Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /* Copyright 2011-2014 Autronica Fire and Security AS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * Author(s):
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *	2011-2014 Arvid Brodin, arvid.brodin@alten.se
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * Frame handler other utility functions for HSR and PRP.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include "hsr_slave.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/etherdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/if_arp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/if_vlan.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include "hsr_main.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include "hsr_device.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include "hsr_forward.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include "hsr_framereg.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) bool hsr_invalid_dan_ingress_frame(__be16 protocol)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 	return (protocol != htons(ETH_P_PRP) && protocol != htons(ETH_P_HSR));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) static rx_handler_result_t hsr_handle_frame(struct sk_buff **pskb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 	struct sk_buff *skb = *pskb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	struct hsr_port *port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	struct hsr_priv *hsr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	__be16 protocol;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	/* Packets from dev_loopback_xmit() do not have L2 header, bail out */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	if (unlikely(skb->pkt_type == PACKET_LOOPBACK))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 		return RX_HANDLER_PASS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	if (!skb_mac_header_was_set(skb)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 		WARN_ONCE(1, "%s: skb invalid", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 		return RX_HANDLER_PASS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	port = hsr_port_get_rcu(skb->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	if (!port)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 		goto finish_pass;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	hsr = port->hsr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	if (hsr_addr_is_self(port->hsr, eth_hdr(skb)->h_source)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 		/* Directly kill frames sent by ourselves */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 		kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 		goto finish_consume;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	/* For HSR, only tagged frames are expected, but for PRP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	 * there could be non tagged frames as well from Single
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	 * attached nodes (SANs).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	protocol = eth_hdr(skb)->h_proto;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	if (hsr->proto_ops->invalid_dan_ingress_frame &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	    hsr->proto_ops->invalid_dan_ingress_frame(protocol))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 		goto finish_pass;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	skb_push(skb, ETH_HLEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	skb_reset_mac_header(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	if ((!hsr->prot_version && protocol == htons(ETH_P_PRP)) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	    protocol == htons(ETH_P_HSR))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 		skb_set_network_header(skb, ETH_HLEN + HSR_HLEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	skb_reset_mac_len(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	hsr_forward_skb(skb, port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) finish_consume:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	return RX_HANDLER_CONSUMED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) finish_pass:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	return RX_HANDLER_PASS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) bool hsr_port_exists(const struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	return rcu_access_pointer(dev->rx_handler) == hsr_handle_frame;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) static int hsr_check_dev_ok(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 			    struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	/* Don't allow HSR on non-ethernet like devices */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	if ((dev->flags & IFF_LOOPBACK) || dev->type != ARPHRD_ETHER ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	    dev->addr_len != ETH_ALEN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 		NL_SET_ERR_MSG_MOD(extack, "Cannot use loopback or non-ethernet device as HSR slave.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	/* Don't allow enslaving hsr devices */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	if (is_hsr_master(dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 		NL_SET_ERR_MSG_MOD(extack,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 				   "Cannot create trees of HSR devices.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	if (hsr_port_exists(dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 		NL_SET_ERR_MSG_MOD(extack,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 				   "This device is already a HSR slave.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	if (is_vlan_dev(dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 		NL_SET_ERR_MSG_MOD(extack, "HSR on top of VLAN is not yet supported in this driver.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	if (dev->priv_flags & IFF_DONT_BRIDGE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 		NL_SET_ERR_MSG_MOD(extack,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 				   "This device does not support bridging.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 		return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	/* HSR over bonded devices has not been tested, but I'm not sure it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	 * won't work...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) /* Setup device to be added to the HSR bridge. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) static int hsr_portdev_setup(struct hsr_priv *hsr, struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 			     struct hsr_port *port,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 			     struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	struct net_device *hsr_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	struct hsr_port *master;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	int res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	res = dev_set_promiscuity(dev, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	if (res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 		return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	master = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	hsr_dev = master->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	res = netdev_upper_dev_link(dev, hsr_dev, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	if (res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 		goto fail_upper_dev_link;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	res = netdev_rx_handler_register(dev, hsr_handle_frame, port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	if (res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 		goto fail_rx_handler;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	dev_disable_lro(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) fail_rx_handler:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	netdev_upper_dev_unlink(dev, hsr_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) fail_upper_dev_link:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	dev_set_promiscuity(dev, -1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) int hsr_add_port(struct hsr_priv *hsr, struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 		 enum hsr_port_type type, struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	struct hsr_port *port, *master;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	int res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	if (type != HSR_PT_MASTER) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 		res = hsr_check_dev_ok(dev, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 		if (res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 			return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	port = hsr_port_get_hsr(hsr, type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	if (port)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 		return -EBUSY;	/* This port already exists */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	port = kzalloc(sizeof(*port), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	if (!port)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	port->hsr = hsr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	port->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	port->type = type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	if (type != HSR_PT_MASTER) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 		res = hsr_portdev_setup(hsr, dev, port, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 		if (res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 			goto fail_dev_setup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	list_add_tail_rcu(&port->port_list, &hsr->ports);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	synchronize_rcu();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	master = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	netdev_update_features(master->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	dev_set_mtu(master->dev, hsr_get_max_mtu(hsr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) fail_dev_setup:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	kfree(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) void hsr_del_port(struct hsr_port *port)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	struct hsr_priv *hsr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	struct hsr_port *master;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	hsr = port->hsr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	master = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	list_del_rcu(&port->port_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	if (port != master) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 		netdev_update_features(master->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 		dev_set_mtu(master->dev, hsr_get_max_mtu(hsr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 		netdev_rx_handler_unregister(port->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 		dev_set_promiscuity(port->dev, -1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 		netdev_upper_dev_unlink(port->dev, master->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	synchronize_rcu();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	kfree(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) }