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um: get rid of the init_prio mess 

make line_setup() act on a separate array of conf strings + default conf,
have lines array initialized explicitly by that data, bury LINE_INIT()
macro from hell.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Al Viro 2011-09-09 17:25:00 -04:00 committed by Richard Weinberger
parent fe9a6b0029
commit 43574c1afe
4 changed files with 68 additions and 74 deletions
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71
arch/um/drivers/line.c
View File

@ -489,7 +489,7 @@ void close_lines(struct line *lines, int nlines)
close_chan(&lines[i].chan_list, 0);
}
static int setup_one_line(struct line *lines, int n, char *init, int init_prio,
static int setup_one_line(struct line *lines, int n, char *init,
char **error_out)
{
struct line *line = &lines[n];
@ -502,14 +502,11 @@ static int setup_one_line(struct line *lines, int n, char *init, int init_prio,
goto out;
}
if (line->init_pri <= init_prio) {
line->init_pri = init_prio;
if (!strcmp(init, "none"))
line->valid = 0;
else {
line->init_str = init;
line->valid = 1;
}
if (!strcmp(init, "none"))
line->valid = 0;
else {
line->init_str = init;
line->valid = 1;
}
err = 0;
out:
@ -524,47 +521,37 @@ out:
* @error_out is an error string in the case of failure;
*/
int line_setup(struct line *lines, unsigned int num, char *init,
char **error_out)
int line_setup(char **conf, unsigned int num, char **def,
char *init, char *name)
{
int i, n, err;
char *end;
char *error;
if (*init == '=') {
/*
* We said con=/ssl= instead of con#=, so we are configuring all
* consoles at once.
*/
n = -1;
}
else {
n = simple_strtoul(init, &end, 0);
if (*end != '=') {
*error_out = "Couldn't parse device number";
return -EINVAL;
}
init = end;
}
init++;
*def = init + 1;
} else {
char *end;
unsigned n = simple_strtoul(init, &end, 0);
if (n >= (signed int) num) {
*error_out = "Device number out of range";
return -EINVAL;
}
else if (n >= 0) {
err = setup_one_line(lines, n, init, INIT_ONE, error_out);
if (err)
return err;
}
else {
for(i = 0; i < num; i++) {
err = setup_one_line(lines, i, init, INIT_ALL,
error_out);
if (err)
return err;
if (*end != '=') {
error = "Couldn't parse device number";
goto out;
}
if (n >= num) {
error = "Device number out of range";
goto out;
}
conf[n] = end + 1;
}
return n == -1 ? num : n;
return 0;
out:
printk(KERN_ERR "Failed to set up %s with "
"configuration string \"%s\" : %s\n", name, init, error);
return -EINVAL;
}
int line_config(struct line *lines, unsigned int num, char *str,
@ -595,7 +582,7 @@ int line_config(struct line *lines, unsigned int num, char *str,
*error_out = "Failed to allocate memory";
return -ENOMEM;
}
err = setup_one_line(lines, n, new, INIT_ONE, error_out);
err = setup_one_line(lines, n, new, error_out);
if (err)
return err;
line = &lines[n];
@ -654,7 +641,7 @@ int line_remove(struct line *lines, unsigned int num, int n, char **error_out)
*error_out = "Device number out of range";
return -EINVAL;
}
return setup_one_line(lines, n, "none", INIT_ONE, error_out);
return setup_one_line(lines, n, "none", error_out);
}
struct tty_driver *register_lines(struct line_driver *line_driver,

13
arch/um/drivers/line.h
View File

@ -37,7 +37,6 @@ struct line {
int valid;
char *init_str;
int init_pri;
struct list_head chan_list;
/*This lock is actually, mostly, local to*/
@ -58,18 +57,10 @@ struct line {
int have_irq;
};
#define LINE_INIT(str, d) \
{ .count_lock = __SPIN_LOCK_UNLOCKED((str).count_lock), \
.init_str = str, \
.init_pri = INIT_STATIC, \
.valid = 1, \
.lock = __SPIN_LOCK_UNLOCKED((str).lock), \
.driver = d }
extern void line_close(struct tty_struct *tty, struct file * filp);
extern int line_open(struct line *lines, struct tty_struct *tty);
extern int line_setup(struct line *lines, unsigned int sizeof_lines,
char *init, char **error_out);
extern int line_setup(char **conf, unsigned nlines, char **def,
char *init, char *name);
extern int line_write(struct tty_struct *tty, const unsigned char *buf,
int len);
extern int line_put_char(struct tty_struct *tty, unsigned char ch);

