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>

4 files changed, 68 insertions, 74 deletions

diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c
index b0022cf4efbb..3eea99e98a11 100644
--- a/arch/um/drivers/line.c
+++ b/arch/um/drivers/line.c
@@ -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);
+                *def = init + 1;
+        } else {
+                char *end;
+                unsigned n = simple_strtoul(init, &end, 0);
+
                 if (*end != '=') {
-                        *error_out = "Couldn't parse device number";
-                        return -EINVAL;
+                        error = "Couldn't parse device number";
+                        goto out;
                 }
-                init = end;
-        }
-        init++;
-
-        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 (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,
diff --git a/arch/um/drivers/line.h b/arch/um/drivers/line.h
index 63df3ca02ac2..0c4dadf5e03e 100644
--- a/arch/um/drivers/line.h
+++ b/arch/um/drivers/line.h
@@ -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);
diff --git a/arch/um/drivers/ssl.c b/arch/um/drivers/ssl.c
index 9d8c20af6f80..445288ff0650 100644
--- a/arch/um/drivers/ssl.c
+++ b/arch/um/drivers/ssl.c
@@ -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;
 }
 
diff --git a/arch/um/drivers/stdio_console.c b/arch/um/drivers/stdio_console.c
index 088776f01908..6d244f470968 100644
--- a/arch/um/drivers/stdio_console.c
+++ b/arch/um/drivers/stdio_console.c
@@ -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);