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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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f12ad7d59a
ioremap must be balanced by an iounmap and failing to do so can result in a memory leak. Signed-off-by: Amol Lad <amol@verismonetworks.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
144 lines
3.2 KiB
C
144 lines
3.2 KiB
C
/*
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* linux/drivers/serial/acorn.c
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*
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* Copyright (C) 1996-2003 Russell King.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/tty.h>
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#include <linux/serial_core.h>
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#include <linux/errno.h>
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#include <linux/ioport.h>
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#include <linux/slab.h>
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#include <linux/device.h>
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#include <linux/init.h>
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#include <asm/io.h>
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#include <asm/ecard.h>
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#include <asm/string.h>
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#include "8250.h"
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#define MAX_PORTS 3
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struct serial_card_type {
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unsigned int num_ports;
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unsigned int uartclk;
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unsigned int type;
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unsigned int offset[MAX_PORTS];
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};
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struct serial_card_info {
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unsigned int num_ports;
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int ports[MAX_PORTS];
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void __iomem *vaddr;
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};
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static int __devinit
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serial_card_probe(struct expansion_card *ec, const struct ecard_id *id)
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{
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struct serial_card_info *info;
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struct serial_card_type *type = id->data;
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struct uart_port port;
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unsigned long bus_addr;
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unsigned int i;
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info = kmalloc(sizeof(struct serial_card_info), GFP_KERNEL);
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if (!info)
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return -ENOMEM;
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memset(info, 0, sizeof(struct serial_card_info));
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info->num_ports = type->num_ports;
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bus_addr = ecard_resource_start(ec, type->type);
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info->vaddr = ioremap(bus_addr, ecard_resource_len(ec, type->type));
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if (!info->vaddr) {
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kfree(info);
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return -ENOMEM;
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}
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ecard_set_drvdata(ec, info);
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memset(&port, 0, sizeof(struct uart_port));
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port.irq = ec->irq;
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port.flags = UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ;
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port.uartclk = type->uartclk;
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port.iotype = UPIO_MEM;
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port.regshift = 2;
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port.dev = &ec->dev;
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for (i = 0; i < info->num_ports; i ++) {
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port.membase = info->vaddr + type->offset[i];
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port.mapbase = bus_addr + type->offset[i];
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info->ports[i] = serial8250_register_port(&port);
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}
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return 0;
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}
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static void __devexit serial_card_remove(struct expansion_card *ec)
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{
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struct serial_card_info *info = ecard_get_drvdata(ec);
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int i;
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ecard_set_drvdata(ec, NULL);
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for (i = 0; i < info->num_ports; i++)
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if (info->ports[i] > 0)
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serial8250_unregister_port(info->ports[i]);
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iounmap(info->vaddr);
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kfree(info);
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}
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static struct serial_card_type atomwide_type = {
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.num_ports = 3,
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.uartclk = 7372800,
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.type = ECARD_RES_IOCSLOW,
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.offset = { 0x2800, 0x2400, 0x2000 },
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};
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static struct serial_card_type serport_type = {
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.num_ports = 2,
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.uartclk = 3686400,
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.type = ECARD_RES_IOCSLOW,
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.offset = { 0x2000, 0x2020 },
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};
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static const struct ecard_id serial_cids[] = {
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{ MANU_ATOMWIDE, PROD_ATOMWIDE_3PSERIAL, &atomwide_type },
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{ MANU_SERPORT, PROD_SERPORT_DSPORT, &serport_type },
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{ 0xffff, 0xffff }
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};
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static struct ecard_driver serial_card_driver = {
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.probe = serial_card_probe,
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.remove = __devexit_p(serial_card_remove),
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.id_table = serial_cids,
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.drv = {
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.name = "8250_acorn",
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},
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};
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static int __init serial_card_init(void)
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{
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return ecard_register_driver(&serial_card_driver);
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}
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static void __exit serial_card_exit(void)
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{
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ecard_remove_driver(&serial_card_driver);
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}
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MODULE_AUTHOR("Russell King");
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MODULE_DESCRIPTION("Acorn 8250-compatible serial port expansion card driver");
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MODULE_LICENSE("GPL");
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module_init(serial_card_init);
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module_exit(serial_card_exit);
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