C) 2016 Lino Sanfilippo <LinoSanfilippo@gmx.de>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
  */
 
 #include <linux/kernel.h>
@@ -345,8 +336,6 @@
 	if (sdev->promisc != set_promisc) {
 		sdev->promisc = set_promisc;
 		slic_configure_rcv(sdev);
-		/* make sure writes to receiver cant leak out of the lock */
-		mmiowb();
 	}
 	spin_unlock_bh(&sdev->link_lock);
 }
@@ -795,8 +784,8 @@
 	size = stq->len * sizeof(*descs) + DESC_ALIGN_MASK;
 
 	for (i = 0; i < SLIC_NUM_STAT_DESC_ARRAYS; i++) {
-		descs = dma_zalloc_coherent(&sdev->pdev->dev, size, &paddr,
-					    GFP_KERNEL);
+		descs = dma_alloc_coherent(&sdev->pdev->dev, size, &paddr,
+					   GFP_KERNEL);
 		if (!descs) {
 			netdev_err(sdev->netdev,
 				   "failed to allocate status descriptors\n");
@@ -1240,8 +1229,8 @@
 	struct slic_shmem_data *sm_data;
 	dma_addr_t paddr;
 
-	sm_data = dma_zalloc_coherent(&sdev->pdev->dev, sizeof(*sm_data),
-				      &paddr, GFP_KERNEL);
+	sm_data = dma_alloc_coherent(&sdev->pdev->dev, sizeof(*sm_data),
+				     &paddr, GFP_KERNEL);
 	if (!sm_data) {
 		dev_err(&sdev->pdev->dev, "failed to allocate shared memory\n");
 		return -ENOMEM;
@@ -1461,8 +1450,6 @@
 
 	if (slic_get_free_tx_descs(txq) < SLIC_MAX_REQ_TX_DESCS)
 		netif_stop_queue(dev);
-	/* make sure writes to io-memory cant leak out of tx queue lock */
-	mmiowb();
 
 	return NETDEV_TX_OK;
 drop_skb:
@@ -1621,8 +1608,8 @@
 	int err = 0;
 	u8 *mac[2];
 
-	eeprom = dma_zalloc_coherent(&sdev->pdev->dev, SLIC_EEPROM_SIZE,
-				     &paddr, GFP_KERNEL);
+	eeprom = dma_alloc_coherent(&sdev->pdev->dev, SLIC_EEPROM_SIZE,
+				    &paddr, GFP_KERNEL);
 	if (!eeprom)
 		return -ENOMEM;