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Diffstat (limited to 'arch/um/drivers/port_kern.c')
-rw-r--r--arch/um/drivers/port_kern.c86
1 files changed, 41 insertions, 45 deletions
diff --git a/arch/um/drivers/port_kern.c b/arch/um/drivers/port_kern.c
index 1c8efd95c42..330543b3129 100644
--- a/arch/um/drivers/port_kern.c
+++ b/arch/um/drivers/port_kern.c
@@ -1,24 +1,16 @@
/*
- * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
+ * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{linux.intel,addtoit}.com)
* Licensed under the GPL
*/
-#include "linux/list.h"
-#include "linux/sched.h"
-#include "linux/slab.h"
+#include "linux/completion.h"
#include "linux/interrupt.h"
-#include "linux/spinlock.h"
-#include "linux/errno.h"
+#include "linux/list.h"
#include "asm/atomic.h"
-#include "asm/semaphore.h"
-#include "asm/errno.h"
-#include "kern_util.h"
-#include "kern.h"
-#include "irq_user.h"
-#include "irq_kern.h"
-#include "port.h"
#include "init.h"
+#include "irq_kern.h"
#include "os.h"
+#include "port.h"
struct port_list {
struct list_head list;
@@ -53,8 +45,8 @@ static irqreturn_t pipe_interrupt(int irq, void *data)
int fd;
fd = os_rcv_fd(conn->socket[0], &conn->helper_pid);
- if(fd < 0){
- if(fd == -EAGAIN)
+ if (fd < 0) {
+ if (fd == -EAGAIN)
return IRQ_NONE;
printk(KERN_ERR "pipe_interrupt : os_rcv_fd returned %d\n",
@@ -81,18 +73,18 @@ static irqreturn_t pipe_interrupt(int irq, void *data)
static int port_accept(struct port_list *port)
{
struct connection *conn;
- int fd, socket[2], pid, ret = 0;
+ int fd, socket[2], pid;
fd = port_connection(port->fd, socket, &pid);
- if(fd < 0){
- if(fd != -EAGAIN)
+ if (fd < 0) {
+ if (fd != -EAGAIN)
printk(KERN_ERR "port_accept : port_connection "
"returned %d\n", -fd);
goto out;
}
conn = kmalloc(sizeof(*conn), GFP_ATOMIC);
- if(conn == NULL){
+ if (conn == NULL) {
printk(KERN_ERR "port_accept : failed to allocate "
"connection\n");
goto out_close;
@@ -104,17 +96,17 @@ static int port_accept(struct port_list *port)
.telnetd_pid = pid,
.port = port });
- if(um_request_irq(TELNETD_IRQ, socket[0], IRQ_READ, pipe_interrupt,
+ if (um_request_irq(TELNETD_IRQ, socket[0], IRQ_READ, pipe_interrupt,
IRQF_DISABLED | IRQF_SHARED | IRQF_SAMPLE_RANDOM,
- "telnetd", conn)){
+ "telnetd", conn)) {
printk(KERN_ERR "port_accept : failed to get IRQ for "
"telnetd\n");
goto out_free;
}
- if(atomic_read(&port->wait_count) == 0){
+ if (atomic_read(&port->wait_count) == 0) {
os_write_file(fd, NO_WAITER_MSG, sizeof(NO_WAITER_MSG));
- printk("No one waiting for port\n");
+ printk(KERN_ERR "No one waiting for port\n");
}
list_add(&conn->list, &port->pending);
return 1;
@@ -123,28 +115,29 @@ static int port_accept(struct port_list *port)
kfree(conn);
out_close:
os_close_file(fd);
- if(pid != -1)
- os_kill_process(pid, 1);
+ os_kill_process(pid, 1);
out:
- return ret;
+ return 0;
}
static DECLARE_MUTEX(ports_sem);
static LIST_HEAD(ports);
-void port_work_proc(struct work_struct *unused)
+static void port_work_proc(struct work_struct *unused)
{
struct port_list *port;
struct list_head *ele;
unsigned long flags;
local_irq_save(flags);
- list_for_each(ele, &ports){
+ list_for_each(ele, &ports) {
port = list_entry(ele, struct port_list, list);
- if(!port->has_connection)
+ if (!port->has_connection)
continue;
+
reactivate_fd(port->fd, ACCEPT_IRQ);
- while(port_accept(port)) ;
+ while (port_accept(port))
+ ;
port->has_connection = 0;
}
local_irq_restore(flags);
@@ -169,25 +162,27 @@ void *port_data(int port_num)
int fd;
down(&ports_sem);
- list_for_each(ele, &ports){
+ list_for_each(ele, &ports) {
port = list_entry(ele, struct port_list, list);
- if(port->port == port_num) goto found;
+ if (port->port == port_num)
+ goto found;
}
port = kmalloc(sizeof(struct port_list), GFP_KERNEL);
- if(port == NULL){
+ if (port == NULL) {
printk(KERN_ERR "Allocation of port list failed\n");
goto out;
}
fd = port_listen_fd(port_num);
- if(fd < 0){
+ if (fd < 0) {
printk(KERN_ERR "binding to port %d failed, errno = %d\n",
port_num, -fd);
goto out_free;
}
- if(um_request_irq(ACCEPT_IRQ, fd, IRQ_READ, port_interrupt,
+
+ if (um_request_irq(ACCEPT_IRQ, fd, IRQ_READ, port_interrupt,
IRQF_DISABLED | IRQF_SHARED | IRQF_SAMPLE_RANDOM,
- "port", port)){
+ "port", port)) {
printk(KERN_ERR "Failed to get IRQ for port %d\n", port_num);
goto out_close;
}
@@ -206,7 +201,7 @@ void *port_data(int port_num)
found:
dev = kmalloc(sizeof(struct port_dev), GFP_KERNEL);
- if(dev == NULL){
+ if (dev == NULL) {
printk(KERN_ERR "Allocation of port device entry failed\n");
goto out;
}
@@ -216,10 +211,10 @@ void *port_data(int port_num)
.telnetd_pid = -1 });
goto out;
- out_free:
- kfree(port);
out_close:
os_close_file(fd);
+ out_free:
+ kfree(port);
out:
up(&ports_sem);
return dev;
@@ -233,9 +228,9 @@ int port_wait(void *data)
int fd;
atomic_inc(&port->wait_count);
- while(1){
+ while (1) {
fd = -ERESTARTSYS;
- if(wait_for_completion_interruptible(&port->done))
+ if (wait_for_completion_interruptible(&port->done))
goto out;
spin_lock(&port->lock);
@@ -258,7 +253,8 @@ int port_wait(void *data)
*/
free_irq(TELNETD_IRQ, conn);
- if(conn->fd >= 0) break;
+ if (conn->fd >= 0)
+ break;
os_close_file(conn->fd);
kfree(conn);
}
@@ -276,9 +272,9 @@ void port_remove_dev(void *d)
{
struct port_dev *dev = d;
- if(dev->helper_pid != -1)
+ if (dev->helper_pid != -1)
os_kill_process(dev->helper_pid, 0);
- if(dev->telnetd_pid != -1)
+ if (dev->telnetd_pid != -1)
os_kill_process(dev->telnetd_pid, 1);
dev->helper_pid = -1;
dev->telnetd_pid = -1;
@@ -297,7 +293,7 @@ static void free_port(void)
struct list_head *ele;
struct port_list *port;
- list_for_each(ele, &ports){
+ list_for_each(ele, &ports) {
port = list_entry(ele, struct port_list, list);
free_irq_by_fd(port->fd);
os_close_file(port->fd);
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-12 10:34:02 +0000