28
arch/um/drivers/ssl.c
View File

@ -71,8 +71,9 @@ static struct line_driver driver = {
/* The array is initialized by line_init, at initcall time. The
* elements are locked individually as needed.
*/
static struct line serial_lines[NR_PORTS] =
{ [0 ... NR_PORTS - 1] = LINE_INIT(CONFIG_SSL_CHAN, &driver) };
static char *conf[NR_PORTS];
static char *def_conf = CONFIG_SSL_CHAN;
static struct line serial_lines[NR_PORTS];
static int ssl_config(char *str, char **error_out)
{
@ -186,9 +187,23 @@ static struct console ssl_cons = {
static int ssl_init(void)
{
char *new_title;
int i;
printk(KERN_INFO "Initializing software serial port version %d\n",
ssl_version);
for (i = 0; i < NR_PORTS; i++) {
char *s = conf[i];
if (!s)
s = def_conf;
if (s && strcmp(s, "none") != 0) {
serial_lines[i].init_str = s;
serial_lines[i].valid = 1;
}
spin_lock_init(&serial_lines[i].lock);
spin_lock_init(&serial_lines[i].count_lock);
serial_lines[i].driver = &driver;
}
ssl_driver = register_lines(&driver, &ssl_ops, serial_lines,
ARRAY_SIZE(serial_lines));
@ -214,14 +229,7 @@ __uml_exitcall(ssl_exit);
static int ssl_chan_setup(char *str)
{
char *error;
int ret;
ret = line_setup(serial_lines, ARRAY_SIZE(serial_lines), str, &error);
if(ret < 0)
printk(KERN_ERR "Failed to set up serial line with "
"configuration string \"%s\" : %s\n", str, error);
line_setup(conf, NR_PORTS, &def_conf, str, "serial line");
return 1;
}

30
arch/um/drivers/stdio_console.c
View File

@ -76,9 +76,9 @@ static struct line_driver driver = {
/* The array is initialized by line_init, at initcall time. The
* elements are locked individually as needed.
*/
static struct line vts[MAX_TTYS] = { LINE_INIT(CONFIG_CON_ZERO_CHAN, &driver),
[ 1 ... MAX_TTYS - 1 ] =
LINE_INIT(CONFIG_CON_CHAN, &driver) };
static char *vt_conf[MAX_TTYS];
static char *def_conf;
static struct line vts[MAX_TTYS];
static int con_config(char *str, char **error_out)
{
@ -160,7 +160,22 @@ static struct console stdiocons = {
static int stdio_init(void)
{
char *new_title;
int i;
for (i = 0; i < MAX_TTYS; i++) {
char *s = vt_conf[i];
if (!s)
s = def_conf;
if (!s)
s = i ? CONFIG_CON_CHAN : CONFIG_CON_ZERO_CHAN;
if (s && strcmp(s, "none") != 0) {
vts[i].init_str = s;
vts[i].valid = 1;
}
spin_lock_init(&vts[i].lock);
spin_lock_init(&vts[i].count_lock);
vts[i].driver = &driver;
}
console_driver = register_lines(&driver, &console_ops, vts,
ARRAY_SIZE(vts));
if (console_driver == NULL)
@ -189,14 +204,7 @@ __uml_exitcall(console_exit);
static int console_chan_setup(char *str)
{
char *error;
int ret;
ret = line_setup(vts, ARRAY_SIZE(vts), str, &error);
if(ret < 0)
printk(KERN_ERR "Failed to set up console with "
"configuration string \"%s\" : %s\n", str, error);
line_setup(vt_conf, MAX_TTYS, &def_conf, str, "console");
return 1;
}
__setup("con", console_chan_setup);