forked from ~ljy/RK356X_SDK_RELEASE
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2024-01-31 f70575805708cabdedea7498aaa3f710fde4d920 
 kernel/drivers/net/plip/plip.c
....@@ -1,3 +1,4 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
12 /* $Id: plip.c,v 1.3.6.2 1997/04/16 15:07:56 phil Exp $ */
23 /* PLIP: A parallel port "network" driver for Linux. */
34 /* This driver is for parallel port with 5-bit cable (LapLink (R) cable). */
....@@ -29,11 +30,6 @@
2930  *		Al Viro
3031  *		  - Changed {enable,disable}_irq handling to make it work
3132  *		    with new ("stack") semantics.
32
- *
33
- *		This program is free software; you can redistribute it and/or
34
- *		modify it under the terms of the GNU General Public License
35
- *		as published by the Free Software Foundation; either version
36
- *		2 of the License, or (at your option) any later version.
3733  */
3834 
3935 /*
....@@ -146,7 +142,7 @@
146142 static void plip_interrupt(void *dev_id);
147143 
148144 /* Functions for DEV methods */
149
-static int plip_tx_packet(struct sk_buff *skb, struct net_device *dev);
145
+static netdev_tx_t plip_tx_packet(struct sk_buff *skb, struct net_device *dev);
150146 static int plip_hard_header(struct sk_buff *skb, struct net_device *dev,
151147                             unsigned short type, const void *daddr,
152148 			    const void *saddr, unsigned len);
....@@ -448,12 +444,12 @@
448444 	}
449445 	rcv->state = PLIP_PK_DONE;
450446 	if (rcv->skb) {
451
-		kfree_skb(rcv->skb);
447
+		dev_kfree_skb_irq(rcv->skb);
452448 		rcv->skb = NULL;
453449 	}
454450 	snd->state = PLIP_PK_DONE;
455451 	if (snd->skb) {
456
-		dev_kfree_skb(snd->skb);
452
+		dev_consume_skb_irq(snd->skb);
457453 		snd->skb = NULL;
458454 	}
459455 	spin_unlock_irq(&nl->lock);
....@@ -502,7 +498,7 @@
502498 		*data_p = (c0 >> 3) & 0x0f;
503499 		write_data (dev, 0x10); /* send ACK */
504500 		*ns_p = PLIP_NB_1;
505
-		/* fall through */
501
+		fallthrough;
506502 
507503 	case PLIP_NB_1:
508504 		cx = nibble_timeout;
....@@ -598,7 +594,7 @@
598594 			printk(KERN_DEBUG "%s: receive start\n", dev->name);
599595 		rcv->state = PLIP_PK_LENGTH_LSB;
600596 		rcv->nibble = PLIP_NB_BEGIN;
601
-		/* fall through */
597
+		fallthrough;
602598 
603599 	case PLIP_PK_LENGTH_LSB:
604600 		if (snd->state != PLIP_PK_DONE) {
....@@ -619,7 +615,7 @@
619615 				return TIMEOUT;
620616 		}
621617 		rcv->state = PLIP_PK_LENGTH_MSB;
622
-		/* fall through */
618
+		fallthrough;
623619 
624620 	case PLIP_PK_LENGTH_MSB:
625621 		if (plip_receive(nibble_timeout, dev,
....@@ -642,7 +638,7 @@
642638 		rcv->state = PLIP_PK_DATA;
643639 		rcv->byte = 0;
644640 		rcv->checksum = 0;
645
-		/* fall through */
641
+		fallthrough;
646642 
647643 	case PLIP_PK_DATA:
648644 		lbuf = rcv->skb->data;
....@@ -655,7 +651,7 @@
655651 			rcv->checksum += lbuf[--rcv->byte];
656652 		} while (rcv->byte);
657653 		rcv->state = PLIP_PK_CHECKSUM;
658
-		/* fall through */
654
+		fallthrough;
659655 
660656 	case PLIP_PK_CHECKSUM:
661657 		if (plip_receive(nibble_timeout, dev,
