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hc
2024-05-11 04dd17822334871b23ea2862f7798fb0e0007777 
 kernel/drivers/net/usb/smsc75xx.c
....@@ -1,19 +1,7 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
12  /***************************************************************************
23  *
34  * Copyright (C) 2007-2010 SMSC
4
- *
5
- * This program is free software; you can redistribute it and/or
6
- * modify it under the terms of the GNU General Public License
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- * as published by the Free Software Foundation; either version 2
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- * of the License, or (at your option) any later version.
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- * GNU General Public License for more details.
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- *
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- * You should have received a copy of the GNU General Public License
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- * along with this program; if not, see <http://www.gnu.org/licenses/>.
175  *
186  *****************************************************************************/
197 
....@@ -102,7 +90,9 @@
10290 	ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
10391 		 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
10492 		 0, index, &buf, 4);
105
-	if (unlikely(ret < 0)) {
93
+	if (unlikely(ret < 4)) {
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+		ret = ret < 0 ? ret : -ENODATA;
95
+
10696 		netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
10797 			    index, ret);
10898 		return ret;
....@@ -673,8 +663,7 @@
673663 		return;
674664 	}
675665 
676
-	memcpy(&intdata, urb->transfer_buffer, 4);
677
-	le32_to_cpus(&intdata);
666
+	intdata = get_unaligned_le32(urb->transfer_buffer);
678667 
679668 	netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
680669 
....@@ -770,13 +759,14 @@
770759 
771760 static void smsc75xx_init_mac_address(struct usbnet *dev)
772761 {
773
-	const u8 *mac_addr;
774
-
775762 	/* maybe the boot loader passed the MAC address in devicetree */
776
-	mac_addr = of_get_mac_address(dev->udev->dev.of_node);
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-	if (mac_addr) {
778
-		memcpy(dev->net->dev_addr, mac_addr, ETH_ALEN);
779
-		return;
763
+	if (!eth_platform_get_mac_address(&dev->udev->dev,
764
+			dev->net->dev_addr)) {
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+		if (is_valid_ether_addr(dev->net->dev_addr)) {
766
+			/* device tree values are valid so use them */
767
+			netif_dbg(dev, ifup, dev->net, "MAC address read from the device tree\n");
768
+			return;
769
+		}
780770 	}
781771 
782772 	/* try reading mac address from EEPROM */
....@@ -2199,12 +2189,10 @@
21992189 		struct sk_buff *ax_skb;
22002190 		unsigned char *packet;
22012191 
2202
-		memcpy(&rx_cmd_a, skb->data, sizeof(rx_cmd_a));
2203
-		le32_to_cpus(&rx_cmd_a);
2192
+		rx_cmd_a = get_unaligned_le32(skb->data);
22042193 		skb_pull(skb, 4);
22052194 
2206
-		memcpy(&rx_cmd_b, skb->data, sizeof(rx_cmd_b));
2207
-		le32_to_cpus(&rx_cmd_b);
2195
+		rx_cmd_b = get_unaligned_le32(skb->data);
22082196 		skb_pull(skb, 4 + RXW_PADDING);
22092197 
22102198 		packet = skb->data;
....@@ -2212,6 +2200,13 @@
22122200 		/* get the packet length */
22132201 		size = (rx_cmd_a & RX_CMD_A_LEN) - RXW_PADDING;
22142202 		align_count = (4 - ((size + RXW_PADDING) % 4)) % 4;
2203
+
2204
+		if (unlikely(size > skb->len)) {
2205
+			netif_dbg(dev, rx_err, dev->net,
2206
+				  "size err rx_cmd_a=0x%08x\n",
2207
+				  rx_cmd_a);
2208
+			return 0;
2209
+		}
22152210 
22162211 		if (unlikely(rx_cmd_a & RX_CMD_A_RED)) {
22172212 			netif_dbg(dev, rx_err, dev->net,
....@@ -2276,6 +2271,7 @@
22762271 					 struct sk_buff *skb, gfp_t flags)
22772272 {
22782273 	u32 tx_cmd_a, tx_cmd_b;
2274
+	void *ptr;
22792275 
22802276 	if (skb_cow_head(skb, SMSC75XX_TX_OVERHEAD)) {
22812277 		dev_kfree_skb_any(skb);
....@@ -2296,13 +2292,9 @@
22962292 		tx_cmd_b = 0;
22972293 	}
22982294 
2299
-	skb_push(skb, 4);
2300
-	cpu_to_le32s(&tx_cmd_b);
2301
-	memcpy(skb->data, &tx_cmd_b, 4);
2302
-
2303
-	skb_push(skb, 4);
2304
-	cpu_to_le32s(&tx_cmd_a);
2305
-	memcpy(skb->data, &tx_cmd_a, 4);
2295
+	ptr = skb_push(skb, 8);
2296
+	put_unaligned_le32(tx_cmd_a, ptr);
2297
+	put_unaligned_le32(tx_cmd_b, ptr + 4);
23062298 
23072299 	return skb;
23082300 }