....@@ -668,7 +664,7 @@
668664 			return ERROR;
669665 		}
670666 		rcv->state = PLIP_PK_DONE;
671
-		/* fall through */
667
+		fallthrough;
672668 
673669 	case PLIP_PK_DONE:
674670 		/* Inform the upper layer for the arrival of a packet. */
....@@ -714,7 +710,7 @@
714710 	case PLIP_NB_BEGIN:
715711 		write_data (dev, data & 0x0f);
716712 		*ns_p = PLIP_NB_1;
717
-		/* fall through */
713
+		fallthrough;
718714 
719715 	case PLIP_NB_1:
720716 		write_data (dev, 0x10 | (data & 0x0f));
....@@ -729,7 +725,7 @@
729725 		}
730726 		write_data (dev, 0x10 | (data >> 4));
731727 		*ns_p = PLIP_NB_2;
732
-		/* fall through */
728
+		fallthrough;
733729 
734730 	case PLIP_NB_2:
735731 		write_data (dev, (data >> 4));
....@@ -818,7 +814,7 @@
818814 			      &snd->nibble, snd->length.b.lsb))
819815 			return TIMEOUT;
820816 		snd->state = PLIP_PK_LENGTH_MSB;
821
-		/* fall through */
817
+		fallthrough;
822818 
823819 	case PLIP_PK_LENGTH_MSB:
824820 		if (plip_send(nibble_timeout, dev,
....@@ -827,7 +823,7 @@
827823 		snd->state = PLIP_PK_DATA;
828824 		snd->byte = 0;
829825 		snd->checksum = 0;
830
-		/* fall through */
826
+		fallthrough;
831827 
832828 	case PLIP_PK_DATA:
833829 		do {
....@@ -839,7 +835,7 @@
839835 			snd->checksum += lbuf[--snd->byte];
840836 		} while (snd->byte);
841837 		snd->state = PLIP_PK_CHECKSUM;
842
-		/* fall through */
838
+		fallthrough;
843839 
844840 	case PLIP_PK_CHECKSUM:
845841 		if (plip_send(nibble_timeout, dev,
....@@ -850,7 +846,7 @@
850846 		dev_kfree_skb(snd->skb);
851847 		dev->stats.tx_packets++;
852848 		snd->state = PLIP_PK_DONE;
853
-		/* fall through */
849
+		fallthrough;
854850 
855851 	case PLIP_PK_DONE:
856852 		/* Close the connection */
....@@ -939,7 +935,7 @@
939935 	switch (nl->connection) {
940936 	case PLIP_CN_CLOSING:
941937 		netif_wake_queue (dev);
942
-		/* fall through */
938
+		fallthrough;
943939 	case PLIP_CN_NONE:
944940 	case PLIP_CN_SEND:
945941 		rcv->state = PLIP_PK_TRIGGER;
....@@ -962,7 +958,7 @@
962958 	spin_unlock_irqrestore(&nl->lock, flags);
963959 }
964960 
965
-static int
961
+static netdev_tx_t
966962 plip_tx_packet(struct sk_buff *skb, struct net_device *dev)
967963 {
968964 	struct net_local *nl = netdev_priv(dev);
....@@ -1012,7 +1008,7 @@
10121008 	in_dev = __in_dev_get_rcu(dev);
10131009 	if (in_dev) {
10141010 		/* Any address will do - we take the first */
1015
-		const struct in_ifaddr *ifa = in_dev->ifa_list;
1011
+		const struct in_ifaddr *ifa = rcu_dereference(in_dev->ifa_list);
10161012 		if (ifa) {
10171013 			memcpy(eth->h_source, dev->dev_addr, ETH_ALEN);
10181014 			memset(eth->h_dest, 0xfc, 2);
....@@ -1107,7 +1103,7 @@
11071103 		/* Any address will do - we take the first. We already
11081104 		   have the first two bytes filled with 0xfc, from
11091105 		   plip_init_dev(). */
1110
-		struct in_ifaddr *ifa=in_dev->ifa_list;
1106
+		const struct in_ifaddr *ifa = rtnl_dereference(in_dev->ifa_list);
11111107 		if (ifa != NULL) {
11121108 			memcpy(dev->dev_addr+2, &ifa->ifa_local, 4);
11131109 		}